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LA72912V Datasheet(PDF) 6 Page - ON Semiconductor |
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LA72912V Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 8 page LA72912V No.A1409-6/12 Block Diagram and Application Circuit Exanple1 Modulation (Outside camera) 1 2 3 4 5 7 8 REG VD-IN VD : Hi FM-OUT VCC(5V) FM-stop 12dB-AMP Video-Mute Main Emphasis -6dB Clamp MOD/DEMOD Control 9 FM-AGC(ON/OFF) D-LIM FM-MOD LPF FM-AGC-DET Main De-Emph 24 23 22 21 20 17 MOD : Hi DEMOD : Lo → 5V Doc-DET (Doc-LO) Standby Control A-GND A-VCC Video-IN FM-DEMOD/LPF 19 18 LPF 6 FF 10 11 12 16 15 14 13 LPF ASK-AGC DET ASK-AGC/ASK-RX /Comparator D-GND LPF VCC(5V) ASK-VCC FM-Stop,Polarity E(VD) & A(SW) TC1 TC2 Amp(ON/OFF) ASK-TX /Modulator BPF ASK-DATA IN (Hi : CAR-OFF) ASK-CAR IN ASK-TX OUT Standby SW (Lo : FM-OFF) (Hi : FM-ON) ASK-RX IN ASK-AGC Filter (OFF : 4.5V) ASK-RX Filter ASK-RX OUT (Hi : CAR having) VDD Emphasis Monitor *2 *2 *1 *1 *1: Open collector Output *2: Push-Pull Output Outside camera SW 2nd-call : Lo Application Circuit Exanple2 Demodulation (Inside monitor) 1 2 3 4 5 7 8 REG FM-IN Video-OUT VCC(5V) FM-stop 12dB-AMP Video-Mute Main Emphasis -6dB Clamp MOD/DEMOD Control 9 FM-AGC(ON/OFF) D-LIM FM-MOD LPF FM-AGC-DET Main De-Emph 24 23 22 21 20 17 MOD : Hi DEMOD : Lo → GND Doc-DET (Doc-LO) Standby Control A-GND A-VCC FM-DEMOD/LPF 19 18 LPF 6 FF 10 11 12 16 15 14 13 LPF ASK-AGC DET ASK-AGC/ASK-RX /Comparator D-GND LPF VCC(5V) ASK-VCC FM-Stop,Polarity E(VD) & A(SW) TC1 TC2 Amp(ON/OFF) ASK-TX /Modulator BPF ASK-DATA IN (Hi : CAR-OFF) ASK-CAR IN ASK-TX OUT Standby SW (Lo : FM-OFF) (Hi : FM-ON) ASK-RX IN ASK-AGC Filter (OFF : 4.5V) ASK-RX Filter ASK-RX OUT (Hi : CAR having) VDD *2 *2 *1 *1 *1: Open collector Output *2: Push-Pull Output FM-AGC OFF (OFF : 4.5V) DOC-OUT FM-OUT Control (ON/OFF) (FM-OUT) |
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