SAA7740 查看數據表（PDF） - Philips Electronics

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产品描述 (功能)

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SAA7740

Digital Audio Processing IC (DAPIC)

Philips Electronics 

Philips Semiconductors

Digital Audio Processing IC (DAPIC)

Product specification

SAA7740H

QUAD-FILTER MODE

In the quad-filter mode two stereo signals are accepted

(see Fig.6). DC filtering is performed at the inputs before

further processing. A correction can be performed on the

input signals using a 4-band graphic equalizer, i.e. 8 poles

and 8 zeros can be placed arbitrarily in the Z-domain.

At the output, different delays can be applied to the

4 channels via the external DRAM. The interfacing and

addressing of the DRAM is performed by the DAPIC.

The application for this mode is in 4-channel correction

applications such as car and home audio systems.

STEREO EXPANSION MODE

In the stereo expansion mode one stereo signal is

accepted (see Fig.7). DC filtering is performed at the

inputs before further processing. A 4-band graphic

equalization is first performed after which a complex

stereo expansion is applied. A room effect can be added

by the addition of early reflections.

The applications for this mode are in the headphone

out-of-head and incredible stereo applications.

handbook, full pagewidth

8 POLE/ZERO

CORRECTION

FILTER

SWITCHES

DC

FILTERS

8 POLE/ZERO

CORRECTION

FILTER

8 POLE/ZERO

CORRECTION

FILTER

DELAY (1)

SWITCHES

(1) External DRAM.

8 POLE/ZERO

CORRECTION

FILTER

Fig.6 Quad filter mode.

MLC154

1997 May 30

10

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