CIRCUIT FOR EFFICIENTLY IMPROVING POWER AMPLIFIER IN DUAL MODE PORTABLE WIRELESS TERMINAL

摘要

PURPOSE: A circuit for efficiently improving a power amplifier in a dual mode portable wireless terminal is provided to decrease a consumption power of the terminal by satisfying characteristics of CDMA(Code Division Multiple Access) and AMPS(Advanced Mobile Phone Service) modes in dual mode using only one power amplifier and optimizing efficiency. CONSTITUTION: A CDMA matching unit(20) connects to an output terminal of a power amplifier(10) and performs a matching when being operated as a CDMA mode. An AMPS matching unit(30) connects to an output terminal of a power amplifier(10) and performs a matching when being operated as an AMPS mode. A switch(40) connects to one between the CDMA matching unit(20) and the AMPS matching unit(30) on the basis of a signal provided according to the selection of one between the CDMA and AMPS modes.