| 摘要 |
<P>PROBLEM TO BE SOLVED: To shorten time spent for knowing the size of frequency of a local oscillation signal needed to obtain a receiving signal and to reduce power consumption. Ž<P>SOLUTION: The receiver includes: a local oscillator for changing frequencies of a local oscillation signal at a time, generating a local oscillation signal, and outputting voltage corresponding to the size of the frequency of the local oscillation signal; a mixer for mixing a receiving signal with the local oscillation signal; a band filter for passing a signal having a prescribed frequency; a detector circuit for detecting whether or not the signal whose frequency has been converted by the mixer passes the band filter; and a control circuit for recognizing that the frequency of the local oscillation signal corresponding to a voltage which occurs when it is informed that the receiving signal has been obtained from the detector circuit is necessary to obtain the receiving signal and instructing the local oscillator to keep generating local oscillation signals having the frequency. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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