LA75676V-S 데이터 시트보기 (PDF) - SANYO -> Panasonic

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LA75676V-S

VIF/SIF IF Signal-Processing Circuit for TV and VCR Products

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin

LA75676V-S

Function

IF AGC filter connection

15

The AGC voltage is created by smoothing the signal

16

AGC filter

that results from peak detection by the AGC detector

at pins 17 (first AGC), and 15 and 16 (second AGC).

17

The video signal input to this IF AGC detector is a

signal that was passed through the audio trap circuit.

Equivalent circuit

15

1.8kΩ

16

17

4.7kΩ

A13279

18

VIF amplifier input

18

VIF input

The input circuit is a balanced input, and its input

impedance is due to the following component values.

19

19

R ≈ 1.5 kΩ

C ≈ 3 pF

20

GND

A13280

4.2V

RF AGC adjustment

21

RF AGC VR

This pin sets the tuner's RF AGC operating point. Both

the FM output and the video output can be muted by

setting this pin to the ground level.

20kΩ

20kΩ

560Ω

21

A13281

Continued on next page.

No. 6277-10/13

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