Patent ID: 7973599
Filing Date: 2011-07-05
Classification: H03G

Abstract:
1. An amplification control device for controlling an amplifier, an amplification factor of which is controlled based on an analog control signal, and which amplifies an analog input signal and outputs an analog output signal, comprising: a component acquirer that transforms, by the discrete Fourier transform, a digital output signal converted from the analog output signal into digital form, thereby acquiring a desired frequency component of the digital output signal; a differentiator that acquires a difference between the electric power of the frequency component acquired by the component acquirer and a target value of the electric power of the frequency component; and a digital control signal outputter that outputs, based on the difference acquired by the differentiator, a digital control signal for controlling the amplification factor of the amplifier, wherein the analog control signal is obtained by converting the digital control signal into analog form, wherein the digital control signal outputter comprises a control signal recorder that records the digital control signal, wherein the control signal recorder records, before a desired analog output signal is obtained, an appropriate control signal which is the digital control signal causing the desired analog output signal to be obtained when a predetermined analog input signal is fed to the amplifier, and wherein the appropriate control signal is calculated based on the predetermined analog input signal and the desired analog output signal.