Telecommunications – Receiver or analog modulated signal frequency converter – Noise or interference elimination
Reexamination Certificate
2006-01-31
2006-01-31
Vo, Nguyen T. (Department: 2685)
Telecommunications
Receiver or analog modulated signal frequency converter
Noise or interference elimination
C455S307000
Reexamination Certificate
active
06993310
ABSTRACT:
A filter circuit includes a polyphase filter coupled to a first circuit component and a second circuit component. The first circuit component propagates four input current signals to the polyphase filter. The third and fourth input current signals are substantially one-hundred-eighty degrees out of phase with the first and second input current signals. The polyphase filter receives the input current signals and generates four output current signals that are out of phase with each other. The second circuit component generates first and second output signals using the four output current signals. The first and second output signals are ninety degrees out of phase with each other.
REFERENCES:
patent: 6236847 (2001-05-01), Stikvoort
patent: 6696885 (2004-02-01), Christensen
patent: 6778594 (2004-08-01), Liu
patent: 2002/0008983 (2002-01-01), Souto-Diez et al.
patent: 2002/0080718 (2002-06-01), Stikvoort
patent: 2003/0001648 (2003-01-01), Okazaki et al.
patent: 1 164 759 (2001-12-01), None
patent: 2003283253 (2003-10-01), None
patent: WO 02/31962 (2002-04-01), None
Beumer Kim E.
Magnusen Timothy M.
Baker & Botts L.L.P.
Microtune ( Texas), L.P.
Vo Nguyen T.
LandOfFree
Current driven polyphase filters and method of operation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current driven polyphase filters and method of operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current driven polyphase filters and method of operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3556840