RADIO COMMUNICATION DEVICE OF MULTIBAND SPECIFICATIONS

摘要

PROBLEM TO BE SOLVED: To improve the performance characteristics of a portable radio communication device by switching the load to be connected to an input terminal or an output terminal depending on the transmitting or receiving state in order to implement loading conditions to fulfill the characteristics as ASM desired. SOLUTION: A load switching circuit (1-4) capable of switching the load impedance to be connected to ASM1 depending on the operating conditions in transmitting or receiving is connected to any one of the ASM1 input or output terminals.