High-frequency receiver having a gain switch controller

Details High-frequency receiver having a gain switch controller High-frequency receiver having a gain switch controller

2006-08-24

2009-08-25

Jackson, Blane J (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S234100, C375S345000

Reexamination Certificate

active

07580690

ABSTRACT:
A high-frequency receiver capable of improving both an interference-resistant characteristic and reception sensitivity is provided. A gain switch control unit includes: a signal level determination unit comparing a gain control voltage of an amplifying circuit with a reference voltage; and a gain switch controller provided between an output terminal of the signal level determination unit and a gain control input terminal provided to an amplifying circuit 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 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.

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European Search Report issued Nov. 19, 2007 in a European Application which is a foreign counter part of the present application.

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