Patent ID: 7649413
Filing Date: 2010-01-19
Classification: H03F

Abstract:
1. A high-frequency power amplifier comprising: a power supply unit for including a transistor for switching whose drain electrode-source electrode or collector electrode-emitter electrode are on/off controlled according to a pulse signal corresponding to an envelope signal of a high-frequency signal applied to a gate electrode or to a base electrode, and for generating a voltage corresponding to said envelope signal by means of on/off operation of said transistor for switching, wherein the power supply unit comprises: a transistor for power amplification which is a source electrode grounded type or an emitter electrode grounded type, to which a voltage generated by said power supply unit is supplied as an operating voltage, in which said high-frequency signal is applied to said gate electrode or to said base electrode, wherein said transistor for switching in said power supply unit and said transistor for power amplification are configured in one package so that said source electrodes or said emitter electrodes are commonly connected.