DOUBLE BALANCED MODULATION / DEMODULATION

Transcription

1 NJM9 DOUBLE BALANCED MODULATION / DEMODULATION! GENERAL DESCRIPTION! PACKAGE OUTLINE The NJM9 is a double balanced modulation/demodulation circuit, applied to suppressed carrier modulation, amplitude modulation, synchronous detection, FM or PM detection circuit. Single input voltage and simplification of external circuit offers wider applications. NJM9M! FEATURES " Operating Voltage. to 9V " Excellent Carrier Suppression " Simplification of External Circuit " Bipolar Technology " Package Outline DMP, SSOP NJM9V! BLOCK DIAGRAM NC CARRIER INPUT BYPASS SIGNAL INPUT OUTPUT OUTPUT GND BLOCK DIAGRAM - -

2 NJM9! ABSOLUTE MAXIMUM RATINGS (Ta= C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V +. V Power Dissipation P D (SSOP-), (DMP-) mw Operating Temperature T o p r - to + C Storage Temperature T s t g - to + C Output Drive Current I d ma! RECOMMENDED OPERATIONAL CONDITION (Ta= C) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Supply Voltage V V! ELECTRICAL CHARACTERISTICS (Ta= C,V + =.V) PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT Current Consumption I c c No Signal - ma Conversion Gain note() G c note() db Signal Leakage Level note() L s note() db Carrier Leakage Level note() L c note() db Intermodulation note() I M D note () db Resistance R s - - Ω Capacitance C s note () -. - pf Resistance R c - - Ω Capacitance C c note () -. - pf Output Resistance R o OUTPUT terminal - - Ω Output Capacitance C o OUTPUT terminal note () -. - pf Notes : () Input signal : =.MHz, mvrms(-dbm) Carrier signal : =.MHz,mVrms(-dBm) Desired output signal : fundamental carrier upper-sideband output, Fd=MHz () Input signal : =.MHz,.mVrms(-.dBm) Input signal : =.MHz,.mVrms(-.dBm) Carrier signal : =.MHz,mVrms(-dBm) () The ratio of desired output signal level to input signal level () The ratio of output signal at input signal frequency to desired output signal () The ratio of output signal at carrier signal frequency to desired output signal () The ratio of 9.MHz Intermodulation signal to desired output signal () Measured at MHz - -

3 NJM9! MEASUREMENT CIRCUIT " Emitter - follower Output Items for measurement : Conversion Gain, Signal Leakage Level, Carrier Leakage Level, Intermodulation Measured at OUTPUT (pin ) () Ω Ω Spectrum Analyzer (Rin=Ω) () Ω.uF TEST CIRCUIT " Collector Output Items for measurement : Current Consumption Measured at OUTPUT (pin) () Ω Ω.kΩ Spectrum Analyzer (Rin=Ω) () Ω Ω A.uF TEST CIRCUIT Notes : ()Impedance-matching resistor - -

4 NJM9! TERMINAL FUNCTION (Ta= C,V + =.V) Pin No. SYMBOL EQUIVARENT CIRCUIT VOLTAGE FUNCTION V + V Power Supply. Collector Output. OUTPUT.V + OUTPUT.V Emitter Output. Since there is no internal resistor to the ground, emitter current may be obtained by connecting an external resistor. This terminal voltage is obtained with a Ω external resistor. Ground. GND -- Terminal. SIGNAL INPUT.V BYPASS.V Common base lead of two differential circuits. This terminal should be connected externally to AC ground. Terminal. CARRIER INPUT.V NC -- No Connect. The NC terminal is not connected to internal circuit so that this terminal can be open or grounded. - -

5 NJM9! APPLICATION CIRCUIT " Emitter - follower output Cs Rc= Ω Cb Cc Ii RL Emitterfollower Output RL~ -. Ii Ground or.uf APPLICATION CIRCUIT " Collector output Cs Cc Cb Rc= Ω Collector Output Ground or.uf APPLICATION CIRCUIT " The impedance of AC coupling capacitor connected to input / output terminals should be adequately low at the frequency of input / output signals, respectably. " The impedance of base-coupling capacitor connected to BYPASS terminal should be adequately low against the both of input/output signals to keep better performance on leakage and distortion characteristics. " In case of APPLICATION CIRCUIT, idle (emitter) current may be supplied by adding an external resistor between OUTPUT (pin) and ground. The relation of idle current Ii and external resistance RL is determined by : RL~ -. Ii! Note that there is some degradation in intermodulation characteristics with increasing the external resistance RL, or decreasing a load impedance of Emitter-follower output. " The level of output signal comes constant at carrier input signal level over mv ( see Typical Characteristics). - -

6 NJM9! HOW TO DECREASE LEAKAGE LEVEL By adjusting DC bias of SIGNAL INPUT terminal, carrier leakage level may be decreased. By adjusting DC bias of CARRIER INPUT terminal, signal leakage level may be decreased. In actual circuit, it can be seen the case that either of these adjustment is provided, not both. Singal Input kω kω kω kω Variable Resistor for Carrier Leakage Level Adjustment Variable Resistor for Signal Leakage Level Adjustment LEAKAGE ADJUSTMENT CIRCUIT! EVALUATION PC BOARD The evaluation PC board shown in next page is useful for your design and is intended to have more understanding of the usage and performance of this device. Two kinds of board are prepared for two packages, SSOP and DMP, respectively. Each board can be applied to two kinds of circuit, emitter-follower output type and collector output type, as shown below. This circuit is the same as MEASUREMENT CIRCUIT. For other electrical conditions, it should be necessary to reconsider each value of components, especially of capacitance. Note that this board is not prepared to show the recommendation of pattern and parts layout. Emitter - follower output () () Ω () () () Ω () () RL ().uf Output Collector output () () Ω () (9) () () Ω.kΩ Output () () () Ω (Ω) Ω A ().uf - -

7 NJM9 Evaluation PC Board Component Placement View Emitter - follower output SIGNAL INPUT OUTPUT Ω Ω NJM9 RL CARRIER INPUT.uF GND VCC Collector output SIGNAL INPUT Ω Ω NJM9 9 Ω.Ω Ω CARRIER INPUT.uF OUTPUT GND VCC - -

8 NJM9! TYPICAL CHARACTERISTICS ( Ta= C,V + =.V, unless otherwise noted ) Operating Current Icc (ma) Operating Current versus Supply Voltage (TEST CIRCUIT, No input signal) pin Output Voltage versus Supply Voltage (TEST CIRCUIT, No input signal). pin Output Voltage (V) pin Output Voltage versus Supply Voltage (TEST CIRCUIT, No input signal) // pin Output Voltage versus Supply Voltage (TEST CIRCUIT, No input signal). pin Output Voltage (V) // pin Output Voltage Conversion Gain Gc (db) Signal Leakage Level Ls (db) Conversion Gain versus Supply Voltage (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm) 9 Signal Leakage Level versus Supply Voltage (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm) 9 Intermodulation IMD (db) Carrier Leakage Level Lc (db) Intermodulation versus Supply Voltage (TEST CIRCUIT, =.MHz/-.dBm,=MHz/-.dBm, =.MHz/-dBm) Carrier Leakage Level versus Supply Voltage (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm)

9 NJM9! TYPICAL CHARACTERISTICS ( Ta= C,V + =.V, unless otherwise noted ) OUTPUT Level (db) OUTPUT Level note() versus Carrier Frequency (TEST CIRCUIT, =.MHz/-dBm, = to MHz/-dBm) Carrier Signal Frequency (MHz) OUTPUT Level (db) OUTPUT Level note() versus Input Signal Frequency (TEST CIRCUIT, = to MHz/-dBm, =./-dbm) Input Signal Frequency (MHz) OUTPUT Level (db) OUTPUT Level (dbm) OUTPUT Level note() versus Carrier Frequency (TEST CIRCUIT, =.MHz/-dBm, = to MHz/-/-/dBm) =dbm - =-dbm - - =-dbm Carrier Signal Frequency (MHz) OUTPUT Level versus Input Signal Level (TEST CIRCUIT, =.MHz, =.MHz/-dBm) Input Signal Level L- (dbm) Note : () OUTPUT level (db): the ratio of OUTPUT Level to input signal level. OUTPUT Level (dbm) OUTPUT Level versus Carrier Signal Level (TEST CIRCUIT, =.MHz/-dBm, =.MHz) Carrier Signal Level L- (dbm) OUTPUT Level (dbm) OUTPUT Level versus Input Signal Level (TEST CIRCUIT, =.MHz, =MHz =.MHz/-dBm) IMD Input Signal Level L- (dbm) - 9 -

10 NJM9! TYPICAL CHARACTERISTICS ( Ta= C,V + =.V, unless otherwise noted ) Operating Current Icc (ma) pin Output Voltage (V) Conversion Gain Gc (db) Signal Leakage Level Ls (db) Operating Current versus Ambient Temperature (TEST CIRCUIT, No input signal) - - pin Output Voltage versus Ambient Temperature (TEST CIRCUIT, No input signal) Conversion Gain versus Ambient Temperature (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm) - - Ambient Temperature Ta( C) Signal Leakage Level versus Ambient Temperature (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm) pin Output Voltage (V) // pin Output Voltage (V) Intermodulation IMD (db) Carrier Leakage Level Lc (db) pin Output Voltage versus Ambient Temperature (TEST CIRCUIT, No input signal) // pin Output Voltage versus Ambient Temperature (TEST CIRCUIT, No input signal) - - Ambient Temperatue ( C) Intermodulation versus Ambient Temperature (TEST CIRCUIT, =.MHz/-.dBm,=MHz/-.dBm, =.MHz/-dBm) Carrier Leakage Level versus Ambient Temperature (TEST CIRCUIT, =.MHz/-dBm, =.MHz/-dBm)

11 NJM9 [CAUTION] The specifications on this databook are only given for information, without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. - -