Patent ID: 7561860

Claim:
A receiver system comprising AM and FM receivers: the AM receiver including, an antenna to make first and second received signals out of transmitted signals, a first local oscillator to generate a first reference local oscillation signal and a first orthogonal local oscillation signal phase-shifted by 90° from the first reference local oscillation signal, a first I/Q mixer having a first I mixer and a first Q mixer wherein the first I mixer mixes the first received signal with the first reference local oscillation signal from the first local oscillator and the first Q mixer mixes the first received signal with the first orthogonal local oscillation signal from the first local oscillator, a first noise detector to carry out peak and differential detections of output signals from the first I/Q mixer to detect impulse noises in a form of a first pulse signal from the first received signal, a first interpolator carrying out shaping of waveforms of the output signals from the first I/Q mixer in response to the first pulse signal from the first noise detector, an AM detector to demodulate the output signal from the first interpolator, and a second interpolator carrying out shaping of waveforms of the output signals from the AM detector in response to the first pulse signal from the first noise detector; and the FM receiver including, a second local oscillator to generate a second reference local oscillation signal and a second orthogonal local oscillation signal phase-shifted by 90° from the second reference local oscillation signal, a second I/Q mixer having a second I mixer and a second Q mixer wherein the second I mixer mixes the second received signal with the second reference local oscillation signal from the second local oscillator and the second Q mixer mixes the first received signal with the second orthogonal local oscillation signal from the second local oscillator, a second noise detector to carry out peak and differential detections of output signals from the second I/Q mixer to detect impulse noises in a form of a second pulse signal from the second received signal, a third interpolator carrying out shaping of waveforms of the output signals from the second I/Q mixer in response to the second pulse signal from the second noise detector, an FM detector to demodulate the output signal from the first interpolator, and a fourth interpolator carrying out shaping of waveforms of the output signals from the FM detector in response to the second pulse signal from the second noise detector.