Patent ID: 7113034

Claim:
A high frequency power amplifier module, comprising: a plurality of amplifying transistors which are coupled in cascade and amplify an input signal to provide an output signal; a control circuit which receives a control signal that controls an output power of the output signal output from the plurality of amplifying transistors and which supplies a operation voltage to the plurality of amplifying transistors based on the control signal; and a bias circuit which receives the operation voltage and supplies a bias signal to the plurality of amplifying transistors based on the operation voltage, wherein the plurality of amplifying transistors, the control circuit and the bias circuit are mounted on an insulated board that includes a plurality of conductor layers and a plurality of dielectric layers each of which is provided between the conductor layers, wherein levels of both of the operation voltage and the bias signal are reduced when the control signal instructs that the output power of the output signal output from the plurality of amplifying transistors is to be reduced, and wherein levels of both of the operation voltage and the bias signal are increased when the control signal instructs that the output power of the output signal output from the plurality of amplifying transistors is to be increased.