Noise suppression circuit for radio transceiver microphone.

摘要

A noise suppressing circuit in a digital portable telephone adjusts a level of signals from a microphone through an analog-to-digital converter to suppress ambient noise. An encoder produces encoded signals from output signals of the noise suppressing circuit. By suppressing ambient noise in a transmitting side, the digital portable telephone is capable of preventing an awkward feeling to a person in a receiving side. <IMAGE>