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MHB429

FM DEMODULATOR

NARROW-BAND PLL

SC2

FM DEMODULATOR

NARROW-BAND PLL

SC1

AF

AMPLIFIER

2

AF

AMPLIFIER

1

LF2

18

4, 5, 9, 11, 12,

16, 17, 19, 20,

22, 23, 36, 44

LPF

31

CID

35

CTRIG

34

25

AFR

13

CAF2

26

DIGITAL

ACQUISITION

OSCILLATOR

CLOCK

STEREO DECODER

STEREO ADJUST

B/G, D/K, I, M (Korea)

STANDARD

AF SWITCH

DIGITAL

IDENTIFICATION

PILOT

NARROW-BAND PLL

SDA

30

SCL

29

P1

37

P2

42

TRANSCEIVER

XTAL

4 MHz

15

CAF1

24

TDA9873H

loop filter

14

LF1

3

CDE1

6

CDE2

38

EXTM

M

39

EXTR

R

mono

stereo

40

EXTL

L

8

AF1I

AF2I

32

10

33

AF1O AF2O

loop filter

IFINT

n.c.

DGND

27

MAD

21

POWER

SUPPLY

AGND

OUTM

7

VCC

Vref

28

41

43

IF

intercarrier

input

4.5, 5.5, 6.0, 6.5

4.72, 5.74, 6.26,

6.74 MHz

pilot

loop

external AF

OUTR

2

OUTL

1

Fig.1 Block diagram.