Patent ID: 8462894

Claim:
A receiver circuit, comprising: an analog signal processor configured to frequency-convert an input high frequency signal into a baseband signal, and to perform low pass filtering at a cutoff frequency below a desired-wave band; an analog-to-digital converter (ADC) configured to convert an output of the analog signal processor into a digital signal; and a digital signal processor configured to compensate an output of the ADC for a signal component in the desired-wave band which has been attenuated by the filtering operation of the analog signal processor, wherein the analog signal processor includes: a first amplifier configured to perform low noise amplification on the high frequency signal, a local oscillator configured to generate a local oscillator signal, a frequency converter configured to frequency-convert an output of the first amplifier using the local oscillator signal, and to perform the low pass filtering on a frequency-converted signal at the cutoff frequency below the desired-wave band, a second amplifier configured to amplify an output of the frequency converter, and an analog filter configured to attenuate a signal component outside of the desired-wave band contained in an output of the second amplifier, and the digital signal processor includes: a digital filter configured to remove a signal component outside of the desired-wave band contained in the output of the ADC, and a compensator configured to filter an output of the digital filter with an inverse characteristic relative to that of the frequency converter.