Patent ID: 9065404
Filing Date: 2015-06-23
Classification: H03F,H03G

Abstract:
1. An amplifying device that amplifies an input signal, comprising: amplification means that amplifies the input signal; amplification control means that controls a power supply voltage, which is supplied to the amplification means, based on the input signal; first detection means that detects a amplification factor or a phase difference between the input signal and a feedback signal generated by feeding back a signal amplified by the amplification means; second detection means that detects a variance of amplification factors or phase differences of each value or range of amplitude of the input signal for the amplification factors or phase differences detected by the first detection means; and amplification control update means that updates the power supply voltage, which is controlled by the amplification control means and is supplied to the amplification means, to a higher voltage for a value or range of amplitude where the variance detected by the second detection means is larger than a predetermined threshold, and updates the power supply voltage, which is controlled by the amplification control means and is supplied to the amplification means, to a lower voltage for a value or range of amplitude where the variance detected by the second detection means is smaller than the predetermined threshold.