TRANSMISSION OUTPUT CONTROL METHOD AND CIRCUIT THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a transmission output control method which can reduce power consumption when transmission output is large and can reduce the errors of transmission output control when transmission output is small. SOLUTION: In a transmission output control method for taking out a part of the transmission output of a power amplifier 104 by a capacitor and generating a control signal for controlling the amplification rate of transmission output, capacitors 121 and 122 different in capacity are switched and used in accordance with the size of the transmission output of the power amplifier 104. When transmission output is large. The capacitor of small capacity is selected and therefore power consumed in the control of transmission output can be reduced.