Patent ID: 7729681
Filing Date: 2010-06-01
Classification: G04R

Abstract:
1. A radio wave receiving apparatus comprising: an amplification section which amplifies a signal received by an antenna; a reference-frequency output section which outputs a reference frequency signal with a predetermined frequency; a frequency-dividing section which frequency-divides the reference frequency signal output from the reference-frequency output section or a signal obtained by multiplying the frequency of the reference frequency signal by a plurality of frequency-dividing ratios, and which outputs a plurality of the frequency-divided signals; a multi-stage frequency conversion section in which a plurality of conversion circuits are connected serially, wherein the plurality of conversion circuits output signals obtained by converting frequencies of input signals based on the frequency-divided signals output from the frequency-dividing section, as conversion signals, and wherein the received signal amplified by the amplification section is supplied to a first stage of the conversion circuits as an input signal; and a detection section which detects a conversion signal output from a final stage of the conversion circuits in the multi-stage frequency conversion section by using, as a reference signal, any one of the frequency-divided signals from the frequency-dividing section.