Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By phase
Reexamination Certificate
2007-09-18
2007-09-18
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By phase
C327S002000, C331S046000, C331S1170FE
Reexamination Certificate
active
11473620
ABSTRACT:
In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of two differential modified Colpitts oscillators. A capacitor bank allows for the selection of a desired frequency from a plurality of discrete possible frequencies. The quadrature oscillator is further coupled with a phase-error detector connected at the point-of-use of the generated ‘I’ and ‘Q’ channels and through the control of current sources provides corrections means to ensure that the phase shift at the point-of-use remains at the desired ninety degrees.
REFERENCES:
patent: 4947141 (1990-08-01), Atkinson et al.
patent: 5438301 (1995-08-01), Havens et al.
patent: 5629652 (1997-05-01), Weiss
patent: 5949821 (1999-09-01), Emami et al.
patent: 6044112 (2000-03-01), Koslov
patent: 6198777 (2001-03-01), Feher
patent: 6229406 (2001-05-01), Wang
patent: 6249190 (2001-06-01), Rozenblit et al.
patent: 6307894 (2001-10-01), Eidson et al.
patent: 6429748 (2002-08-01), Nicholls et al.
patent: 6445749 (2002-09-01), Feher
patent: 6456167 (2002-09-01), Huang
patent: 6462626 (2002-10-01), Gharpurey
patent: 6560448 (2003-05-01), Baldwin et al.
patent: 6650195 (2003-11-01), Brunn et al.
patent: 6674998 (2004-01-01), Prentice
patent: 6687314 (2004-02-01), Leonard et al.
patent: 6694129 (2004-02-01), Peterzell et al.
patent: 6696899 (2004-02-01), Ruffieux
patent: 6707344 (2004-03-01), Cargill et al.
patent: 6735426 (2004-05-01), Pau
patent: 6750727 (2004-06-01), Sutardja
patent: 6812763 (2004-11-01), Lin et al.
patent: 6870432 (2005-03-01), Li et al.
patent: 6906596 (2005-06-01), Kitamura et al.
patent: 6937107 (2005-08-01), Ravi et al.
patent: 7016613 (2006-03-01), Savoj
patent: 7075377 (2006-07-01), Metaxakis
patent: 2002/0008590 (2002-01-01), Van Der Tang et al.
patent: 2002/0039052 (2002-04-01), Straub et al.
patent: 2003/0076186 (2003-04-01), Ichimaru
patent: 2003/0139167 (2003-07-01), Ciccarelli et al.
patent: 2003/0189467 (2003-10-01), Krawczyk, Jr. et al.
patent: 2003/0220086 (2003-11-01), Birkett
patent: 2004/0005869 (2004-01-01), See et al.
patent: 2004/0092241 (2004-05-01), Kim et al.
patent: WO92/11704 (1992-07-01), None
Blakely , Sokoloff, Taylor & Zafman LLP
Le Dinh T.
Theta Microelectronics, Inc.
LandOfFree
Quadrature voltage controlled oscillators with phase shift... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quadrature voltage controlled oscillators with phase shift..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quadrature voltage controlled oscillators with phase shift... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3733030