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PRESCALER

PROGRAMMABLE

COUNTER

STABILIZER

WINDOW

DETECTOR

LAST-STATION

MEMORY

AM/FM

INDICATOR

IN-LOCK

DETECTOR

FM

DETECTOR

PILOT

DETECTOR

CHARGE

PUMP

MULTIPLEXER

CRYSTAL

OSCILLATOR

SHIFT REGISTER

FM

FRONT-END

FM

OSCILLATOR

FM

IF2

FM

IF1

FM

MIXER

SEQUENTIAL

CIRCUIT

STATUS

REGISTER

AM

FRONT-END

AM

OSCILLATOR

AM

DETECTOR

V/I

CONVERTER

AM

MIXER

AM

IF

AGC

AFC

hard mute

level

PLL

DECODER

MATRIX

SDS

MUTE

up

down

level

RFGND

DATA

BUS-CLOCK

WRITE-ENABLE

FM-RFI

VSTAB(A)

VSTAB(B)

AM-RFI

XTAL

RIPPLE

25

23

1

26

30

31

2

AGC

AM-IFI/O2

AM-MIXER

AMOSC

AM-IFI1

6

40

41

36

44

822

32

20

19

13

15

14

9

12

24

16

18

17

39

37

33

35

35

38

43

42

28

27

29

34

7

21

10

11

4

MO/ST

AFRO

MUTE

AFC(n)

AFC(p)

AFC

VCO

LFI

PILFIL

AFLO

stereo

stereo

mono

38 kHz

19 kHz

FM-IFI1

FM-IFI2

FM-IFO1

FM-MIXER

FMOSC

FM-RFO

VCC1

VDDD

TEA5757;

TEA5759

FM

AM

DGND

P1

P0

TUNE

RFGND

MPXI

AFO

VCC2

IFGND

FSI

FMDEM

MHA111

Fig.1 Block diagram.