Amplifier circuit and wireless communication equipment

摘要

Distortion compensation is performed taking into account a memory effect that occurs in a signal path other than an input-to-output path of an amplifier. An amplifier circuit 1 includes an amplifier 2 that amplifies a signal, a variable power supply 3 that varies a power supply voltage of the amplifier 2 in accordance with envelope change, and a distortion compensation section 4 that performs compensation for distortion characteristics. The distortion compensation section 4 performs the distortion compensation, based on an amplifier model which represents a memory effect that occurs on a path from a signal input port 2a of the amplifier 2 to a signal output port 2b thereof, and a memory effect that occurs on a path from a power supply port 2c of the amplifier 2 to the signal output port 2b thereof.

主权项

1. An amplifier circuit, comprising:
an amplifier that amplifies a signal; a variable power supply that varies a power supply voltage or a power supply current to be supplied to a power supply port of the amplifier, in accordance with change in an envelope of the signal; and a distortion compensation section that performs compensation for distortion characteristics of the amplifier, wherein the distortion compensation section performs a process of compensating a memory effect that occurs on a path from the power supply port to a signal output port, the distortion compensation section includes an estimation section that estimates a model of the amplifier, and performs distortion compensation based on the model estimated by the estimation section, the model represents at least the memory effect that occurs on the path from the power supply port to the signal output port, and the process is performed on the signal to be inputted to a signal input port of the amplifier.