TDA4472-A 데이터 시트보기 (PDF) - Temic Semiconductors

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TDA4472-A

Video-IF (VIF) with FPLL Demodulation and Quasi Parallel Sound (QPS) Processing

Temic Semiconductors 

TDA4472-A

TELEFUNKEN Semiconductors

Offset

comp.

(optional)

Loop

filter

VCO

ÏÏAFC

switch

Ï26

FPL

L

VIF

CAGC

VIF amp

67ÏÏÏ

8

Ï AGC

Ï (VIF)

Ï ÏÏ Ï 18

20

21

0°

VCO

+

90° phase shift

Video

det.

ÏÏ19

ÏÏ AFC

22

AFC

ÏÏ12

Video

Ï4,9,16

Tuner

11

ÏÏÏ10

Tuner

AGC

Take over point

SIF 2

Ï Input switch

22783ÏÏÏÏÏÏ

SIF 1

12ÏÏÏ

5

ÏÏ CAGC

SIF amp

AGC

(SIF)

FM det.

Supply

Ï ÏÏ 23

VS

Ï17

CRef

Ï24

Intercarrier

(FM / NICAM)

94 8719

Figure 1. Block diagram

2 (14)

Rev. A1: 26.07.1995

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