Patent ID: 6972626
Filing Date: 2005-12-06
Classification: H03F,H03G

Abstract:
1. A high frequency power amplification electric part comprising: a power amplifier which amplifies a modulated high frequency signal; detecting circuitry which generates a detected current related with an output power from the power amplifier; current-voltage converting means which converts the detected current of the detecting circuitry into a voltage; an error amplifier which compares the voltage converted by the current-voltage converting means with an output level designation signal and outputs a signal corresponding to the difference therebetween; and a bias generator which supplies a bias to the power amplifier in accordance with a signal output of the error amplifier, wherein a current converter which converts the detected current of the detecting circuitry into a current represented by a function which has no local maximum and monotonously increases in an upward convex form, is provided between the detecting circuitry and the current-voltage converting means.