VOICE SWITCHED SPEAKER-PHONE CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD MC34018 LINEAR INTEGRATED CIRCUIT VOICE SWITCHED SPEAKER-PHONE CIRCUIT  DESCRIPTION The UTC MC34018 speaker-phone integrated circuit includes all the active circuitry and control functions to implement a high quality hands-free telephone system. The circuit includes a microphone amplifier, a speaker amplifier, level detectors, a background sound level monitoring system in both the transmit and receive channels and an attenuation system which can control the transmit and receive levels as well as the background level. The applications include household and of.

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