AUDIO

Preamplifier with TDA7318D

FEATURES:

* S/N ratio 106dB

* 4 stereo outputs (front + rear) + central channel with +22dB BASS BOOST !!!!!
* INPUT MULTIPLEXER:

- 4 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTION TO DIFFERENT SOURCES

* INPUT AND OUTPUT FOR EXTERNAL EQUALIZER OR NOISE REDUCTION SYSTEM

* VOLUME CONTROL IN 1.25dB STEPS

* TREBLE AND BASS CONTROL

* FOUR SPEAKER ATTENUATORS:

- 4 INDEPENDENT SPEAKERS CONTROL IN 1.25dB STEPS FOR BALANCE AND FADER FACILITIES
- INDEPENDENT MUTE FUNCTION

* CENTRAL CHANNEL OUTPUT with max. +22dB BASS BOOST (see pic.1)
* ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2C BUS

Pic. 1 Central channel - PSpice simulation results.

Pic. 2 Schematic ( jpeg picture - see download for Protel 99 schematic)

You can view PCB design and order it.


AUDIO Preamplifier with TDA7318D FEATURES: * S/N ratio 106dB * 4 stereo outputs (front + rear) + central channel with +22dB BASS BOOST !!!!! * INPUT MULTIPLEXER: - 4 STEREO INPUTS - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTION TO DIFFERENT SOURCES * INPUT AND OUTPUT FOR EXTERNAL EQUALIZER OR NOISE REDUCTION SYSTEM * VOLUME CONTROL IN 1.25dB STEPS * TREBLE AND BASS CONTROL * FOUR SPEAKER ATTENUATORS: - 4 INDEPENDENT SPEAKERS CONTROL IN 1.25dB STEPS FOR BALANCE AND FADER FACILITIES - INDEPENDENT MUTE FUNCTION * CENTRAL CHANNEL OUTPUT with max. +22dB BASS BOOST (see pic.1) * ALL FUNCTIONS PROGRAMMABLE VIA SERIAL I2C BUS Pic. 1 Central channel - PSpice simulation results. Pic. 2 Schematic ( jpeg picture - see download for Protel 99 schematic) You can view PCB design and order it.




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