TRANSMISSION/RECEPTION CIRCUIT

摘要

A transmission/reception circuit includes a transmission section (7), a reception section (10), one microphone or a loudspeaker element (13), and a control circuit (20). The control circuit controls to switch between the transmission section and the reception section in such a manner that during a transmission when the microphone or the loudspeaker element performs the microphone function, the transmission switches of the transmission section and the reception section are ON and the reception switch is OFF while during a reception when the microphone the loudspeaker element performs the loudspeaker function, the transmission switches of the transmission section and the reception section are OFF and the reception switch is ON. Thus, it is possible to simplify the transmission/reception circuit and the reduce the circuit size and power consumption which have been impossible conventionally.