Patent ID: 6999742
Filing Date: 2006-02-14
Classification: H04B

Abstract:
1. A heterodyne receiver comprising: a tuner configured to select a frequency of a received signal; a converter, coupled to an output of the tuner, for changing the frequency of the received signal to an intermediate frequency; a single-pole/double throw switch having an input directly coupled to an output of the converter; a first band-pass filter directly coupled to a first output of the single-pole/double throw switch; an amplifier directly coupled to a second output of the single-pole/double throw switch and the first band-pass filter; a second band-pass filter directly coupled to an output of the amplifier; a demodulator coupled to an output of the second band-pass filter to produce an output signal and a characteristics signal; and a logic circuit coupled to receive the characteristics signal and by-passing the first band-pass filter if the characteristics signal is less than a predetermined threshold.