MOBILE OBJECT COMMUNICATION TERMINAL

摘要

PROBLEM TO BE SOLVED: To prevent an internal microphone and an external microphone from wasting current consumption during standby in a mobile object communication terminal by which a hand-free speech is possible. SOLUTION: The mobile object communication terminal is provided with a microphone bias power source which is turned OFF at the time of detecting standby and is turned ON at the time of detecting speaking a switching circuit outputting a normal mode signal when the mobile object communication terminal becomes a communication state using the internal microphone and outputting an EM mode signal when the mobile object communication terminal becomes a communication state using the external microphone, and a microphone bias switching circuit for switch-connecting the output of the microphone bias power source to the internal microphone when the normal mode signal is inputted and switch-connecting the output of the microphone bias power source to the external microphone when the EM mode signal is inputted.