Voltage-controlled oscillator with multi-phase realignment...

Details Voltage-controlled oscillator with multi-phase realignment... Voltage-controlled oscillator with multi-phase realignment...

2006-07-11

2008-03-04

Mis, David (Department: 2817)

Oscillators

Ring oscillators

C331S008000, C331S011000, C331S017000, C331S034000, C331S17700V

Reexamination Certificate

active

07339439

ABSTRACT:
A multi-phase realigned voltage-controlled oscillator (MRVCO) achieves phase realignment based on charge injection in the VCO stages. The individual VCO stages provide an oscillating output signals having an asymmetric waveform with substantially different rise and fall times. This ensures that the VCO as a whole has a multiphase impulse response to the charge injection that is strictly positive or strictly negative, and substantially constant so as to be independent of the VCO phase or timing of charge injection. The MRVCO may form a component part of an implementation of a multi-phase realigned phase-locked loop (MRPLL).

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: 7020229 (2006-03-01), Lindner et al.
patent: 7126432 (2006-10-01), Roubadia et al.
patent: WO03/063337 (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”, IEEE, 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. Betancourt Zamora and T.H. Lee, SMIRC Laboratory, Stanford Univ., http:// www-smirc.stanford.edu., Jul. 27, 1998, 19 pgs.

Affiliated with

Also associated with

Rating

Voltage-controlled oscillator with multi-phase realignment... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voltage-controlled oscillator with multi-phase realignment..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voltage-controlled oscillator with multi-phase realignment... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3969330