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NTE1775 Integrated Circuit PIF Subsytem for TV Receiver
Description: The NTE1775 is a picture IF subsystem that provides 3-stage IF amplifier, Video Detector, black and white noise inverting circuits and AFT detector for a TV receiver. The NTE1775 also provides internal fast response AGC with dual time constants for the IF amplifier stages and delayed AGC for an external RF amplifier stage. It is designed for FET top front-end (reverse AGC). Features: D High Input Sensitivity 3-Stage IF Amplifier: 58.75MHz 100VRMS Type D Gain Reduction with Excellent Stability: Reduction Range 65dB Typ D Video Detector with Linear Characteristics D Black and White Noise Inverting Circuits D Balanced AFT Output D Improved Fast AGC Response D Delayed AGC Output for a Front-End FET Top Front-End D Minimal External Components and Adjustments Required Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage (Pin11), VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Open Loop Voltage (Pin14), V14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V Video DC Output Current (Pin12), I12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6mA Power Dissipation , PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.4W Derated Above 25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2mW/C Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +65C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +150C
Electrical Characteristics: (TA = +25C unless otherwise specified)
Parameter Recommended Supply Voltage Supply Current Video DC Output Voltage AFT DC Output Voltage Symbol VCC ICC V12 V5 V6 AFC Output Offset Voltage RF AGC Residual Output Voltage RF AGC Leakage Current Video Sensitivity AGC Range Sync Tip Level Voltage Maximum Input Voltage White Noise, Threshold Level White Noise, Clamp Level Black Noise, Threshold Level Black Noise, Clamp Level Video Frequency Response Carrier Suppression 2nd Carrier Suppression A (IF) VSYNC VW TH VW CL VB TH VB CL fBW CL I2nd I920 DP DG RIN CIN AFT Sensitivity AFT Output Upper Voltage AFT Output Lower Voltage Maximum Available Current f = 58.75MHz V5, V6 U f = 58.75MHz V5, V6 L f - 58.75MHz I4 Max f = 58.75MHz Between Pin1 and Pin16 V5-V6 V4 SAT VCC = 12V VCC = 12V VCC = 12V, SW1: ON, SW2: ON VCC = 12V, SW1: ON, SW2: ON VCC = 12V, SW1: ON, SW2: ON VCC = 12V, SW3: 2, SW4: 1 VCC = 12V, V12 = 0.8VP-P, fp = 58.75MHz, AM: 30% VCC = 12V, fp = 58.75MHz, V14 = 11.5V to 4.0V VCC = 12V, fp = 58.75MHz VCC = 12V, fp = 58.75MHz VCC = 12V, fp = 58.75MHz VCC = 12V, fp = 58.75MHz VCC = 12V, fp = 58.75MHz f = 58.75MHz, Sweep Generator SG1 = 100mVrms, SG2, SG3: OFF SG1 = 100mVrms, SG2, SG3: OFF SG1 = 100mVrms, SG2 = 32mVrms, SG3 = 32mVrms Test Conditions Min 10.8 42 5.2 5.3 5.3 -1.5 - - 50 60 2.3 100 6.0 3.7 1.4 2.9 4.5 40 40 33 - - 3.0 - - 11.7 1.8 0.3 Typ 12.0 51 5.5 6.8 6.8 0 - - 100 65 2.5 120 6.4 4.1 1.6 3.3 5.5 50 50 38 3.5 7 4.5 2.0 16 11.9 2.3 - Max 13.2 63 5.8 8.3 8.3 +1.5 0.5 1.0 220 - 2.7 - 6.8 4.5 1.8 3.7 - - - - 5.0 10 6.0 5.0 - 12.0 2.8 - Unit V mA V V V V V A Vrms dB V mVrms V V V V MHz dB dB dB deg % k pF kHz/V V V mA
I4 LEAK VCC = 12V, SW3: 1, SW4: 1
VIN Max VCC = 12V, fp = 58.75MHz
920kHz Carrier Beat Suppression Differential Phase Differential Gain Input Impedance
Pin Connection Diagram
IF Input Coupling Cap RF/AGC Delay RF/AGC Output AFT 1 AFT 2 AFT Tank Video Tank
1 2 3 4 5 6 7 8
16 IF Input 15 Coupling Cap 14 AGC Filter 13 GND 12 Video Output 11 VCC 10 AFT Tank 9 Video Tank
16
9
1
8
.870 (22.0) Max
.260 (6.6) Max .200 (5.08) Max
.100 (2.54) .700 (17.78)
.099 (2.5) Min

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