High-frequency receiver

A high-frequency receiver capable of improving both an interference-resistant characteristic and reception sensitivity is provided. A gain switch control unit(25) includes: a signal level determination unit(69) comparing a gain control voltage of an amplifying circuit(47) with a reference voltage; a...

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Bibliographic Details
Main Authors FURUSAWA, TOSHIHIRO, KOYAMA, TAKAHIRO, HIBINO, YASUHIRO, FUJISHIMA, AKIRA, KITAMURA, HIROKAZU, UMEDA, TAKASHI
Format Patent
LanguageEnglish
French
German
Published 02.02.2011
Subjects
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
TRANSMISSION
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Summary:A high-frequency receiver capable of improving both an interference-resistant characteristic and reception sensitivity is provided. A gain switch control unit(25) includes: a signal level determination unit(69) comparing a gain control voltage of an amplifying circuit(47) with a reference voltage; and a gain switch controller(67) provided between an output terminal of the signal level determination unit(69) and a gain control input terminal(41a) provided to an amplifying circuit(41) for gain control. When receiving a signal in a strong electric field area having a high possibility that a strong interference signal exists, a gain of the amplifying circuit (41) is set to be smaller than that in a case of receiving a signal in a weak electric field area by a gain switch signal output from the gain switch controller(67).
Bibliography:Application Number: EP20060119275