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SINGLE REFERENCE

MIXER AND

AM DEMODULATOR

VCO TWD

AFC DETECTOR

TUNER AND VIF-AGC

FPLL

VIDEO DEMODULATOR

AND AMPLIFIER

SIF

AMPLIFIER

SIF-AGC

INTERNAL VOLTAGE

STABILIZER

FM DETECTOR (PLL)

AF AMPLIFIER

VIF AMPLIFIER

SIF

VIF

TDA9814T

26

24

23

7

6

8

18

19

13

10

11

20

21

22

5

16

25

4

3

2

1

28

27

5 V

VP

1/2

CSAGC

CVAGC

standard

switch

917

15

5.5

5.74

SIF

14

12

AF2

FM DETECTOR (PLL)

AF AMPLIFIER

AF1

VIDEO

BUFFER

Vi(vid)

CVBS

2 V (p-p)

video

1 V (p-p)

AFC

2 x f PC

tuner

AGC

loop

filter

TOP

CBL

MED858 - 3

L/L accent

switch

Fig.1 Block diagram.