RF receiver device

Details RF receiver device RF receiver device

2009-01-26

2011-10-18

Vuong, Quochien B (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

C455S245200, C455S253200

Reexamination Certificate

active

08041322

ABSTRACT:
A radio-frequency receiver includes an RF amplification circuit which amplifies a received RF signal and generates an amplified RF signal, a mixing circuit which converts the amplified RF signal into an intermediate-frequency signal, an IF amplification circuit which generates an amplified IF signal, a first level detection circuit which detects a level of the amplified RF signal, a second level detection circuit which detects a level of the IF signal, a third level detection circuit which detects a level of the amplified IF signal, a RF reference level generation circuit which generates an RF reference level based on one of respective detection signal levels of the first and second level detection circuits, and an RF gain control circuits which controls an amplification gain of the RF amplification circuit so that a detection signal level of the third level detection circuit becomes equal to the RF reference level.

REFERENCES:
patent: 4355414 (1982-10-01), Inoue
patent: 5745847 (1998-04-01), Matsuo
patent: 7672654 (2010-03-01), Okada
patent: 2007/0010193 (2007-01-01), Okada
patent: 2002290178 (2002-10-01), None
patent: 2007019900 (2007-01-01), None

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