Patent ID: 8081943

Claim:
A receiving apparatus comprising: an amplification section that amplifies a received signal; a frequency conversion section that converts a frequency of the received signal, amplified by the amplification section, from a radio frequency to a baseband, the baseband having a lower frequency than the radio frequency; a gain control section that amplifies, by a predetermined gain, the received signal, subjected to the frequency conversion to the baseband, by the frequency conversion section; a voltage calibration section that performs calibration processing on an offset voltage generated in the received signal subjected to frequency conversion to the baseband by the frequency conversion section; a time constant control section that sets a first time constant during a reception operation and sets a second time constant, which is reduced with respect to the first time constant, during the calibration processing; a filter section that passes a received signal of a predetermined band with the first time constant or the second time constant; and an operation control section that stops an operation of the amplification section during the calibration processing and controls the amplification section to operate during the reception operation, and controls the operation of the amplification section so as to reduce a residual offset voltage caused by switching the operation of the amplification section.