Importance

Loading Importance Indicators...

Abstract

A multistage power amplifier includes a first amplification circuit disposed in a front stage of the multistage power amplifier, a first bias circuit configured to output a first bias current, a bias path circuit, an envelope detection circuit, and an alternating current (AC) path circuit. The envelope detection circuit is configured to output a direct current (DC) detection voltage based on an envelope signal of a radio frequency (RF) signal input to the first amplification circuit. The AC path circuit is configured to branch an AC signal from an input terminal of the first amplification circuit and transfer the AC signal to the first bias circuit, upon the first amplification circuit operating in a high power driving region based on the DC detection voltage. The first bias circuit is configured to compensate for the first bias current based on the AC signal transferred through the AC path circuit.

Loading the Abstract Image...

First Claim