Smart phone and Bluetooth earset having digital two-way radio function

摘要

A smart phone having a digital radio function includes a reception portion to which an analog voice signal is input, a first amplification portion to amplify the analog voice signal input through the reception portion, an A/D converter to convert the amplified analog voice signal into a digital voice signal, a control portion to receive and output the digital voice signal and to output a digital voice signal received and input through an antenna, an RF transceiver to control inputting the signal received through the antenna to the control portion and to transmit the signal output from the control portion through the antenna, a D/A converter to convert the digital voice signal into an analog voice signal, a second amplification portion to amplify the analog voice signal, and a voice output portion to externally transmit the analog voice signal output from the second amplification portion.