NJW1140 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJW1140

AUDIO PROCESSOR with SRS

Japan Radio Corporation  

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

I2C BUS interface.

s PACKAGE OUTLINE

s FEATURES

q Operating Voltage

8 to 13V

q I2C BUS Interface

q Internal 6 Input Audio Selectors and Monitor Output

q The AGC circuit reduces volume difference among input sources.

q Variable AGC Compression Level via I2C (4-levels)

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

q Variable Surround Effect Level via I2C (SRS mode, 2-Levels)

q Low Noise VCA

q Bi-CMOS Technology

q Package Outline

SOP40

s BLOCK DIAGRAM

NJW1140GK1

IN1a

IN2a

IN3a

IN4a

IN5a

IN6a

IN1b

IN2b

IN3b

IN4b

IN5b

IN6b

MONa AGC

SEL

AGC

SEL

MONb

VOL1

VOL1

TONE TONE

-Ha -La

OUTa

SRS

3D Stere o

&

Sim ulated

Stere o

TONE

TONE

VOL2

VOL2

I2C BUS

Interface

SDA

SCL

CVA

CVB

CTH

CTL

CSB

CSR

Bias

GND

Vcc

TONETONE

-Hb -Lb

OUTb

Vref

- 1 -E

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