Oscillators – Amplitude control or stabilization
Reexamination Certificate
2006-08-29
2006-08-29
Chang, Joseph (Department: 2817)
Oscillators
Amplitude control or stabilization
C331S185000
Reexamination Certificate
active
07098753
ABSTRACT:
A circuit for varying an amplitude of an oscillation signal comprises an oscillator, signal processing circuitry, a first feedback circuit, and a second feedback circuit. The oscillator generates the oscillation signal and has a control input to vary the amplitude of the oscillation signal. The signal processing circuitry processes the oscillation signal. The first feedback circuit is configured to control the control input of the oscillator by comparing a reference value and an input amplitude of an input of the signal processing circuitry. The second feedback circuit generates the reference value by comparing an output amplitude of an output of the signal processing circuitry and a predetermined value.
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), Enstrom 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: 6313712 (2001-11-01), Mourant et al.
patent: 6333679 (2001-12-01), Eriksson
patent: 6340920 (2002-01-01), Tseng
patent: 6385266 (2002-05-01), Haberle et al.
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: 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
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
Opris Jon E.
Carr & Ferrell LLP
Chang Joseph
Silicon Clocks Inc.
LandOfFree
Oscillator with variable reference does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Oscillator with variable reference, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Oscillator with variable reference will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3692398