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 

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Pin No.

Pin

LA75676V-S

Function

Bandpass filter output

22

BPF-out

The output to the external bandpass filter is passed

through an internal 6 dB amplifier before being output.

Equivalent circuit

200Ω

22

A13282

Filter that holds the FM detector output DC voltage

fixed.

Normally, a 1 µF electrolytic capacitor is used. If the

23

FM filter

low band (around 50 Hz) frequency characteristics are

of concern, this value should be increased. The FM

detection output level can be reduced and the FM

dynamic range improved by inserting the resistor R in

series with the capacitor between pin 23 and ground.

1kΩ 1kΩ

23

R

C

+

A13283

Audio FM detector output

This is an emitter-follower circuit with a 300 Ω resistor

inserted in series.

• Stereo applications

In some application that provide input to a stereo

decoder, the input impedance may be reduced,

24

FM detector output

resulting in distortion in the L-R signal and degraded

stereo characteristics. If this problem occurs, add a

R2

24

300Ω

resistor between pin 24 and ground.

R1 ≥ 5.1 kΩ

C

R1

10kΩ

• Mono applications

Construct an external deemphasis circuit.

t = CR2

A13284

No. 6277-11/13

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