Lecture Frequency Synthesizers - I (6/25/03) Page 170-1
|
|
- Heather Kennedy
- 6 years ago
- Views:
Transcription
1 Lecure 170 Frequency Synhesizers I (6/25/03) Page 1701 LECTURE 170 APPLICATIONS OF PLLS AN FREQUENCY IVIERS (PRESCALERS) (References [2, 3, 4, 6, 11]) Objecive The objecive of his presenaion is: 1.) Examine he applicaions of PLLs 2.) evelop and characerize he echniques used for frequency division Ouline Applicaions of PLLs Inegraed Circui Frequency Synhesizers Archiecures and Techniques ividers for Frequency Synhesizers NoiseShaping Techniques Summary Lecure 170 Frequency Synhesizers I (6/25/03) Page 1702 APPLICATIONS OF PLLS The PLL The PLL is a very versaile building block and is suiable for a variey of applicaions including: 1.) emodulaion and modulaion 2.) Signal condiioning 3.) Frequency synhesis 4.) Clock and daa recovery 5.) Frequency ranslaion
2 Lecure 170 Frequency Synhesizers I (6/25/03) Page 1703 FM emodulaion When he PLL is locked on a frequency modulaed signal, he conrolling volage o he VCO becomes proporional o he frequency. v in Phase eecor Loop Filer Posdeecion Filer v ou VCO v c v in f 1 f 2 f 1 V 2 v ou V 1 Fig Can be used for frequency shif keying (FSK) if a volage discriminaor is placed a he oupu. Lecure 170 Frequency Synhesizers I (6/25/03) Page 1704 FM emodulaion Example If K o = 2π(1kHz/Vol), K v = 500 (sec1) and ω o = 1000π rads/sec ( = 500Hz) for he FM demodulaor on he previous slide, (a.) Find V o for f i = 250Hz and 1000Hz. (b.) Wha is he ime consan of V o for a sep change beween hese wo frequencies? Soluion (a.) We know ha ω i ω o ω osc = ω i = ω o K o V o V o = K o V o (250Hz) = = 0.25V V o (1000Hz) = = 0.5V (b.) τ = 1 K v = 2ms We noe ha he riseimes of he square wave on he previous page would no longer be zero bu ake abou 10ms o go from one level o anoher.
3 Lecure 170 Frequency Synhesizers I (6/25/03) Page 1705 FM emodulaor Example Coninued Example: For he PLL of he previous example, find v o () if he inpu signal is frequency modulaed so ha ω i () = 2π(500Hz)[10.1sin(2πx102)]. Soluion V o (jω) ω i (jω) = 1 K v K o K v jω = 1 K v K o K v j2πx100 ω=200π = 2000π 500j628 = π (0.39j0.48) ω i (jω) = 0.1(1000π) = 100π = 50(2π) V o (jω) = (0.39j0.48) = /51 = 0.031/51 or v o () = sin[(2πx102)51 ] Lecure 170 Frequency Synhesizers I (6/25/03) Page 1706 Phase Modulaor When he PLL is locked on a fixed frequency, a slowly varying signal, v m (), can be used o cause he phase shif he VCO o shif achieving a phase modulaor. Phase modulaion signal v m () Phase eecor Loop Filer vc VCO v ou Fig v ou () = V ou cos[ω ref θ m ()] where θ m () = 1 K d v m()
4 Lecure 170 Frequency Synhesizers I (6/25/03) Page 1707 Signal Condiioning The PLL can operae as a narrowband filer wih an exremely high Q o selec a desired signal in he presence of undesired signals. v in Phase eecor Loop Filer v c VCO v ou ω c ω c Fig This applicaion represens a radeoff in he capure range and he loop bandwidh. If he loop bandwidh is small, he SNR of he oupu can be much greaer han he inpu. If he loop bandwidh is large, he capure range for he desired signal is larger (can rack he desired signal beer). Lecure 170 Frequency Synhesizers I (6/25/03) Page 1708 Frequency Synhesis ividers placed in he feedback and/or inpu allow he generaion of frequencies based on a sable reference frequency. M Volage which makes f = LO M N M Phase eecor Loop Filer VCO u = M N f LO N N Oscillaor conrol volage Fig A When he phase deecor is locked, he wo incoming frequencies are equal. Therefore, M = u N u = N M
5 Lecure 170 Frequency Synhesizers I (6/25/03) Page 1709 Clock and aa Recovery The funcion of a clock and daa recovery circui is o produce a sable iming signal from a sream of binary daa. Clock recovery consiss of wo basic funcions: 1.) Edge deecion 2.) Generaion of a sable periodic oupu in Edge eecor Phase eecor Loop Filer v c VCO Clock Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page Jier Suppression In digial communicaions, ransmier or rerieved daa may suffer from iming jier. A PLL clock recovery circui can be used o regenerae he signal and eliminae he jier as shown below. Flipflop in Q ou Clock Recovery Circui in Clock ou Fig
6 Lecure 170 Frequency Synhesizers I (6/25/03) Page Frequency Translaion The PLL can be used o ranslae he frequency of a highly sable bu fixed frequency oscillaor by a small amoun in frequency. Someimes called frequency offse loop. sc ± fosc f 1 Mixer LPF Phase eecor Loop Filer vc VCO u = f 1 sc Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page IC FREQUENCY SYNTHESIZERS ARCHITECTURES AN TECHNIQUES Synhesizer Specificaions for Various Wireless Sandards Wireless Sandard Frequency Range (MHz) Channel Spacing Number of Channels Swiching Time GSM Rx: kHz µs Tx: CS1800 Rx: kHz µs Tx: PCS1900 Rx: kHz 800µs Tx: ECT MHz µs AMPS Rx: kHz 832 Slow Tx: CMA Rx: MHz 20 Tx: PHS1900 Rx: kHz ms IS54 Rx: kHz 832 Slow Tx: WLAN MHz 79 Several µs
7 Lecure 170 Frequency Synhesizers I (6/25/03) Page Componens of a Frequency Synhesizer Funcion of a frequency synhesizer is o generae a frequency from a reference frequency. Block diagram: Reference Frequency Phase Frequency eecor (PF) LPF VCO Componens: Phase/frequency deecor oupus a /N ivider (1/N) Fig signal ha is proporional o he difference beween he frequency/phase of wo inpu periodic signals. The lowpass filer is use o reduce he phase noise and enhance he specral puriy of he oupu. The volageconrolled oscillaor akes he filered oupu of he PF and generaes an oupu frequency which is conrolled by he applied volage. The divider scales he oupu frequency by a facor of N. = N = N Lecure 170 Frequency Synhesizers I (6/25/03) Page Basic Frequency Synhesizer Archiecure Simple frequency synhesizer: Reference Frequency Phase Frequency eecor (PF) LPF VCO /N ivider (1/N) Fig Commens: Frequency sep size is equal o. Thus, for small channel spacing,, is small which makes N large. Large N resuls in an increase in he inband phase noise of he VCO signal by 20log(N). = N
8 Lecure 170 Frequency Synhesizers I (6/25/03) Page Basic Frequency Synhesizer Archiecure Coninued Frequency Synhesizer wih a SingleModulus Prescaler: PF LPF VCO Programmable ivider 1/N p Commens: = N P P Only he prescaler needs o run a very high speed Prescaler 1/P Fig Since P is fixed, he value of N P is smaller causing increased channel spacing resuls in increased lockon ime and sidebands a undesirable frequencies Soluion: 1/P /P PF LPF VCO Programmable ivider 1/N p Prescaler 1/P Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page Basic Frequency Synhesizer Archiecure Coninued Frequency Synhesizer wih a ualmodulus Prescaler: Operaion: 1.) The modulus conrol signal is low a he beginning of a coun cycle enabling he prescaler o divide by P 1 unil he A couner couns o zero. 2.) The modulus conrol signal goes high enabling he prescaler o divide by P, unil he N P couner couns down he res of he way o zero (N P A). 3.) Thus, N = (N P A)P A(P1) = N P A = (N P A). 4.) The modulus conrol is se back low, he couners are rese o heir respecive programmed values and he sequence is repeaed. Commens: N P > A The value of P divided by he maximum frequency of he VCO mus no exceed he frequency capabiliy of he N P and A couners. P imes he period of he maximum VCO frequency > he sum of he propagaion delay hrough he dualmodulus prescaler plus he prescaler seup or release ime relaive o is conrol signal plus he propagaion delay of o he modulus conrol. PLL N P Couner ualmodulus 1/N Prescaler P 1/P or 1/(P1) A Couner Conrol Logic Fig
9 Lecure 170 Frequency Synhesizers I (6/25/03) Page Example ual Modulus Frequency Synhesizer A block diagram for a dual modulus frequency synhesizer is shown. (a.) If his synhesizer divides he VCO oupu by N1 every K VCO cycles and by N for he res of he ime, express he oupu frequency, u, as a funcion of N, K, and. (b.) If you waned o use his frequency synhesizer o generae an oupu frequency of MHz from a reference frequency of 100kHz, wha would be he value of N and how many cycles ou of 100 would you divide by N1 where he remaining cycles you would divide by N? Soluion (a.) The average divide facor is expressed as N eff = (N1)xuy cycle for N1 Nxuy cycle for N PLL N,N1 Modulus Conrol u F00FE01 1 = (N1) K N 1 1 K = N1 K f ou = N eff = N 1 K f ref (b.) ividing MHz by 100kHz gives Therefore, choose N = 271 and divide by N1 or 272 for 35 cycles ou of 100 and by N for he remaining 65 cycles. Thus, N = 271 and K = 35 cycles for every 100 cycles Lecure 170 Frequency Synhesizers I (6/25/03) Page FracionalN Frequency Synhesizer The oupu frequency can be finer han because division raio in he feedback loop does no have o be an ineger. Operaion: Make he division raio alernae beween N or N 1 in a conrolled and repeiive fashion o average an inermediae value beween N and N 1. For example, assume ha he synhesizer divides by N 1 every L cycles and by N he res of he ime. The average division raion is N aver = N 1 L. Therefore, 1 = (N1) L N 1 1 L f ref = N 1 L f ref FracionalN Techniques: Technique Feaure Problem AC phase esimaion Cancel spurs by AC Analog mismach Random Jiering Randomize divider Frequency jier Σ modulaion Modulae he divider raio Quanizaion noise Phase inerpolaion Inheren fracional divider Inerpolaion jier Pulse generaion Inser pulses Inerpolaion jier PF LPF VCO k mbis ivide by N or N1 Overflow mbi Accumulaor Fig
10 Lecure 170 Frequency Synhesizers I (6/25/03) Page A 1 GHz FracionalN Frequency Synhesizer Block diagram: PF/CP LPF Mulimodulus Prescaler N2, N1, N, N1, N2, N3 LC VCO Buffer Oupu Conrol nbis N2 N1 N N1 N2 N3 Mode Conrol Logic C 1 C 2 1 C 3 2 ab ab ab Fig Experimenal Resuls: Carrier Phase Noise, Phase Noise, Phase Noise, Phase Noise, Phase Noise, Frequency 10kHz offse 100kHz offse 200kHz offse 600kHz offse 1MHz offse 972 MHz 83.1dBc/Hz 104.1dBc/Hz 110dBc/Hz 188dBc/Hz 122.4dBc/Hz 916MHz 84.6dBc/Hz 104.4dBc/Hz 110.4dBc/Hz 118.2dBc/Hz 122.7dBc/Hz Sideband spurs < 70dBc, power supply range of 2.7 o 4.5V (5.2mA a 3V), uning range 0.881GHz Lecure 170 Frequency Synhesizers I (6/25/03) Page A LowNoise, 1.6 GHz CMOS Frequency Synhesizer A CMOS PLL used o design he fronend RF funcion of frequency synhesizer. Block iagram: = 61.5MHz PF Charge Pump Loop Filer LC VCO ivide by 1/26 Circui iagram of he LC Oscillaor: C Tune L 1 M1 V Bias M3 M2 I SS V L 2 C var C AC CTune C AC C var R R To Loop Filer Fig Performance: Power supply 2.7V o 5V Power dissipaion a 3V is 90mW Phase noise of 105dBc/Hz a 200kHz offse Tuning range of 1.6GHz±100MHz 1.5mm2 in 0.6µm CMOS echnology Fig J.Parker and.ray, A LowNoise 1.6 GHz CMOS PLL wih OnChip Loop Filer, Proc. of 1997 Conf. on Cusom Inegraed Circuis, May 1997.
11 Lecure 170 Frequency Synhesizers I (6/25/03) Page Comparison of Recen CMOS VCO Noise Resuls Auhor Craninckx, Seyar, ISSCC95 Rael, Abidi, ISSCC96 Souyer, ISSCC96 Thamsirianu, CICC94 Weigand, ISCAS94 Parker, Ray, CICC97 Power issipaion P Frequency f 0 Phase Noise o Carrier Raio Offse Freq. (f) Esimaed Open Loop Q 1.8 GHz 85dBc 10kHz 10 4x mW@3V 900MHz 100dBc/Hz 100kHz 4 1.7x mW@3V 4GHz 106dBc/Hz 1MHz 7 1.2x mW@3V 900MHz 93dBc/Hz 100kHz 1 (Class B ring osc.) 0.3x mW@3V 1GHz 85dBc/Hz 100kHz 1 (Class A ring osc.) 2.5x mW@3V 1.6GHz 105dBc/Hz 200kHz 7 0.6x1015 Park, CICC98 17mW@3V 980MHz 109dBc/Hz 200kHz 8 0.2x1015 Phase Noise Carrier Ampliude = K f 0 0 f 2 1 PQ K 0 Lecure 170 Frequency Synhesizers I (6/25/03) Page IVIERS FOR FREQUENCY SYNTHESIZERS Inroducion We have seen ha in he previous maerial ha dividers can be eiher fixed or programmable. In his secion we will focus on circuis and conceps suiable for fixed, ineger and fracionaln dividers. In addiion, we shall consider noiseshaping echniques using delasigma mehods applied o he fracionaln echnique.
12 Lecure 170 Frequency Synhesizers I (6/25/03) Page Fixed ividers ToggleFlipflop based divideby2: v osc v osc Q Q v div v div ToggleFlipflop v osc Flipflop Implemenaion: Proper sizing of he ransisors resuls in reasonable powerspeed radeoffs a GHz raes. evice mismaches can resul in phase imbalances as large as 5. If he inpu is no perfecly differenial, addiional phase unbalances can occur. R L M1 Fig V RL M2 M4 M5 Q Q M3 M6 Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page ual Modulus ividers Evoluion of a divideby2/3 from a divideby3 circui: Q Q 1 1 G Q G 1 FF 1 FF 2 Q 2 Q G Q 2 Fig ivideby2/3 circui (MC=1 2, MC=0 3): N=3 Q FF 1 Q 1 G 1 G FF 2 Q Q 2 Q 1 G MC Fig Q 2 N=2
13 Lecure 170 Frequency Synhesizers I (6/25/03) Page ual Modulus ividers Coninued Sae diagram of he divide by 2/3 circui: MC=0 "1" Q 1 Q 2 :00 Q 1 Q 2 :01 2/3 decision poin "X" "1" "0" Q 1 Q 2 :01 "X" Q 1 Q 2 :11 Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page Speed of he ual Modulus ivider The divideby3 circuis are generally much slower han heir dividebywo counerpars. Consider he implemenaion of par of he previous divideby2/3 circui. G 1 V V FF2 R L RL R L RL Q 2 Q2 M1 M2 M1 M2 M4 M5 M3 M3 M6 Fig On he clock edge where Q 2 mus change, sufficien ime mus be allowed for he delay of he AN gae, G 1, and he inpu sage of FF2 before he nex clock ransiion. I is seen ha he delay for 3 circui is nearly wice ha of he 2 circui.
14 Lecure 170 Frequency Synhesizers I (6/25/03) Page Programmable ividers A divider can be achieved by using a programmable couner. Preload Inpu (= division raio M) Preload Enable Clock (= ) Programmable Couner, N 2 Maximum coun = N 2 Couner Oupu (= f divide ) For a given speed requiremen, a programmable Fig divider is less power opimized because he criical pah is dependen on he loaded value. A complee divider consising of a fixed divider cascaded wih a programmable divider. fo Fixed Couner N 1 f inermediae Programmable Couner N 2 Max. coun = N 2 (max) f divide Power is high, power can be opimized Power is low, power canno be opimized Fig Resoluion (Complee divider) = Resoluion (programmable divider) x ivision raio (fixed divider) Lecure 170 Frequency Synhesizers I (6/25/03) Page Waveforms of Various Complee ividers N 1 = 3 and N 2 = 4: f inermediae N 1 = 3 and N 2 = 3: 12 f f divide = /12 divide Fig f inermediae f f divide = /9 divide Fig
15 Lecure 170 Frequency Synhesizers I (6/25/03) Page Waveforms of Various Complee ividers Coninued N 1 = 3/4 (N 1 = 4 for one N 2 cycle) and N 2 = 3: f inermediae f divide 10 f divide = /10 Fig N 1 = 3/4 (N 1 = 4 for wo N 2 cycles) and N 2 = 3: f inermediae f f divide = /11 divide Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page MuliModulus ividers 4/ 5 dual modulus couner example: MC Q1 Q d2 d0 d1 Q f 4, 5 Q Q3 Q2 Sae iagram: Pah B X /5 decision poin X Pah A 0 1 Pah B X Fig f ps Fig Noe ha here are wo possible sae pahs A and B each consising of wo sequences, a 4 sequence and a 5 sequence. For pah A, he 4 sequence is from 000, 001,011, 010, 000 and he 5 sequence is from 000, 001, 011, 010, 100, 000. For pah B, he 4 sequence is from 000, 001, 011, 110, 000 and he 5 sequence is from 000, 001, 011, 110, 100, 000.
16 Lecure 170 Frequency Synhesizers I (6/25/03) Page NOISE SHAPING TECHNIQUES elasigma Shaping Techniques elasigma modulaors can be used along wih mulimodulus dividers o achieve noise shaping of phase noise. The objecive of he delasigma modulaor is o remove he noise due o he flucuaion of he mulimodulus dividers. The following slides review his echnique as applied o frequency synhesizers. Analog implemenaion of a firsorder delasigma modulaor: x() Inegraor 1bi quanizer y(nt) 1bi AC Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page igial Implemenaion of he elasigma Modulaor Inpu, k mbis Clock 1bi mbis mbis Oupu Residue, R F(z) z1 z1 1bi quanizer A(z) m Y(z) 2 m 0 Q(z) A(z) Y(z) Fig The discree firsorder delasigma modulaor can be implemened wih an mbi accumulaor. The mbi accumulaor has m inpu bis, a single oupu bi (carrybi or MSB), and mresidue bis. Operaion: On every cycle of he reference clock, he residue oupu R of he accumulaor is assigned he value Rk afer one cycle if an overflow does no occur or he value Rk2 m if he accumulaor produces a carrybi signal. Therefore, he accumulaor overflow is equivalen o he comparaor decision. The daa sored in he accumulaor is essenially he inegral of he error beween he desired frequency daa k and he acual frequency conrol inpu.
17 Lecure 170 Frequency Synhesizers I (6/25/03) Page HighOrder elasigma Modulaors zransform of a firsorder delasigma modulaor: Q(z) Inpu F(z) 1 1z1 Y(z) z1 nh order delasigma modulaor: f(n) Fig FirsOrder Sigma ela Modulaor y 1 (n) Q(z) q 1 (n) FirsOrder Sigma ela Modulaor y 2 (n) Bi Manipulaion q 2 (n) FirsOrder Sigma ela Modulaor y 3 (n) Circuiry y(n) Fig q N (n) FirsOrder Sigma y N1 (n) ela Modulaor Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Consider he secondorder delasigma modulaor implemened wih mbi accumulaors: 1 Adder 1 1 y(n) Bi Manipulaion Circuiry Inpu, k mbis mbis Residue, R mbis mbis Residue, R mbis Fig mbis
18 Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued zranform model for he previous secondorder delasigma modulaor: Q 1 (z) Inpu F(z) 1 1z1 Y 1 (z) Y(z) z1 Q 1 (z) Q 2 (z) 1 z1 1z1 Y 2 (z) Fig From he above diagram, we can wrie, Y 1 (z) = F(z) (1z 1 )Q 1 (z) and Y 2 (z) = Q 1 (z)(1z 1 ) Q 2 (z)(1z 1 ) 2 can be combined o give, Y (z) = F(z) Q 2 (z)(1z 1 ) 2 Generalizing o he nh order gives, Y (z) = F(z) Q n (z)(1z 1 ) n z1 Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued The effecive divide raio of a fracional divider implemened wih an nh order delasigma modulaor can be wrien as, N eff = N(z) Y(z) = N(z) F(z) Q n (z)(1z 1 ) n where N(z) = ineger par of he divide raio F(z) = fracional par of he divide raio Q(z) = quanizaion noise occurring a he nh delasigma modulaor If he PLL is in lock, hen = N eff = [N(z) F(z)] (1z 1 ) n Q n (z) where he firs erm is he desired frequency and he second erm represen he frequency flucuaion resuling from he quanizaion noise in he fracional modulaor.
19 Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued Assume ha he quanizaion noise is a random quaniy in he inerval {0.5, 0.5 } wih equal probabiliy. If he quanizer is 1bi, hen which is he quanizaion sep size is 1. The noise power or variance, σ e 2, can be found as 0.5 σ e 2 = E(e) = 1 e 2 de = The specrum of he quanizaion noise is where N(f) is given as, N(f) = 2 12 where is he sampling frequency which is equal o he comparison frequency of he PF. N(f) f Fig Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued efine f(z) as he frequency noise of flucuaion of he oupu frequency (z). The power specral densiy, S f(z), can be calculaed from he second erm of he previous expression for (z). S f(z) = (1z 1 ) n = (1z 1 ) n = (1z 1 ) f 2n ref 12 Because phase is relaed o frequency hrough inegraion, he phase noise, θ n (), is θ n () = 2π f()d Using a simple recangular inegraion in he zdomain yields, 2π f(z) Θ n (z) = (1z 1 ) The power specral densiy of he phase noise, S Θn (z), can be wrien as, S Θn (z) = Θ n (z) 2 (2π) 2 S f(z) = f 2 ref 1z 1 2 S f(z) = (2π)2 1z 1 2(n1) 12 f rads 2 /Hz ref Assuming S Θn (f) is a wosided power specral densiy funcion gives L(f) = S Θn (f) L(f) = (2π)2 12 f πf 2(n1) ref 2sin rads 2 /Hz where z 1 has been replaced wih e j2πf/ and n is he order of he modulaor.
20 Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued Prediced phase noise of higherorder modulaors (f sample = 12.8 MHz): Lecure 170 Frequency Synhesizers I (6/25/03) Page Use of a Modulaor for ivider Conrol Coninued Resuls: If a modulaor has an accumulaor inpu daa k consising of m bis, hen he oscillaor oupu frequency,, can be given as, = N k 2 m The uncerainy of his frequency will be reduced by he use of he sigmadela modulaor. Summary: The delasigma modulaor aenuaes phase noise from he facional conroller o negligible levels close o he cener frequency. Furher from he cener frequency, he phase noise increase rapidly and mus be filered ou prior o uning he inpu of he VCO. The loop filer in he PLL is used o filer he noise away from he cener frequency. When a higherorder, delasigma modulaor is used for a fracionaln conroller, he PLL needs more poles in he loop filer o suppress he quanizaion noise a high frequencies.
21 Lecure 170 Frequency Synhesizers I (6/25/03) Page SUMMARY Examine he applicaions of PLLs 1.) emodulaion and modulaion 2.) Signal condiioning 3.) Frequency synhesis 4.) Clock and daa recovery 5.) Frequency ranslaion Inegraed Circui Frequency Synhesizers Archiecures and Techniques Fracional N ividers/prescalers Noise shaping echniques
LECTURE 1 CMOS PHASE LOCKED LOOPS
Lecure 01 (8/9/18) Page 1-1 Objecive LECTURE 1 CMOS PHASE LOCKED LOOPS OVERVIEW Undersand he principles and applicaions of phase locked loops using inegraed circui echnology wih emphasis on CMOS echnology.
More informationChapter 2 Introduction: From Phase-Locked Loop to Costas Loop
Chaper 2 Inroducion: From Phase-Locked Loop o Cosas Loop The Cosas loop can be considered an exended version of he phase-locked loop (PLL). The PLL has been invened in 932 by French engineer Henri de Belleszice
More informationReceiver Architectures
27/Dec/26 1 Receiver Archiecures Image-Rejec Receivers Shif-by-9 o For narrowband signal: sin cos +j /2 +j (a) T / 4 X = j j /2 G( ) = j sgn( ) 1/2 (b) Figure 5.23 Shif by 9 o in (a) ime and (b) frequency
More informationUNIT IV DIGITAL MODULATION SCHEME
UNI IV DIGIAL MODULAION SCHEME Geomeric Represenaion of Signals Ojecive: o represen any se of M energy signals {s i (} as linear cominaions of N orhogonal asis funcions, where N M Real value energy signals
More informationSolution of ECE 342 Test 2 S12
Soluion of ECE 342 Tes 2 S2. All quesions regarding superheerodyne receivers refer o his diagram. x c () Anenna B T < B RF < 2 f B = B T Oher Signals f c Mixer f Baseband x RFi RF () x RFo () () () x i
More informationChapter 2 Summary: Continuous-Wave Modulation. Belkacem Derras
ECEN 44 Communicaion Theory Chaper Summary: Coninuous-Wave Modulaion.1 Modulaion Modulaion is a process in which a parameer of a carrier waveform is varied in accordance wih a given message (baseband)
More informationCommunication Systems. Department of Electronics and Electrical Engineering
COMM 704: Communicaion Lecure : Analog Mulipliers Dr Mohamed Abd El Ghany Dr. Mohamed Abd El Ghany, Mohamed.abdel-ghany@guc.edu.eg nroducion Nonlinear operaions on coninuous-valued analog signals are ofen
More informationCommunications II Lecture 7: Performance of digital modulation
Communicaions II Lecure 7: Performance of digial modulaion Professor Kin K. Leung EEE and Compuing Deparmens Imperial College London Copyrigh reserved Ouline Digial modulaion and demodulaion Error probabiliy
More informationf t 2cos 2 Modulator Figure 21: DSB-SC modulation.
4.5 Ampliude modulaion: AM 4.55. DSB-SC ampliude modulaion (which is summarized in Figure 21) is easy o undersand and analyze in boh ime and frequency domains. However, analyical simpliciy is no always
More informationSignal Characteristics
Signal Characerisics Analog Signals Analog signals are always coninuous (here are no ime gaps). The signal is of infinie resoluion. Discree Time Signals SignalCharacerisics.docx 8/28/08 10:41 AM Page 1
More informationAnalog/Digital Communications Primer
for Amaeur Radio Virginia Polyechnic Insiue & Sae Universiy March 19, 2013 # include //... in main() { floa kf = 0.1f; // modulaion facor liquid_freqdem_ype ype = LIQUID_FREQDEM_DELAYCONJ;
More informationPassband Data Transmission I References Phase-shift keying Chapter , S. Haykin, Communication Systems, Wiley. G.1
Passand Daa ransmission I References Phase-shif keying Chaper 4.-4.3, S. Haykin, Communicaion Sysems, Wiley. G. Inroducion Inroducion In aseand pulse ransmission, a daa sream represened in he form of a
More informationWrap Up. Fourier Transform Sampling, Modulation, Filtering Noise and the Digital Abstraction Binary signaling model and Shannon Capacity
Wrap Up Fourier ransorm Sampling, Modulaion, Filering Noise and he Digial Absracion Binary signaling model and Shannon Capaciy Copyrigh 27 by M.H. Perro All righs reserved. M.H. Perro 27 Wrap Up, Slide
More informationPrinciples of Communications
Sae Key Lab. on ISN, Xidian Universiy Principles of Communicaions Chaper VI: Elemenary Digial Modulaion Sysem Email: ychwang@mail.xidian.edu.cn Xidian Universiy Sae Key Lab. on ISN December 13, 2013 Sae
More informationChapter 4: Angle Modulation
Tes 2 Review Tes 2 Review Professor Deepa Kundur Universiy of Torono Reference: Secions: 4.1, 4.2, 4.3, 4.4, 4.6, 4.7, 4.8 of 5.1, 5.2, 5.3, 5.4, 5.5 6.1, 6.2, 6.3, 6.4, 6.5, 6.6 S. Haykin and M. Moher,
More informationChapter 4: Angle Modulation
Tes 2 Review Tes 2 Review Professor Deepa Kundur Universiy of Torono Reference: Secions: 4.1, 4.2, 4.3, 4.4, 4.6, 4.7, 4.8 of 5.1, 5.2, 5.3, 5.4, 5.5 6.1, 6.2, 6.3, 6.4, 6.5, 6.6 S. Haykin and M. Moher,
More informationFROM ANALOG TO DIGITAL
FROM ANALOG TO DIGITAL OBJECTIVES The objecives of his lecure are o: Inroduce sampling, he Nyquis Limi (Shannon s Sampling Theorem) and represenaion of signals in he frequency domain Inroduce basic conceps
More informationANALOG AND DIGITAL SIGNAL PROCESSING LABORATORY EXPERIMENTS : CHAPTER 3
Laboraory # Chap 3 Objecives Linear Sysem Response: general case Undersand he difference and he relaionship beween a sep and impulse response. Deermine he limis of validiy of an approximaed impulse response.
More informationOptical Short Pulse Generation and Measurement Based on Fiber Polarization Effects
Opical Shor Pulse Generaion and Measuremen Based on Fiber Polarizaion Effecs Changyuan Yu Deparmen of Elecrical & Compuer Engineering, Naional Universiy of Singapore, Singapore, 117576 A*STAR Insiue for
More informationECE ANALOG COMMUNICATIONS - INVESTIGATION 7 INTRODUCTION TO AMPLITUDE MODULATION - PART II
ECE 405 - ANALOG COMMUNICATIONS - INVESTIGATION 7 INTRODUCTION TO AMPLITUDE MODULATION - PART II FALL 2005 A.P. FELZER To do "well" on his invesigaion you mus no only ge he righ answers bu mus also do
More informationTELE4652 Mobile and Satellite Communications
TELE465 Mobile and Saellie Communicaions Assignmen (Due: 4pm, Monday 7 h Ocober) To be submied o he lecurer before he beginning of he final lecure o be held a his ime.. This quesion considers Minimum Shif
More informationPassband Data Transmission II References Frequency-shift keying Chapter 6.5, S. Haykin, Communication Systems, Wiley. H.1
Passand Daa ransmission II Reerences Frequency-shi keying Chaper 6.5, S. Haykin, Communicaion Sysems, Wiley. H. Inroducion Inroducion PSK and QAM are linear modulaion FSK is a nonlinear modulaion Similar
More informationCommunication Systems. Communication Systems
Communicaion Sysems Analog communicaion Transmi and receive analog waveforms Ampliude Modulaion (AM Phase Modulaion (PM Freq. Modulaion (FM Quadraure Ampliude Modulaion (QAM Pulse Ampliude Modulaion (PAM
More informationECMA st Edition / June Near Field Communication Wired Interface (NFC-WI)
ECMA-373 1 s Ediion / June 2006 Near Field Communicaion Wired Inerface (NFC-WI) Sandard ECMA-373 1 s Ediion / June 2006 Near Field Communicaion Wired Inerface (NFC-WI) Ecma Inernaional Rue du Rhône 114
More informationAn Open-Loop Class-D Audio Amplifier with Increased Low-Distortion Output Power and PVT-Insensitive EMI Reduction
Paper 8-6 An Open-Loop Class-D Audio Amplifier wih Increased Low-Disorion Oupu Power and PVT-Insensiive EMI Reducion Shih-Hsiung Chien 1, Li-Te Wu 2, Ssu-Ying Chen 2, Ren-Dau Jan 2, Min-Yung Shih 2, Ching-Tzung
More informationMemorandum on Impulse Winding Tester
Memorandum on Impulse Winding Teser. Esimaion of Inducance by Impulse Response When he volage response is observed afer connecing an elecric charge sored up in he capaciy C o he coil L (including he inside
More informationLecture 5: DC-DC Conversion
1 / 31 Lecure 5: DC-DC Conversion ELEC-E845 Elecric Drives (5 ECTS) Mikko Rouimo (lecurer), Marko Hinkkanen (slides) Auumn 217 2 / 31 Learning Oucomes Afer his lecure and exercises you will be able o:
More informationSynchronization of single-channel stepper motor drivers reduces noise and interference
hronizaion of single-channel sepper moor drivers reduces noise and inerference n mos applicaions, a non-synchronized operaion causes no problems. However, in some cases he swiching of he wo channels inerfere,
More informationAnalog Circuits EC / EE / IN. For
Analog Circuis For EC / EE / IN By www.hegaeacademy.com Syllabus Syllabus for Analog Circuis Small Signal Equivalen Circuis of Diodes, BJTs, MOSFETs and Analog CMOS. Simple Diode Circuis, Clipping, Clamping,
More informationTest 1 Review. Test 1 Review. Communication Systems: Foundational Theories. Communication System. Reference: Sections and
Tes 1 Review Tes 1 Review Proessor Deepa Kundur Universiy o Torono Reerence: Secions 2.2-2.7 and 3.1-3.6 o S. Haykin and M. Moher, Inroducion o Analog & Digial Communicaions, 2nd ed., John iley & Sons,
More informationEXPERIMENT #4 AM MODULATOR AND POWER AMPLIFIER
EXPERIMENT #4 AM MODULATOR AND POWER AMPLIFIER INTRODUCTION: Being able o ransmi a radio frequency carrier across space is of no use unless we can place informaion or inelligence upon i. This las ransmier
More informationInvestigation and Simulation Model Results of High Density Wireless Power Harvesting and Transfer Method
Invesigaion and Simulaion Model Resuls of High Densiy Wireless Power Harvesing and Transfer Mehod Jaber A. Abu Qahouq, Senior Member, IEEE, and Zhigang Dang The Universiy of Alabama Deparmen of Elecrical
More informationEE201 Circuit Theory I Fall
EE1 Circui Theory I 17 Fall 1. Basic Conceps Chaper 1 of Nilsson - 3 Hrs. Inroducion, Curren and Volage, Power and Energy. Basic Laws Chaper &3 of Nilsson - 6 Hrs. Volage and Curren Sources, Ohm s Law,
More informationModulation exercises. Chapter 3
Chaper 3 Modulaion exercises Each problem is annoaed wih he leer E, T, C which sands for exercise, requires some hough, requires some concepualizaion. Problems labeled E are usually mechanical, hose labeled
More informationEXPERIMENT #9 FIBER OPTIC COMMUNICATIONS LINK
EXPERIMENT #9 FIBER OPTIC COMMUNICATIONS LINK INTRODUCTION: Much of daa communicaions is concerned wih sending digial informaion hrough sysems ha normally only pass analog signals. A elephone line is such
More informationHigh Gain Opamp based Comparator Design for Sigma Delta Modulator
Indian Journal of Science Technology, Vol 9(9), DOI: 10.17485/ijs/016/v9i9/90858, Augus 016 ISSN (Prin) : 0974-6846 ISSN (Online) : 0974-5645 High Gain Opamp based Comparaor Design for Sigma Dela Modulaor
More informationActive Filters - 1. Active Filters - 2
PHY35 - Elecronics Laboraory, all Term (K rong) Acie ilers - By combining op-amps wih energy-sorage elemens, circuis can be designed o gie frequency-dependen op-amp responses Acie filers are hose ha use
More informationP. Bruschi: Project guidelines PSM Project guidelines.
Projec guidelines. 1. Rules for he execuion of he projecs Projecs are opional. Their aim is o improve he sudens knowledge of he basic full-cusom design flow. The final score of he exam is no affeced by
More informationECMA-373. Near Field Communication Wired Interface (NFC-WI) 2 nd Edition / June Reference number ECMA-123:2009
ECMA-373 2 nd Ediion / June 2012 Near Field Communicaion Wired Inerface (NFC-WI) Reference number ECMA-123:2009 Ecma Inernaional 2009 COPYRIGHT PROTECTED DOCUMENT Ecma Inernaional 2012 Conens Page 1 Scope...
More informationTable of Contents. 3.0 SMPS Topologies. For Further Research. 3.1 Basic Components. 3.2 Buck (Step Down) 3.3 Boost (Step Up) 3.4 Inverter (Buck/Boost)
Table of Conens 3.0 SMPS Topologies 3.1 Basic Componens 3.2 Buck (Sep Down) 3.3 Boos (Sep Up) 3.4 nverer (Buck/Boos) 3.5 Flyback Converer 3.6 Curren Boosed Boos 3.7 Curren Boosed Buck 3.8 Forward Converer
More informationIndustrial, High Repetition Rate Picosecond Laser
RAPID Indusrial, High Repeiion Rae Picosecond Laser High Power: RAPID is a very cos efficien, compac, diode pumped Nd:YVO4 picosecond laser wih 2 W average power a 1064 nm. Is 10 ps-pulses have high pulse
More informationEE 330 Lecture 24. Amplification with Transistor Circuits Small Signal Modelling
EE 330 Lecure 24 Amplificaion wih Transisor Circuis Small Signal Modelling Review from las ime Area Comparison beween BJT and MOSFET BJT Area = 3600 l 2 n-channel MOSFET Area = 168 l 2 Area Raio = 21:1
More informationNoise Reduction/Mode Isolation with Adaptive Down Conversion (ADC)
Page 1 Noise Reducion/Mode Isolaion wih Adapive Down Conversion (ADC) Abel B. Diaz, Thomas W. Tunnell NSTec Los Alamos Operaions Presened o PDV Workshop 8-16-2007 Page 2 Summary Adapive down conversion
More informationEE 40 Final Project Basic Circuit
EE 0 Spring 2006 Final Projec EE 0 Final Projec Basic Circui Par I: General insrucion 1. The final projec will coun 0% of he lab grading, since i s going o ake lab sessions. All oher individual labs will
More informationDigital Communications - Overview
EE573 : Advanced Digial Communicaions Digial Communicaions - Overview Lecurer: Assoc. Prof. Dr Noor M Khan Deparmen of Elecronic Engineering, Muhammad Ali Jinnah Universiy, Islamabad Campus, Islamabad,
More informationSynchronization of the bit-clock in the receiver
Synchronizaion of he bi-clock in he receiver Necessiy - he recovery and synchronizaion of he local bi-clock in he receiver is required for wo reasons: he sampling of he coded received signal should be
More informationProblem Sheet: Communication Channels Communication Systems
Problem Shee: Communicaion Channels Communicaion Sysems Professor A. Manikas Chair of Communicaions and Array Processing Deparmen of Elecrical & Elecronic Engineering Imperial College London v.11 Communicaion
More informationEE558 - Digital Communications
EE558 - Digial Communicaions Lecure 1: Inroducion & Overview Dr. Duy Nguyen Ouline 1 Course Informaion 2 Inroducion o Digial Communicaions Course Informaion 2 Adminisraion Hours and Locaion Lecures: TTH
More information4 20mA Interface-IC AM462 for industrial µ-processor applications
Because of he grea number of indusrial buses now available he majoriy of indusrial measuremen echnology applicaions sill calls for he sandard analog curren nework. The reason for his lies in he fac ha
More informationM2 3 Introduction to Switching Regulators. 1. What is a switching power supply? 2. What types of switchers are available?
M2 3 Inroducion o Swiching Regulaors Objecive is o answerhe following quesions: 1. Wha is a swiching power supply? 2. Wha ypes of swichers are available? 3. Why is a swicher needed? 4. How does a swicher
More information4.5 Biasing in BJT Amplifier Circuits
4/5/011 secion 4_5 Biasing in MOS Amplifier Circuis 1/ 4.5 Biasing in BJT Amplifier Circuis eading Assignmen: 8086 Now le s examine how we C bias MOSFETs amplifiers! f we don bias properly, disorion can
More informationECE3204 Microelectronics II Bitar / McNeill. ECE 3204 / Term D-2017 Problem Set 7
EE3204 Microelecronics II Biar / McNeill Due: Monday, May 1, 2017 EE 3204 / Term D-2017 Problem Se 7 All ex problems from Sedra and Smih, Microelecronic ircuis, 7h ediion. NOTES: Be sure your NAME and
More informationSoftware solutions to mitigate the EM emission of power modules
Sofware soluions o miigae he EM emission of power modules Franco Fiori Elecronics and Telecom Dp. (DET), Poliecnico di Torino, Ialy franco.fiori@polio.i Ouline An inroducion o EMI filering in power modules
More informationGenerating Polar Modulation with R&S SMU200A
Rohde & Schwarz producs: SMU00 Generaing Polar Modulaion wih R&S SMU00 Polar modulaion is a mehod where digial modulaion is realized as a combinaion of phase and ampliude modulaion, raher han using an
More informationCommunications II Lecture 5: Effects of Noise on FM. Professor Kin K. Leung EEE and Computing Departments Imperial College London Copyright reserved
Communicaions II Lecure 5: Eecs o Noise on FM Proessor Kin K. Leung EEE and Compuing Deparmens Imperial College London Copyrigh reserved Ouline Recap o FM FM sysem model in noise Derivaion o oupu SNR Pre/de-emphasis
More informationPulse Train Controlled PCCM Buck-Boost Converter Ming Qina, Fangfang Lib
5h Inernaional Conference on Environmen, Maerials, Chemisry and Power Elecronics (EMCPE 016 Pulse Train Conrolled PCCM Buck-Boos Converer Ming Qina, Fangfang ib School of Elecrical Engineering, Zhengzhou
More informationObsolete Product(s) - Obsolete Product(s)
DUAL SWITCH-MODE SOLENOID DRIER HIGH CURRENT CAPABILITY (up o.5a per channel) HIGH OLTAGE OPERATI (up o 46 for power sage) HIGH EFFICIENCY SWITCHMODE OPERATI REGULATED OUTPUT CURRENT (adjusable) FEW EXTERNAL
More informationLecture 4. EITN Chapter 12, 13 Modulation and diversity. Antenna noise is usually given as a noise temperature!
Lecure 4 EITN75 2018 Chaper 12, 13 Modulaion and diversiy Receiver noise: repeiion Anenna noise is usually given as a noise emperaure! Noise facors or noise figures of differen sysem componens are deermined
More informationResearch Article AD-PLL for WiMAX with Digitally-Regulated TDC and Glitch Correction Logic
Hindawi Publishing Corporaion EURASIP Journal on Embedded Sysems Volume 21, Aricle ID 175764, 8 pages doi:1.1155/21/175764 Research Aricle AD-PLL for WiMAX wih Digially-Regulaed TDC and Glich Correcion
More informationNotes on the Fourier Transform
Noes on he Fourier Transform The Fourier ransform is a mahemaical mehod for describing a coninuous funcion as a series of sine and cosine funcions. The Fourier Transform is produced by applying a series
More informationISSCC 2007 / SESSION 29 / ANALOG AND POWER MANAGEMENT TECHNIQUES / 29.8
ISSCC 27 / SESSION 29 / ANALOG AND POWER MANAGEMENT TECHNIQUES / 29.8 29.8 A 3GHz Swiching DC-DC Converer Using Clock- Tree Charge-Recycling in 9nm CMOS wih Inegraed Oupu Filer Mehdi Alimadadi, Samad Sheikhaei,
More informationJitter Analysis of Current-Mode Logic Frequency Dividers
Universiy of California a Davis, Deparmen of Elecrical and Compuer Engineering Marko Aleksic Jier Analysis of Curren-Mode Logic Frequency Dividers Ph.D. Research Proposal able of Conens Secion : Inroducion
More informationDiodes. Diodes, Page 1
Diodes, Page 1 Diodes V-I Characerisics signal diode Measure he volage-curren characerisic of a sandard signal diode, he 1N914, using he circui shown below. The purpose of he back-o-back power supplies
More informationA WIDEBAND RADIO CHANNEL MODEL FOR SIMULATION OF CHAOTIC COMMUNICATION SYSTEMS
A WIDEBAND RADIO CHANNEL MODEL FOR SIMULATION OF CHAOTIC COMMUNICATION SYSTEMS Kalle Rui, Mauri Honanen, Michael Hall, Timo Korhonen, Veio Porra Insiue of Radio Communicaions, Helsini Universiy of Technology
More informationunmodulated carrier phase refference /2 /2 3π/2 APSK /2 3/2 DPSK t/t s
The PSK Modulaion - PSK is a modulaion ha modifies he phase of a carrier signal, a he beginning of he symbol period, wih a value ha depends on he mulibi ha has o be modulaed - i exhibis a good resilience
More informationAn Improved Zero-Voltage-Transition Technique in a Single-Phase Active Power Factor Correction Circuit
An Improved Zero-lage-Transiion Technique in a Single-Phase Acive Power Facor Correcion Circui Suriya Kaewarsa School of Elecrical Engineering, Rajamangala Universiy of Technology Isan Sakon Nakhon Campus,
More informationESD. What is ESD? Lightning to the buildings. ESD to IC s. ESD protection circuit for IC s. Lightning Rod for Buildings
007/Dec/9 Wha is ESD? ESD ElecroSaic Discharge ESD is a high-curren (~mps) and shor-duraion ime (~ns) even ESD even due o ribo-elecrically generaed charges. ESD o IC s Lighning o he buildings ESD proecion
More informationFolded Multiple-Capture: An Architecture for High Dynamic Range Disturbance-Tolerant Focal Plane Array
Folded Muliple-Capure: An Archiecure for High Dynamic Range Disurbance-Toleran Focal Plane Array Sam Kavusi and Abbas El Gamal Deparmen of Elecrical Engineering, Sanford Universiy, Sanford, CA 94305 ABSTRACT
More informationQuestion 1 TELE4353. Average Delay Spread. RMS Delay Spread = = Channel response (2) Channel response (1)
ELE4353 Mobile and Saellie Communicaion Syem uorial 3 (wee 7-8 S 4 Queion If a paricular modulaion provide uiable ER performance whenever σ /
More informationRevision: June 11, E Main Suite D Pullman, WA (509) Voice and Fax
2.5.3: Sinusoidal Signals and Complex Exponenials Revision: June 11, 2010 215 E Main Suie D Pullman, W 99163 (509) 334 6306 Voice and Fax Overview Sinusoidal signals and complex exponenials are exremely
More informationORDER INFORMATION TO pin 320 ~ 340mV AMC7150DLF
www.addmek.com DESCRIPTI is a PWM power ED driver IC. The driving curren from few milliamps up o 1.5A. I allows high brighness power ED operaing a high efficiency from 4Vdc o 40Vdc. Up o 200KHz exernal
More informationPower losses in pulsed voltage source inverters/rectifiers with sinusoidal currents
ree-wheeling diode Turn-off power dissipaion: off/d = f s * E off/d (v d, i LL, T j/d ) orward power dissipaion: fw/t = 1 T T 1 v () i () d Neglecing he load curren ripple will resul in: fw/d = i Lavg
More informationChapter 14: Bandpass Digital Transmission. A. Bruce Carlson Paul B. Crilly 2010 The McGraw-Hill Companies
Communicaion Sysems, 5e Chaper 4: Bandpass Digial Transmission A. Bruce Carlson Paul B. Crilly The McGraw-Hill Companies Chaper 4: Bandpass Digial Transmission Digial CW modulaion Coheren binary sysems
More information13.1 Analog/Digital Lowpass Butterworth Filter
CHAPTER 3 IIR FILTER DESIGN 3. Analog/Digial Lowpass Buerworh Filer This docuen designs a lowpass digial IIR filer of he Buerworh ype. A bilinear ransforaion is perfored o creae a digial filer fro he analog
More informationDisribued by: www.jameco.com 1-800-831-4242 The conen and copyrighs of he aached maerial are he propery of is owner. 16K-Bi CMOS PARALLEL E 2 PROM FEATURES Fas Read Access Times: 200 ns Low Power CMOS
More informationTechnology Trends & Issues in High-Speed Digital Systems
Deailed comparison of dynamic range beween a vecor nework analyzer and sampling oscilloscope based ime domain reflecomeer by normalizing measuremen ime Sho Okuyama Technology Trends & Issues in High-Speed
More informationAccurate Tunable-Gain 1/x Circuit Using Capacitor Charging Scheme
Accurae Tunable-Gain 1/x Circui Using Capacior Charging Scheme Byung-Do Yang and Seo Weon Heo This paper proposes an accurae unable-gain 1/x circui. The oupu volage of he 1/x circui is generaed by using
More informationRITEC, Inc. 60 Alhambra Rd., Suite 5 Warwick, RI (401) FAX (401) Powerful Ultrasonic Research Tool. A Modular Approach
RITEC RAM-5 Versaile Compuer Conrolled Ulrasonic Sysem: Modular Approach allows Cusomizaion o Specific Experimenal Requiremens. High Power RF Burs Oupus as high as 5 kilowas for frequencies o 7 MHz. Three
More informationPhase-Shifting Control of Double Pulse in Harmonic Elimination Wei Peng1, a*, Junhong Zhang1, Jianxin gao1, b, Guangyi Li1, c
Inernaional Symposium on Mechanical Engineering and Maerial Science (ISMEMS 016 Phase-Shifing Conrol of Double Pulse in Harmonic Eliminaion Wei Peng1, a*, Junhong Zhang1, Jianxin gao1, b, Guangyi i1, c
More informationSensing, Computing, Actuating
Sensing, Compuing, Acuaing Sander Suik (s.suik@ue.nl) Deparmen of Elecrical Engineering Elecronic Sysems INDUCTIE SENSOS (Chaper.5,.6,.0, 5.4) 3 Inducive sensors damping conrol wheel speed sensor (ABS)
More informationAnalog Baseband Communication Systems. Digital Baseband Communication Systems
EE 421: Communicaions I Dr. Mohammed Hawa Inroducion o Digial Baseband Communicaion Sysems For more informaion: read Chapers 1, 6 and 7 in your exbook or visi hp://wikipedia.org/. Remember ha communicaion
More informationDouble Edge Class BD Hybrid DPWM Implementation Using Linearized LBDD Algorithm
Double Edge Class BD Hybrid DPWM Implemenaion Using Linearized LBDD Algorihm Jacek Jasielski, Sanisław Kua, Wiold Machowski, Ireneusz Brzozowski Deparmen of Elecronics AGH Universiy of Science and Technology
More informationPLL Hardware Design and Software Simulation using the 32-bit version of SystemView by ELANIX Stephen Kratzet, ELANIX, Inc.
Applicaion Noe AN14A Apr 8, 1997 SysemView B Y E L A N I X PLL Hardware Design and Sofware Simulaion using he 32-bi version of SysemView by ELANIX Sephen Kraze, ELANIX, Inc. Inroducion This applicaion
More informationMX629. DELTA MODULATION CODEC meets Mil-Std DATA BULLETIN. Military Communications Multiplexers, Switches, & Phones
DATA BULLETIN MX629 DELTA MODULATION CODEC mees Mil-Sd-188-113 Feaures Mees Mil-Sd-188-113 Single Chip Full Duplex CVSD CODEC On-chip Inpu and Oupu Filers Programmable Sampling Clocks 3- or 4-bi Companding
More informationLecture 11. Digital Transmission Fundamentals
CS4/MSc Compuer Neworking Lecure 11 Digial Transmission Fundamenals Compuer Neworking, Copyrigh Universiy of Edinburgh 2005 Digial Transmission Fundamenals Neworks consruced ou of Links or ransmission
More informationOptical phase locked loop for transparent inter-satellite communications
Opical phase locked loop for ransparen iner-saellie communicaions F. Herzog 1, K. Kudielka 2,D.Erni 1 and W. Bächold 1 1 Communicaion Phoonics Group, Laboraory for Elecromagneic Fields and Microwave Elecronics,
More informationChapter 1: Introduction
Second ediion ober W. Erickson Dragan Maksimovic Universiy of Colorado, Boulder.. Inroducion o power processing.. Some applicaions of power elecronics.3. Elemens of power elecronics Summary of he course.
More informationMicrowave Transistor Oscillator Design
Tuorial on Modern Ulra Low Noise Microwave Transisor Oscillaor Design olumbia Universiy Sepember, 9 Ulrich L. Rohde, Ph.D.* hairman Synergy Microwave orp. *Prof. of RF ircui and Microwave ircui Design
More informationLecture #7: Discrete-time Signals and Sampling
EEL335: Discree-Time Signals and Sysems Lecure #7: Discree-ime Signals and Sampling. Inroducion Lecure #7: Discree-ime Signals and Sampling Unlike coninuous-ime signals, discree-ime signals have defined
More informationDimensions. Transmitter Receiver ø2.6. Electrical connection. Transmitter +UB 0 V. Emitter selection. = Light on = Dark on
OBE-R-SE Dimensions Transmier.. 7.5 9..5.8 4.9 4 5 M 8.9 7.5 9..5.8 4 5 M 8.9 ø.6 ø.6 Model Number OBE-R-SE Thru-beam sensor wih m fixed cable Elecrical connecion Transmier Feaures BN +UB WH IN Ulra-small
More information6.776 High Speed Communication Circuits Lecture 17 Noise in Voltage Controlled Oscillators
6.776 High Speed Communicaion Circuis Lecure 7 Noise in Volage Conrolled Oscillaors Michael Perro Massachuses Insiue o Technology April, 005 Copyrigh 005 by Michael H. Perro VCO Noise in Wireless Sysems
More informationECS455: Chapter 4 Multiple Access
Spread specrum (SS) ECS455: Chaper 4 Muliple Access Dr.Prapun Suksompong prapun.com/ecs455 4.3 DS/SS Oice Hours: BKD, 6h loor o Sirindhralai building Tuesday 4:20-5:20 Wednesday 4:20-5:20 Friday 9:5-0:5
More informationThe Delay-Locked Loop
A Circui for All Seasons Behzad Razavi The Delay-Locked Loop Delay-locked loops (DLLs) can be considered as feedback circuis ha phase lock an oupu o an inpu wihou he use of an oscillaor. In some applicaions,
More informationDimensions. Transmitter Receiver ø2.6. Electrical connection. Transmitter +UB 0 V. Emitter selection. = Light on = Dark on
OBE-R-SE Dimensions Transmier.. 7.5 9..5.8 4.9 4 5 M 8.9 7.5 9..5.8 4 5 M 8.9 ø.6 ø.6 Model Number OBE-R-SE Thru-beam sensor wih m fixed cable Elecrical connecion Transmier Feaures BN +UB WH IN Ulra-small
More informationDimensions. Model Number. Electrical connection emitter. Features. Electrical connection receiver. Product information. Indicators/operating means
OBE-R-SE Dimensions.8.8 ø..75 7.5 6. 5 6.7 4.9 4. 5.9 ø.6 Model Number OBE-R-SE Elecrical connecion emier Thru-beam sensor wih m fixed cable Feaures 45 cable oule for maximum mouning freedom under exremely
More information3. Carrier Modulation Analog
3. Carrier Modulaion Analog Modulaion is he process of using an informaion signal (such as voice or music) o aler some propery of a higher frequency waveform which can hen be efficienly radiaed by reasonably
More informationPointwise Image Operations
Poinwise Image Operaions Binary Image Analysis Jana Kosecka hp://cs.gmu.edu/~kosecka/cs482.hml - Lookup able mach image inensiy o he displayed brighness values Manipulaion of he lookup able differen Visual
More informationChapter 2: Fourier Representation of Signals and Systems
Tes 1 Review Tes 1 Review Proessor Deepa Kundur Universiy o Torono Reerence: Secions: 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7 3.1, 3.2, 3.3, 3.4, 3.5, 3.6 o S. Haykin and M. Moher, Inroducion o Analog & Digial
More informationREADING ASSIGNMENTS LECTURE OBJECTIVES. Problem Solving Skills. x(t) = cos(αt 2 ) ELEG-212 Signal Processing and Communications
ELEG- Signal Processing and Communicaions Lecure 5 Periodic Signals, Harmonics & ime-varying Sinusoids READING ASSIGNMENS his Lecure: Chaper 3, Secions 3- and 3-3 Chaper 3, Secions 3-7 and 3-8 Lab sars
More informationDevelopment of Temporary Ground Wire Detection Device
Inernaional Journal of Smar Grid and Clean Energy Developmen of Temporary Ground Wire Deecion Device Jing Jiang* and Tao Yu a Elecric Power College, Souh China Universiy of Technology, Guangzhou 5164,
More information