The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2006
Filed:
Sep. 08, 2003
John G. Maneatis, Los Altos, CA (US);
John G. Maneatis, Los Altos, CA (US);
True Circuits, Inc., Los Altos, CA (US);
Abstract
A phase-locked loop system, including a voltage controlled oscillator coupled with an error detector in a feedback configuration, so as to produce an output signal having a desired characteristic that is based on a reference signal. The system also includes a charge pump system coupled with the voltage controlled oscillator and configured to produce currents to control phase and frequency of the output signal. The charge pump system includes at least two charge pumps, one being configured to effect more rapid changes in the output signal than the other. This charge pump may be configured to deliver a higher charge pump current than the other charge pump, and/or may be activated intermittently upon detection of cycle slippage or another condition detectable during operation of the phase-locked loop system.