Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2008-01-22
2008-01-22
Le, Lana (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S296000, C455S334000, C455S339000
Reexamination Certificate
active
07321754
ABSTRACT:
The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a first selective pass-band filter for filtering radio-frequency signals picked up by an antenna. A frequency synthesizer generates first and second high frequency signals, wherein the frequency of the first signals is higher than the frequency of the second signals. This synthesizer receives reference signals from an oscillator unit. A first mixer unit mixes the radio-frequency signals with the first signals in order to generate frequency-converted signals. A second pass-band filter filters the signals from the first mixer unit, and provides signals to a second mixer unit to mix them with the second high frequency signals. Finally, shaping means for the signals provided by the second mixer unit generate the intermediate signals. The second filter is a not very selective active filter, which is integrated, in an RF/IF integrated circuit with the first and second mixer units, the signal shaping means, and certain parts of the synthesizer and the oscillator unit.
REFERENCES:
patent: 4445118 (1984-04-01), Taylor et al.
patent: 4601005 (1986-07-01), Kilvington
patent: 5293170 (1994-03-01), Lorenz et al.
patent: 5420592 (1995-05-01), Johnson
patent: 5663734 (1997-09-01), Krasner
patent: 5781155 (1998-07-01), Woo et al.
patent: 5905460 (1999-05-01), Odagiri et al.
patent: 6061390 (2000-05-01), Meehan et al.
patent: 6377315 (2002-04-01), Carr et al.
patent: 6437736 (2002-08-01), Ueda et al.
patent: 6600911 (2003-07-01), Morishige et al.
patent: 6630868 (2003-10-01), Perrott et al.
patent: 6725159 (2004-04-01), Krasner
patent: 6839021 (2005-01-01), Sheynblat et al.
patent: 6973297 (2005-12-01), Manku et al.
patent: 7236212 (2007-06-01), Carr et al.
patent: 2002/0004392 (2002-01-01), Farine et al.
patent: 199 06 801 (1999-08-01), None
patent: 199 26 101 (2001-02-01), None
patent: 0 445 522 (1991-09-01), None
patent: 523938 (1993-01-01), None
patent: 0 678 974 (1995-10-01), None
patent: 0 523 938 (1997-10-01), None
patent: WO 95/30275 (1995-11-01), None
patent: 01/17120 (2001-03-01), None
European Search Report (in French), completed Jan. 21, 2002, by N. Butler.
Farine Pierre-Andre
Imfeld Kilian
Oesch Yves
Zellweger Emil
Asulab S.A.
Griffin & Szipl, P.C.
Guzman April S.
Le Lana
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