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NJM2186

PRELIMINARY

DOLBY S-TYPE NOISE REDUCTION PROCESSOR

s

PACKAGE OUTLINE

s

GENERAL DISCRIPTION

The

NJM2186

is a stereo Dolby S-type noise reduction

processor. It applies to stereo system on 1 chip because it

includes dual channel circuit.

The

NJM2186

contains all of necessary block for decoding

operation, and it also performs encoding operation by connecting

two external operational amplifiers.

+ -

The feature of minimum operating voltage from 7.5V(V /V =

鹵3.75V)is

most suitable for car audio applications.

(NOTE) Dolby and double-D symbol are trademarks of Dolby Laboratories Licensing Corporation.

San Francisco, CA94103-4813. USA.

This device is available only to licensees of Dolby Lab.

Licensing and application information may be obtained from Dolby Lab.

NJM2186FG1

s

FEATURES

qOperating

Voltage

( +7.5 or 鹵3.75 V min )

qDolby

Level

(-6dBm=388mVrms)

qStereo

system on 1 chip

qFew

external parts

qBipolar

Technology

qPackage

Outline

TQFP64

s

BLOCK DIAGRAM

48

47

46

45

44

43

42

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40

39

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37

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35

34

33

ANTSAT

49

32

RECT

50

INTG

NL

RECT

INTG

NL

31

51

RECT

52

INTG

NL

RECT

INTG

NL

TO RECT

MC

30

29

53

HHF filter

54

HHS filter

55

LHS filter

HLF filter

RECT

INTG

NL

LHF filter

28

27

26

56

BIAS

57

Bch

Ach

HLF filter

RECT

INTG

NL

25

24

58

HHS filter

59

HHF filter

60

LHF filter

LHS filter

23

22

21

61

TO RECT

RECT

62

INTG

NL

RECT

INTG

NL

MC

20

19

63

RECT

INTG

NL

RECT

INTG

NL

18

64

ANTSAT

17

1

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