Pulse or digital communications – Transmitters – Angle modulation
Reexamination Certificate
2007-11-27
2007-11-27
Payne, David C. (Department: 2611)
Pulse or digital communications
Transmitters
Angle modulation
C375S222000, C375S223000, C329S347000, C370S902000, C381S015000, C455S010000
Reexamination Certificate
active
10272389
ABSTRACT:
The frequency doubler of the present invention operates to provide an in-phase signal and a quadrature signal, each having a frequency equal to twice the frequency of a reference signal. The in-phase and quadrature signals are based on signals that are 0 degrees, 45 degrees, 90 degrees, and 135 degrees out of phase with the reference signal. The in-phase signal is provided by multiplying the signals that are 0 degrees and 90 degrees out of phase with the reference signal, and the quadrature signal is provided by multiplying the signals that are 45 degrees and 135 degrees out of phase with the reference signal.
REFERENCES:
patent: 4454486 (1984-06-01), Hassun et al.
patent: 4612585 (1986-09-01), Takase et al.
patent: 4766497 (1988-08-01), Banach et al.
patent: 4868428 (1989-09-01), Cooper
patent: 5180994 (1993-01-01), Martin et al.
patent: 5389886 (1995-02-01), Popescu
patent: 5479112 (1995-12-01), Choi et al.
patent: 5635866 (1997-06-01), Monk et al.
patent: 5635880 (1997-06-01), Brown
patent: 5635892 (1997-06-01), Ashby et al.
patent: 5736749 (1998-04-01), Xie
patent: 5745838 (1998-04-01), Tresness et al.
patent: 5838195 (1998-11-01), Szmurlo et al.
patent: 6008102 (1999-12-01), Alford et al.
patent: 6031432 (2000-02-01), Schreuders
patent: 6031746 (2000-02-01), Steigerwald et al.
patent: 6194947 (2001-02-01), Lee et al.
patent: 6198332 (2001-03-01), O'Toole et al.
patent: 6201452 (2001-03-01), Dent et al.
patent: 6211708 (2001-04-01), Klemmer
patent: 6370372 (2002-04-01), Molnar et al.
patent: 6404255 (2002-06-01), Filliman et al.
patent: 6433630 (2002-08-01), Isoda
patent: 6728527 (2004-04-01), Casagrande
patent: 2003/0017812 (2003-01-01), Arimura
patent: 2003/0020563 (2003-01-01), Hieda et al.
patent: 2004/0032303 (2004-02-01), Saito et al.
Weste, Neil and Kamran Eshraghian, Principles of CMOS VLSI Design: A Systems Perspective, 1985, Addison-Wesley Publishing Company, p. 342.
Tsuneo Tsukahara and Junzo Yamada, “WP 23.5 to 5GHz Quadrature Modulator and Demodulator Using a Wideband Frequency-Doubling Phase Shifter,” 2000 IEEE International Solid-State Circuits Conference, Session 23, Wireless Building Blocks, pp. 384-386.
Shjiva, Sajjan G., “Introduction to Logic Design”, Second Edition, University of Alabama in Hunstville, 1998, pp. 142-161.
“Exclusive OR Gate”, http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/xor.html, Dec. 10, 2003, 4 pages.
Kang, S. and Leblebici, Y., “GMOS Digital Intergrated Circuits: Analysis and Design”, Second Edition, 1999, p. 287.
Lam, C. and Razavi, B., “A 2.6-GHz/5.2-GHz Frequency Synthesizer in 0.4-μm CMOS Technology”, IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 788-794.
Rategh et al., A CMOS Frequency Synthesizer with an Injection-Locked Frequency Divider for a 5-GHz Wireless LAN Receiver, IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 780-787.
Samavati et al., “A 5-GHz CMOS Wireless LAN Receiver Front End”, IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 765-772.
Wong et al., “A Wide Tuning Range Gated Varactor,” IEEE Journal of Solid-State Circuits, vol. 35, No. 5, May 2000, pp. 773-779.
Liu, T. and Westerwick, E., “5-GHz CMOS Radio Transceiver Front-End Chipset”, IEEE Journal of Solid-State Circuits, vol. 35, No. 12, Dec. 2000, pp. 1927-1933.
Steyaert et al., “A 2-V CMOS Cellular Transceiver Front-End”, IEEE Journal of Solid-State Circuits, vol. 35, No. 12, Dec. 2000, pp. 1895-1907.
File Erin M.
Payne David C.
RF Micro Devices, Inc.
Withrow & Terranova , PLLC
LandOfFree
Quadrature frequency doubling system 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 frequency doubling system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quadrature frequency doubling system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3838457