
VIF/SIF
LA7567BM/BVA 
Overview
The LA7567MB and LA7567BVA are PAL/NTSC
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment process. PLL detection is adopted for FM detection to handle audio multipath detection. These ICs include a
These products provide improved video and audio
Functions and Features
VIF amplifier | AGC |
PLL detector | Multi SFI converter |
BNC | Limiter amplifier |
RF AGC | PLL FM detector |
Equalizer amplifier | The AFT and SIF require no coils and are adjustment free |
AFT | PAL/NTSC multiformat audio systems can be implemented easily |
IF AGC | |
Buzz canceller | VCC = 5 V, |
First SIF | Packages: LA7567BM: MFP24S (300mil) |
First SIF detector | LA7567BVA: SSOP24 (225mil) |
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| Block Diagram |
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| IN PUT |
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| TSF5220 |
| SAW |
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| 9V |
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| RF AGC |
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5.6kΩ |
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| (S) |
| OUT | 30kΩ |
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+ |
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| SAW(P) |
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| 1000pF | 100kΩ |
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AF OUT |
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| GND |
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1∝F |
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| 0.01∝F |
| AFT | |||
(M) |
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| 10kΩ |
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0.015∝F |
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| 0.022∝F 0.01∝F |
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| 100kΩ |
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| RF |
| IF | LIF |
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| AMP |
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| AGC | AGC | AGC | AMP |
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FM |
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DET |
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| VIDEO |
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| AFT |
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| DET |
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| DET |
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| HPF |
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LIM |
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AMP |
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| HPF |
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| MIX |
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| VCO |
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| HPF |
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| EQ |
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| AMP |
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| 1∝F | 10kΩ |
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| 100∝F |
| 0.01∝F |
| 150Ω | 0.47∝F |
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BPF | 330Ω |
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| 560Ω |
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| 15∝H |
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| 330Ω |
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| VCC |
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| 2.2kΩ | GND |
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| VIDEO |
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| OUT |
VIF/SIF
LA75676V/676VA 
Overview
The LA7576V and LA7576VA are NTSC intercarrier VIF/SIF ICs that adopt a partially
The VIF block adopts a technique that makes AFT adjustment unnecessary by adjusting the VCO, thus simplifying the adjustment process. PLL detection is adopted for FM detection.
The supply voltage is the same 5 V used in multimedia systems. In addition, an
Functions and Features
VIF amplifier | Limiter amplifier |
PLL detector | PLL FM detector |
BNC | The AFT and SIF require no coils and are adjustment free |
RF AGC | |
Equalizer amplifier | VCC = 5 V, |
AFT | Packages: LA7576VA: SSOP24 (225mil) |
IF AGC | LA7576V: SSOP24 (275mil) |
Buzz canceller |
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| Block Diagram |
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| RF AGC |
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| 4.5MHz |
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| IN PUT |
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| OUT |
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| OUT |
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| 120k |
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| 10kΩ |
| 1000pF |
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AF OUT | + |
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| 0.01∝F |
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| AFT OUT | ||||
7.5kΩ |
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| SAW(P) |
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0.01∝F | 1∝F |
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| F0.01∝ (M) | F0.015∝ (M) |
| 300pF |
| 1000pF |
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| GND |
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(M) |
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| 6.8kΩ |
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| VCC |
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| 30kΩ |
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FM |
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| RF | IF |
| VIF |
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DET |
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| AMP |
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| AGC | AGC |
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| AFT |
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| VIDEO |
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| 120k |
LIM |
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| DET |
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AMP |
| 6 bB |
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| HPF |
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| EQ |
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| VCO |
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| AMP |
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| 1∝F |
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| 1∝F | 0.01∝F |
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| 0.47∝F | 560Ω |
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BPF | 330Ω |
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4.5 MHz |
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| 15∝H |
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| 330Ω |
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| VCC |
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| 2.2kΩ | GND |
VIDEO OUT
47 SANYO TV . VCR | SANYO TV . VCR 48 |