NTE1790 Integrated Circuit Video IF, Chroma Deflection

Transcription

1 NTE1790 Integrated Circuit Video IF, Chroma Deflection Description: The NTE1790 combines all the functions required for an NTSC color TV system on a 64 Lead DIP shrink type plastic package. This device is designed to have wide application capability, from a fundamental CTV application to a high end MPX CTV with quasi parallel SIF system, with minimal external parts and adjustments. A quasi parallel SIF system assures buzz free sound reproduction. Features: PIF Section 3 Stage Variable Gain PIF Amplifier High Speed Peak AGC with Dual Time Constants Single End AFT Output with Defeat Function A Delayed RF AGC Output (Reverse AGC) Sync Positive Detected Video Output Polarity Internal Black/White Noise Inverter Quasi Parallel Inter Carrier Detector 3 Stage Variable Gain Intercarrier IF Amplifier Independent Peak AGC Intercarrier Detector with 90 deg. Carrier Shifter SIF Section: 3 Stage Limiter Amplifier Differential Peak Detector Separated Detector Output and Electronic Attenuater Input for Multiplex TV Sound Reception Excellent Electronic Attenuater Preamplifier with an NF Terminal Video Section: 2nd Order Picture Sharpness (DC Control) Contrast Control with Uni Color Function Brightness Control with Pedestal Clamping Circuit (Adjustable DC Restoration Ratio) Internal Vertical Blanking Chroma Section: ACC Circuit Color Control Circuit Uni Color Control Circuit Adjustment Free APC Circuit Tint Control Circuit With Sync Pulse Output Color Differential Outputs

2 Deflection Section: Excellent Sync Separator Adjustment Free Count Down System Stable Vertical Synchronization Saw Tooth Type AFC Horizontal Pre Driver X Ray Protector Vertical Drive Amplifier Absolute Maximum Ratings: (T A = +25 C unless otherwise specified) Supply Voltage, V CC V Input Signal Level, e in V p p RF AGC Voltage, V RF AGC V Horizontal Section Supply Voltage, V CC H V Power Dissipation, P D mW Derate Above 25 C mW/ C Operating Temperature Range, T opr to +65 C Storage Temperature Range, T stg to +150 C Recommended Supply Voltage: PIF Section (Pin19) V QIF, SIF Section (Pin37) V Video, Chroma, Deflection Section (Pin16) V Horizontal Section (Pin58) V AC Characteristics: (T A = +25 C, V CC = 9V, 6.8V unless otherwise specified) PIF Section Input Sensitivity v in µv rms IF AGC Gain Reduction GR db Video Bandwidth BW 4.5 MHz Video Ripple 0 ±1 db Differential Phase DP 5 deg. Differential Gain DG 10 % Video White Peak V V Noise Inverter White Inverter V W TH V White Clamp V W CL V Black Inverter V B TH V Black Clamp V B CL V Carrier Suppression 40 db Harmonics Suppression I 2nd 40 db Input Impedance R i PIF kω Input Capacitance C i PIF pf AFT Center Voltage No Signal V Offset ±3 V

3 PIF Section (Cont d) AFT Sensitivity khz/v AFT Voltge Swing A 6 11 V 920kHz Beat I db QIF Section Input Sensitivity v in Q µv rms 4.5MHz Output Level V P P AGC Gain Reduction GR Q db Input Impedance R i QIF kω Input Capacitance C i QIF pf SIF Section Limiting Sensitivity v LIM µv rms Detected Output v OD mv rms AM Rejection AMR 20 db SIF Bandwidth BW SIF khz THD Bandwidth BD THD THD = 1.5% khz Attenuation AC Gain G V ATT db Maximum Attenuation ATT max 70 db AF Amp AC Gain G V AF 18 db Video Section Input Impedance, Pin52 z i kω Input Impedance, Pin53 z i kω Video Output Impedance z o Ω Brightness Control Voltage V BR V Brightness Sensitivity G BR Minimum Linear Video Input V di V Maximum Linear Video Input V di V Video Input Dynamic Range V di V P P Minimum Video Output V do V Maximum Video Output V do V 2nd Order Differential Input Dynamic Range V dip V P P Video Gain G V Frequency Response G f db Contrast Control Voltage Range dvct V Contrast Control Range dgct db Contrast Control Center Voltage V cto V Frequency Response Dependence dg f db Frequency Response at Minimum Picture Control dg ps min db Maximum Control dg ps max db Center Control dg ps db Picture Control Voltage Range dv ps V

4 Video Section (Cont d) Vertical Blanking Pulse Output Level V V V Horizontal Blanking Pulse Detection Level V H V Horizontal Blanking Input Current I H ma Chroma Section ACC Characteristics e a V P P A V P P Demodulator Color Differential Output e R V P P e G V P P e B V P P Color Killer Residual e KR 10 mv e KG 10 mv e KB 10 mv Color Control Residual e CR 10 mv e CG 10 mv e CB 10 mv Color Control Voltage V V Color Control Range dv V Uni Color Control Range e U db Uni Color Control Voltage V V Uni Color Control Range dv V Color Control Phase Change d0 C 5 deg. Uni Color Control Phase Change d0 U 7 deg. Maximum Input of Bandpass Amplifier e M V P P Tint Control Range d deg. Tint Control Range d deg. d deg. Tint Control Voltage V V Tint Control Voltage Range dv V Sync Pulse Width S t 4.5 µs Sync Pulse, High V S V Sync Pulse, Low V S2 3.6 V APC Frequency Control Sensitivity 7.0 Hz/mV APC Pull In Range f P 1.3 Hz APC Hold Range f Hld 2.5 Hz Sweeper Amplitude SEV1 4.0 V SEV2 3.0 V SEV V P P Sweeper Period te ms te ms te ms Killer Level e K mv P P

5 Chroma Section (Cont d) Demod Output DC Voltage R.G.B V Maximum Demod Output E R V P P E G V P P E B V P P Demod Relative Amplitude R/B G/B Demod Relative Phase R B deg. G B deg. Demod Output Residual Carrier ECR 300 mv P P Deflection Section ECG 300 mv P P ECB 300 mv P P Pin57 Input Current I R57 1 µa Sync Signal Delay Time t pdr ns t pdf ns Pin56 Terminal Voltage V V Pin56 Output Current I O µa Gate Pulse Width T pw µs Gate Pulse Delay t pd µs Chroma Sweep Pulse Width T cwt 8H Vertical Masking Pulse (Gate) H to 10.25H Vertical Masking Pulse (Horizontal AFC) H to 10.25H Vertical Sync Integrating Time Constants T VS µs Vertical Retrace Pulse Width T VO55 10H / 11H Vertical Amp Gain G VA db Vertical Amp Input Dynamic Range V i V Vertical Amp Output Dynamic Range V H V V L V Vertical Amp Maximum Output Current I O ma Horizontal 32f H Oscillator Starting Voltage V CC V Horizontal Drive Output Starting Voltage V CC V Horizontal Drive Output Starting Current I CC ma Horizontal Oscillator Frequency f H Hz f H temperature Drift df HT Hz f H V CC Coefficient df HV Hz Horizontal Output Duty T O % Horizontal Output Saturation Voltage V OL V f H Pull In Range df pull ±550 ±750 ±880 Hz f H Hold Range df hold ±550 ±750 ±880 Hz X Ray Sense Voltage V in V X Ray Sense Current I in µa

6 Deflection Section (Cont d) X Ray Protector Recovering Voltage V Hold V Vertical Sync Pull In Range f PV H f PV H Pin Connection Diagram X Ray Protect 1 64 Horiz Driver Output Tint Control f H VCO Color Control f SC VCO f H VCO 32f H VCO Killer Filter 5 60 AFC Time Constant SC f VCO 6 59 Flyback Pulse Input APC Filter 7 58 H V CC (6.8V) Contrast Control 8 57 Sync Sep Input R Y Output 9 56 Sync Sep Time Constant G Y Output Vertical NFB B Y Output Vertical Output GND Video Input Y Output Differential Input Pedestal Clamp Picture Sharpness Brightness GND 9V V CC V/C/D Chroma Input Bypass ACC Filter RF AGC Delay Video Output 9V V CC PIF RF AGC Output PIF Input Video Detector Tank PIF Input Video Detector Tank PIF AGC Time Constant AFT Tank/Defeat PIF AGC Time Constant AFT Output GND MHz Output QIF Input GND QIF Input I/C Detector QIF AGC Time Constant I/C Detector Preamp Output V V CC Q SIF NFB SIF Input Volume Control SIF Bias Audio Input Detector Output FM Detector Tank FM Detector Tank (57.65) Max.236 (6.0) Max.708 (18.0) Min.070 (1.78).106 (2.7) Min.750 (19.0)