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NJW1167/A

AUDIO PROCESSOR with Subwoofer Output

s

GENERAL DESCRIPTION

The

NJW1167/A

is a sound processor with subwoofer

output includes all of functions processing audio signal for

TV, such as tone control, balance, volume, mute, and AGC

functions.

Also the

NJW1167/A

includes the LPF for subwoofer

output and bass boost function.

The original surround system reproduces natural surround

sound and clear vocal orientation.

2

All of internal status and variables are controlled by I C

BUS interface.

s

PACKAGE OUTLINE

NJW1167V

NJW1167AL

s

FEATURES

7.5 to 13V

q

Operating Voltage

NJW1167FJ2

q

3ch Output(Lch, Rch, Subwoofer ch) / 2ch Output(Lch, Rch)

q

LPF Filter (Adjustable cut off frequency by external parts)

q

AGC Circuit (It reduces volume difference among input sources.)

2

Adjustable AGC boost level by external parts and AGC compression level by I C BUS

q

eala(NJRC Original Surround System)

q

Simulated Stereo

2

q

I C BUS Interface

q

Bi-CMOS Technology

NJW1167:

SSOP32, QFP32-J2

q

Package Outline

NJW1167A:

SDIP32

s

BLOCK DIAGRAM

AGC1

SS-FIL

TONE TONE

-Ha -La LF1 LF2 LF3

OUTa

SCL SDA ADR

IN a

VOL1

TONE

VOL2

I

2

CBUS

Interface

AGC

eal a

&

Simulated

Stereo

CVA

CVB

CVW

CTH

CTL

CSR

PORT1

PORT0

AUX1

AUX0

LPF

VOL2

Trimmer

IN b

VOL1

TONE

VOL2

Bias

GND

V+

AGC2

SR-FIL

TONE TONE

-Hb -Lb

OUTb

OUTw

Vref

-1-

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