Receiver for weak radio wave

Telecommunications – Receiver or analog modulated signal frequency converter

Reexamination Certificate

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Details

C455S214000, C455S293000, C455S333000, C455S336000

Reexamination Certificate

active

07076219

ABSTRACT:
An aspect of the present invention provides a receiving circuit that includes a mixer configured to receive a signal and a local signal to mix the signals, the mixer configured to convert the signals into an intermediate frequency signal, an IF filter configured to filter the intermediate frequency signal outputted from the mixer, an IF amplifier configured to amplify a band of the intermediate frequency signal outputted from the IF filter, and a demodulation circuit configured to receive a signal outputted from the IF amplifier to carry out demodulation, wherein a part of the demodulation circuit is disposed outside of the receiving circuit.

REFERENCES:
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patent: 5737035 (1998-04-01), Rotzoll
patent: 5930695 (1999-07-01), Yamaguchi et al.
patent: 6177964 (2001-01-01), Birleson et al.
patent: 6337976 (2002-01-01), Kudou
patent: 6600911 (2003-07-01), Morishige et al.
patent: 6714776 (2004-03-01), Birleson
patent: 60-7209 (1985-01-01), None
patent: 61-5630 (1986-01-01), None
patent: 7-86856 (1995-03-01), None
patent: 8-70261 (1996-03-01), None
patent: 8-79125 (1996-03-01), None
patent: 2001-77716 (2001-03-01), None

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