Patent ID: 8463211
Filing Date: 2013-06-11
Classification: H04B

Abstract:
1. A radio frequency signal receiving apparatus, comprising: a first poly-phase filter, receiving a radio frequency input signal and thereby producing a plurality of filtered radio frequency signals; a first frequency-mixer module, coupled to the first poly-phase filter for conducting frequency-mixing operation on the filtered radio frequency signals according to a reduced-frequency signal so as to produce a plurality of reduced-frequency radio frequency signals; a first switch, receiving the reduced-frequency radio frequency signal and transmits the reduced-frequency radio frequency signal to a first channel or a second channel according to a selection signal; a second poly-phase filter, coupled to the first switch and receiving the reduced-frequency radio frequency signal transmitted by the second channel so as to conduct filtering operation; a low-pass filter module, coupled to the second poly-phase filter and the first switch and receiving the reduced-frequency radio frequency signal transmitted by the first channel to conduct low-pass filtering operation and further produce a low-intermediate-frequency signal or a zero-intermediate-frequency signal, the low-pass filter module comprises: a reducing-frequency voltage controlled oscillator, coupled to the first frequency-mixer module for producing the reduced-frequency signal.