Oscillators – Ring oscillators
Reexamination Certificate
2006-10-24
2006-10-24
Mis, David (Department: 2817)
Oscillators
Ring oscillators
C331S008000, C331S011000, C331S017000, C331S034000, C331S17700V
Reexamination Certificate
active
07126432
ABSTRACT:
A multi-phase realigned voltage-controlled oscillator (MRVCO) achieves phase realignment based on charge injection in the VCO stages with the injection amount proportional to the instantaneous phase error between the VCO output clock and a reference clock. The MRVCO may be incorporated as part of an implementation of a multi-phase realigned phase-locked loop (MRPLL). A separate phase detector, as well as a specific realignment charge pump, may be provided in the PLL for controlling the VCO. The VCO has lower phase modulation noise, so that the PLL has very large equivalent bandwidth.
REFERENCES:
patent: 4733200 (1988-03-01), Ecklund et al.
patent: 4761616 (1988-08-01), Ash
patent: 5061907 (1991-10-01), Rasmussen
patent: 5115212 (1992-05-01), Fenk et al.
patent: 5485128 (1996-01-01), Azuma
patent: 5495205 (1996-02-01), Parker et al.
patent: 5847616 (1998-12-01), Ng et al.
patent: 6148052 (2000-11-01), Bogdan
patent: 6188291 (2001-02-01), Gopinathan et al.
patent: 6353368 (2002-03-01), Iravani
patent: 6417740 (2002-07-01), Anh et al.
patent: 6466100 (2002-10-01), Mullgrav, Jr. et al.
patent: 6617936 (2003-09-01), Dally et al.
patent: 6621360 (2003-09-01), Xu et al.
patent: 6650190 (2003-11-01), Jordan et al.
patent: 6683506 (2004-01-01), Ye et al.
patent: 2002/0051509 (2002-05-01), Lindner et al.
patent: WO03063337 (2003-07-01), None
T.H. Lee et al., “Oscillator Phase Noise: A Tutorial”, IEEE Journal of Solid-State Circuits, vol. 35, No. 3, Mar. 2000, pp. 326-336.
F.M. Gardner, “Charge-Pump Phase-Lock Loops”, IEEE Transactions on Communications, vol. Com-28, No. 11, Nov. 1980, pp. 1849-1858.
A. Hajimiri et al., “Jitter and Phase Noise in Ring Oscillators”, IEEE Journal of Solid-State Circuits, vol. 34, No. 6, Jun. 1999, pp. 790-804.
N. Retdian et al., “Voltage Controlled Ring Oscillator with Wide Tuning Range and Fast Voltage Swing”, 3rdIEEE, Asia-Pacific Conference on ASICS, Aug. 6-8, 2002, Taipei, Taiwan, 4 pages.
T. Pialis et al., “Analysis of Timing Jitter in Ring Oscillators Due to Power Supply Noise”, 2003 IEEE Int'l Symposium on Circuits and Systems, May 25-28, 2003, Proceedings, vol. 1, pp. 681-684.
Website printout: “Low Phase Noise CMOS Ring Oscillator VCOs for Frequency Synthesis”, R.J. Betacourt Zamora et al., SMIRC Laboratory, Stanford University, http:// www-smirc.stanford.edu, Jul. 27, 1998, 19 pgs.
Ajram Sami
Roubadia Regis
Atmel Corporation
Mis David
Protsik Mark
Schneck Thomas
Schneck & Schneck
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