LA7566 查看數據表（PDF） - SANYO -> Panasonic

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LA7566

VIF/SIF IF Signal-Processing Circuit with TV/VCR PAL and NTSC Multisound Support

SANYO -> Panasonic 

Pin Functions

Pin No.

Symbol

LA7566

Pin function

Equivalent circuit

• Audio FM detector output.

Deemphasis is switched internally in the IC. (5 kΩ and 7.5 kΩ)

1

FM DET OUT

This switching is linked to the SIF input switch. An external

emitter-follower circuit must be provided if the deemphasis is

disabled.

• Connection for a filter that holds the FM detector output DC

2

SIF FILTER

voltage at a fixed level. Normally, a 1-µF electrolytic capacitor is

used. To improve the low band (around 50 Hz) frequency

characteristics, increase the value of this capacitor (C1).

• VIF amplifier input.

5

VIF IN

The input circuit is constructed as a balanced input, and the

input has the following impedance characteristics:

6

R ≈ 1.5 kΩ

C ≈ 3 pF

Continued on next page.

No. 5764-6/11

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