LA75691 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LA75691

IF Signal-Processing IC for PAL/NTSC Multichannel Audio TV and VCR Systems

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin

LA75691

Function

Equivalent circuit

IF AGC filter connection

The AGC voltage is created at pin 17 from the peak detection

output produced by the internal AGC detector. A second

17

IF AGC FILTER

AGC filter (a lag-lead filter) is built in the IC to create a dual

time constant.

Use a 0.022-µF capacitor as the external capacitor. Adjust

the value of the capacitor to compensate for sag, or modify

the AGC speed as required.

VIF amplifier input

18

VIF input

The input circuit is a balanced input and the input impedance

corresponds to:

19

R ≈ 1.5 kΩ and

C ≈ 3 pF.

20

GND

RF AGC trimmer connection

21

RF AGC VR

This pin is used to set the tuner RF AGC operating point. The

FM and video outputs can be muted at the same time by

shorting this pin to ground.

22

NC

Continued on next page.

No. 5734-10/13

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