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QSS MIXER

INTERCARRIER MIXER

AM DEMODULATOR

SIF AMPLIFIER

SIF

AGC

intercarrier

mode

INTERCARRIER

MODE SWITCH

FM-PLL

DEMODULATOR

9

mute

switch

standards

selection

switch

CSAGC

Cde-em

Vde-em

CDEC

13

FMin

QSS

STD

12

5

10

11

audio

video

CVBS

1 V (p-p)

1.1 V (p-p)

8

16

20

21

17

18

19

6

4

22

AFC

AF

2

× fpc

L/L accent switch

and adjust

TPLL

CVAGC

CBL

TOP

LADJ VCO2

VCO1

VP

GND

VIF AMPLIFIER

FPLL

VIF

SAW

SIF

SAW

24

23

2

1

14

VCO

TWD

5.5 MHz

VIDEO

DEMODULATOR

AND AMPLIFIER

SOUND

TRAP

AFC

DETECTOR

VOLTAGE

REFERENCE

TUNER

AGC

TAGC

VIF1

VIF2

SIF1

SIF2

VIF

AGC

TDA9817

TDA9818

MHA663

Fig.1 Block diagram.

(1) Not connected for TDA9817T and TDA9817TS.