QS7785PF 查看數據表（PDF） - Nippon Precision Circuits

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QS7785PF

3D 2/4-Channel Stereo Surround Synthesizer

Nippon Precision Circuits  

QS7785PF/CF

In output modes 9 to 11, the input stereo signal is

output to the speakers without processing. The

bypass function works for both stereo and mono

input signals, and is used to listen to the original sig-

nals. In mode 9, the stereo signal is output on front

speakers only. In mode 10, the stereo signal is output

Center signal output

on both front and surround speakers. In mode 11, the

stereo signal is output on surround speakers only.

In output mode 12, the input stereo signal is output

on front speakers, and a surround effect enhanced

signal is output on the surround speakers.

Control pins/SDA signal1

BYP

MONO

SUR

SP

×

×

×

×

×

×

×

×

1. – (dash) = no output signal.

× = indicates don’t care.

1 = HIGH, 0 = LOW

Output signal

AC

COUT

0

–

1

(RIN + LIN) / 2

The center signal is output on COUT. See “Center Control.”

Bass boost mode

Control pins/SDA signal1

BYP MONO SUR

SP

AC

×

×

×

×

×

×

×

×

×

×

1. × = indicates don’t care.

1 = HIGH, 0 = LOW

BASS

0

1

FROUT/FLOUT

Bass boost OFF

Bass boost ON

Output signal

SROUT/SLOUT

Bass boost OFF

Bass boost ON

COUT

Bass boost OFF

Bass boost ON

The bass boost function is used to enhance the bass frequency component. See “Bass Boost.”

Mute and power save

Control pins/SDA signal1

BYP MONO SUR SP

AC BASS

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

×

1. – (dash) = no output signal.

× = indicates don’t care.

1 = HIGH, 0 = LOW

MUTE

0

1

1

PSAVE

0

0

1

FROUT/FLOUT

Available

–

–

Output signal

SROUT/SLOUT

Available

–

–

When PSAVE is HIGH, the analog stages of the

device are turned OFF to save power. When MUTE

is HIGH, all outputs are muted.

COUT

Available

–

–

NIPPON PRECISION CIRCUITS—9

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