Patent ID: 8078127

Claim:
A reception device comprising: an automatic gain control circuit adapted to control the amplitude of a received signal; a correction circuit adapted to correct the flutter component in the output signal of the automatic gain control circuit; a synchronization circuit adapted to establish synchronization with the signal whose flutter component has been corrected by the correction circuit; and an equalization circuit adapted to perform an equalization process based on the signal with which synchronization has been established by the synchronization circuit and output the equalized signal, wherein the correction circuit includes a detection circuit adapted to detect the difference between the signal obtained by correcting the flutter component in the output signal of the automatic gain control circuit and the theoretical value signal whose flutter component has been corrected, an infinite impulse response filter adapted to filter the signal representing the difference detected by the detection circuit, a gain circuit adapted to control the amplitude of the output signal of the infinite impulse response filter according to a predetermined gain, a flutter component correction circuit adapted to multiply the output signal of the automatic gain control circuit by a correction signal commensurate with the output signal of the gain circuit to correct the flutter component in the output signal of the automatic gain control circuit, and a gain control circuit adapted to control the gain of the gain circuit based on the equalized signal from the equalization circuit or the signal obtained by correcting the flutter component in the output signal of the automatic gain control circuit.