Playing back voice/sound in a digital portable telephone

摘要

A digital portable telephone unit of the invention is equipped with: an antenna 101 through which signal is transmitted and received; a radio section 102 which conducts the frequency conversion of signal and outputs IF (intermediate frequency) and RSSI (receive signal strength indicator); a demodulation section 103A which demodulates the IF to output receive data; an A/D converter 114 which outputs digitalizing the voltage of RSSI; and a control section 109 which receives the receive data and outputs audio signal. The demodulation section 103A outputs a trigger 135 to indicate an RSSI symbol point to the A/D converter 114.