Patent ID: 6977545
Filing Date: 2005-12-20
Classification: H03D,H04B,H04L,H04W

Abstract:
1. An FM signal receiver, comprising: a bandpass filter for selecting a received burst signal; a frequency-demodulation circuit for converting the burst signal selected by the bandpass filter from a frequency to a voltage; an amplifier for amplifying the burst signal converted from the frequency to the voltage by the frequency-demodulation circuit; an analog-to-digital converter circuit for converting to digital the burst signal fed via the amplifier for demodulation; a control circuit for adjusting frequency characteristics of the bandpass filter and the frequency-demodulation circuit through an identical control signal immediately before a receiving operation; and a shorting circuit provided between input and output terminals of the amplifier, the shorting circuit being opened during the receiving operation and shorted during an adjusting operation.