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NJW1140

PRELIMINARY

AUDIO PROCESSOR with SRS

s

GENERAL DESCRIPTION

The

NJW1140

is a sound processor includes all of the

functions required to process the audio signal for TV, such

as tone control, balance, volume, mute, and AGC functions.

Also the

NJW1140

performs SRS 3D Stereo which

regenerates 3D surround sound with only two speakers.

All of the internal status and variables are controlled by

2

I C BUS interface.

s

PACKAGE OUTLINE

s

FEATURES

q

Operating Voltage

8 to 13V

2

q

I C BUS Interface

q

Internal 6 Input Audio Selectors and Monitor Output

q

The AGC circuit reduces volume difference among input sources.

2

q

Variable AGC Compression Level via I C (4-levels)

q

Includes Dual Surround (SRS 3D Stereo and Simulated Stereo)

2

q

Variable Surround Effect Level via I C (SRS mode, 2-Levels)

q

Low Noise VCA

q

Bi-CMOS Technology

q

Package Outline

SOP40

s

BLOCK DIAGRAM

NJW1140GK1

MONa

AGC

TONE TONE

-Ha

-La

OUTa

-2dB

+4.5dB

IN1a

IN2a

IN3a

IN4a

IN5a

IN6a

SDA

SCL

CVA

CVB

CTH

CTL

CSB

CSR

SEL

VOL1

SRS

3D Stereo

&

Sim ulated

Stereo

VOL1

-2dB

TONE

VOL2

I C BUS

Interface

2

AGC

IN1b

IN2b

IN3b

IN4b

IN5b

IN6b

SEL

TONE

VOL2

Bias

GND

Vcc

+4.5dB

MONb

TONETONE

-Hb -Lb

OUTb

Vref

- 1 -E

next

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