Patent ID: 7373132
Filing Date: 2008-05-13
Classification: H03D,H03J,H03L,H04B

Abstract:
1. A direct conversion type high frequency signal receiver adapted to convert the high frequency signal obtained by receiving a digital broadcast signal from a broadcasting satellite or a communications satellite into a base band signal by frequency conversion, the receiver comprising: an input circuit for inputting high frequency signals; a mixer circuit for converting a signal having a desired frequency and obtained from the input circuit into a base band signal by frequency conversion; and a local oscillation output circuit section for supplying the mixer circuit with a signal having a desired frequency to be mixed with the signal from the input circuit; the local oscillation output circuit section having an source oscillator and a higher harmonic output circuit for taking out a higher harmonic of the output signal of the source oscillator as a signal having a desired frequency; the input circuit having a frequency characteristic of removing all the higher harmonics of the output signal other than the higher harmonic having the desired frequency.