Patent ID: 7629851
Filing Date: 2009-12-08
Classification: H03F,H03G

Abstract:
1. A high frequency power amplifier circuit, comprising: a power amplifying means for receiving a high frequency signal, amplifying said high frequency signal and supplying an amplified high frequency signal; and a current-voltage converting means for receiving a current, converting said current into a voltage by applying a predetermined current and supplying the voltage, said current-voltage converting means being connected to said power amplifying means, wherein a voltage corresponding to the voltage generated by said current-voltage converting means is applied to a control pin of said power amplifying means thereby to make flow a current that is proportional to the current flowing to said current-voltage converting means, and wherein said power amplifying means comprises a field-effect transistor of a dual gate having a first gate and a second gate, and includes a bias control circuit that can independently set a bias voltage of said first gate and said second gate.