Order this document by MC33218A/D Advance Information Voice Switched Speakerphone with Microprocessor Interface The Motorola MC33218A Voice Switched Speakerphone Circuit incorporates the necessary amplifiers, attenuators, level detectors, and control algorithm to form the heart of a high quality hands free speakerphone system.
Included are a microphone amplifier with mute, transmit and receive attenuators, a background monitoring system for both the transmit and receive paths, and level
