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TDA7346

DIGITAL CONTROLLED SURROUND SOUND MATRIX

1 STEREO INPUT

THREE INDEPENDENT SURROUND MODES

ARE AVAILABLE MOVIE, MUSIC AND SIMU-

LATED

- MUSIC: 4 SELECTABLE RESPONSES

- MOVIE AND SIMULATED:

256 SELECTABLE RESPONSES

TWO INDEPENDENT INPUT ATTENUATORS

IN 0.31dB FOR BALANCE FACILITY

ALL FUNCTIONS PROGRAMMABLE VIA SE-

RIAL BUS

DESCRIPTION

The TDA7346 reproduces surround sound by us-

ing phase shifters and a signal matrix. Control of

all the functions is accomplished by serial bus.

The AC signal setting is obtained by resistor net-

BLOCK DIAGRAM

SO20

DIP20

ORDERING NUMBER:

TDA7346 (DIP20)

TDA7346D (SO20)

works and switches combined with operational

amplifiers.

5.6nF

680nF

100nF

4.7nF

22nF

22nF

LP1

HP1

HP2

PS1

PS2

PS3

PS4

100nF

L-in

100K

RLP1

RHP1

R5

R6

-

+

RPS1

RPS2

RPS3

RPS4

MIXING

AMP

Lout

PS1

90Hz

PS2

4KHz

PS3

400Hz

PS4

400Hz

-

+

SIM

MUSIC

MOVIE/

MUSIC

PHASE SHIFTER

100nF

R-in

100K

SUPPLY

MIXING

AMP

Rout

VS

AGND

CREF

February 1997

+

-

L-R

LPF

9KHz

C5

22碌F

LP

1.2nF

+

OFF

MOVIE/SIM

SCL

I

2

C BUS

DECODER

LATCHES

SDA

DIG GND

ADDR

EFFECT

CONTROL

REAR

D94AU122A

1/14

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