Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Reexamination Certificate
2008-01-29
2008-01-29
Duong, Frank (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
C331S182000, C375S371000
Reexamination Certificate
active
07324561
ABSTRACT:
A circuit for generating an output oscillation signal with low jitter includes an oscillator to generate an oscillation signal at an initial frequency based upon a control input to vary an amplitude of the oscillation signal. A first frequency multiplier multiplies the oscillation signal to result in a first signal with first frequency and first undesired frequency components. A filter minimizes the first undesired frequency components of the first signal. A second frequency multiplier multiplies the first signal to result in the output oscillation signal with second frequency and second undesired frequency components. A second feedback circuit compares a predetermined range and at least one of the first signal and the output oscillation signal to result in a reference value. A first feedback circuit varies the control input based upon a comparison between the reference value and the amplitude of the oscillation signal to minimize the second undesired frequency components.
REFERENCES:
patent: 3223928 (1965-12-01), Fayman
patent: 3281648 (1966-10-01), Collins
patent: 3378769 (1968-04-01), Luzzatto
patent: 4121163 (1978-10-01), Fikart
patent: 4297654 (1981-10-01), Goerth
patent: 4320531 (1982-03-01), Dimon
patent: 5047734 (1991-09-01), Newell et al.
patent: 5077546 (1991-12-01), Carfi et al.
patent: 5113153 (1992-05-01), Soyuer
patent: 5113156 (1992-05-01), Mahabadi et al.
patent: 5396659 (1995-03-01), Kimura
patent: 5463356 (1995-10-01), Palmer
patent: 5552734 (1996-09-01), Kimura
patent: 5661424 (1997-08-01), Tang
patent: 5878332 (1999-03-01), Wang et al.
patent: 5912594 (1999-06-01), Burkhard
patent: 5959505 (1999-09-01), Ushiyama
patent: 6052036 (2000-04-01), Enström et al.
patent: 6064277 (2000-05-01), Gilbert
patent: 6100731 (2000-08-01), Otaka
patent: 6121849 (2000-09-01), McCollough et al.
patent: 6137375 (2000-10-01), Li
patent: 6252438 (2001-06-01), Sasaki
patent: 6278338 (2001-08-01), Jansson
patent: 6313712 (2001-11-01), Mourant et al.
patent: 6333679 (2001-12-01), Eriksson
patent: 6337604 (2002-01-01), Clarke
patent: 6340920 (2002-01-01), Tseng
patent: 6385266 (2002-05-01), Haberle et al.
patent: 6396659 (2002-05-01), Nakayama
patent: 6456143 (2002-09-01), Masumoto et al.
patent: 6466064 (2002-10-01), Kurogouchi et al.
patent: 6542042 (2003-04-01), Atkinson
patent: 6591091 (2003-07-01), Vorenkamp et al.
patent: 6696898 (2004-02-01), Ward et al.
patent: 7098753 (2006-08-01), Dumitrescu et al.
patent: 2001/0008430 (2001-07-01), Carr et al.
patent: 2001/0043109 (2001-11-01), Masumoto et al.
patent: 2001/0054919 (2001-12-01), Wang
patent: 2002/0125924 (2002-09-01), Kurogouchi et al.
patent: 2002/0183018 (2002-12-01), Veit
patent: 2003/0025537 (2003-02-01), Laws
patent: 2003/0119466 (2003-06-01), Goldman
patent: 2004/0056728 (2004-03-01), Dent et al.
patent: 2004/0140857 (2004-07-01), Ogiso
patent: 2005/0083140 (2005-04-01), Hashimoto
Magarit et al, A Low-Noise, Low-Power VCO with Automatic Amplitude Control for Wireless Applications, IEEE, pp. 761-771, Jun. 1999.
Zanchi et al, Impact of AAC Design on Phase Noise Performance of VCOs, IEEE, pp. 537-547, Jun. 2001.
Wenzel Associates, Inc., “VCXOs—Voltage-Controlled Crystal Oscillators,” Jun. 2003, located at http://www.wenzel.com/documents/vcxo.html.
Chattopadhyay, G. et al., “Frequency Multiplier Response to Spurious Signals and Its Effect on Local Oscillator Systems in Millimeter and Submillimeter Wavelengths,” Proceedings of the SPIE, Aug. 25-28, 2002.
Shin, H. et al., “A 1.8-V 6/9-GHz Switchable Dual-Band Quadrature LC VCO in SiGe BiCMOS Technology,” Proceedings of the 2002 IEEE Radio Frequency Integrated Circuits Symposium, Jun. 2-4, 2002.
Dumitrescu Gabriel-Gheorghe
Miller Richard
Opris Ion E.
Carr & Ferrell LLP
Duong Frank
Silicon Clocks Inc.
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