Patent ID: 8848828

Claim:
A distortion compensation circuit for compensating for distortion characteristics of an amplifier, comprising: a distortion compensating coefficient calculator that calculates a distortion compensating coefficient to be used for compensation of the distortion characteristics by comparing an input signal with an output signal amplified by the amplifier; a bit format determiner that sets up a bit format with a predetermined number of bits that expresses a numerical value of a target signal having a first precision with a different, second precision; a distortion compensating operation unit that performs a distortion compensating operation on the input signal, using the bit format set by the bit format determiner and the distortion compensating coefficient calculated by the distortion compensating coefficient calculator; a distortion compensation-operated maximum amplitude calculator that calculates, based on the distortion compensating coefficient calculated by the distortion compensating coefficient calculator, a maximum amplitude of a distortion-compensated signal input to the amplifier, determined depending on an amount of compression at a saturation output point of the amplifier; and a bit format determiner that sets up the bit format so as to be able to express the maximum amplitude calculated by a distortion compensation-operated maximum amplitude calculator.