Systems and methods for voltage controlled oscillator...

Details Systems and methods for voltage controlled oscillator... Systems and methods for voltage controlled oscillator...

2008-05-09

2010-06-29

Chang, Joseph (Department: 2817)

Oscillators

With frequency calibration or testing

C331S011000, C331S034000, C331S17700V

Reexamination Certificate

active

07746182

ABSTRACT:
Various systems, methods and apparatus for calibrating a clock generating circuit are discussed herein. As one example, a method for calibrating a voltage controlled oscillator is disclosed. The method includes fixing the control voltage of a fine tune capacitor in the voltage controlled oscillator at a predetermined level. A binary search is performed in a digital circuit for a value of a calibration word that is used to enable switched capacitors in a coarse tune capacitor bank in the voltage controlled oscillator. The calibration word is fixed at the value determined by the binary search, and the control voltage of the fine tune capacitor is released to enable adjustment of the control voltage by a feedback signal to the voltage controlled oscillator.

REFERENCES:
patent: 6563387 (2003-05-01), Hirano et al.
patent: 6597249 (2003-07-01), Chien et al.
patent: 7023284 (2006-04-01), Sogawa et al.
patent: 2005/0083137 (2005-04-01), Lee et al.
patent: 2007/0247248 (2007-10-01), Kobayashi et al.

Affiliated with

Also associated with

Rating

Systems and methods for voltage controlled oscillator... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Systems and methods for voltage controlled oscillator..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for voltage controlled oscillator... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4219102