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NJW1148

Audio Processor with Sound Enhancement and TruSurround Virtualizer

Japan Radio Corporation  

PRELIMINARY

NJW1148

Audio Processor with Sound Enhancement and TruSurround Virtualizer

I GENERAL DESCRIPTION

The NJW1148 is an audio processor with BBE sound enhancement

and SRS Labs' TruSurround virtualizer. It includes all of functions

processing audio signal for TV, such as volume, balance, mute, line out,

tone control, eala NJRC surround and simulated stereo functions. All of

internal status and variables are controlled by I2C BUS.

I FEATURES

I PACKAGE OUTLINE

G Operating Voltage

8 to 10 V

G I2C BUS Interface

(Fast-Mode)

G Passive TruSurround

G BBE

0dB to +15dB(0.5dB/step)

G eala (surround effect ; 2 steps) and Simulated Stereo

GVolume

0 to -80dB, MUTE(0.33dB/step)

GBalance

0 to -30dB, MUTE(1dB/step)

GTone Control

-15dB to +15dB(0.5dB/step)

G Bi-CMOS Technology

G Package Outline

QFP48-P1

NJW1148FP1

I BLOCK DIAGRAM

INA

VOL1

BBE

TONE

VOL2

Passive Matrix

TruSurround

/ SRS 3D Stereo

/ eala

VOL2

/ Simulated Stereo

INB

VOL1

BBE

TONE

VOL2

AGCTC

Bias

Buffer

VREF

MIXOUT

LFIN

LFOUT

OUTC

CAP

–1–

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