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:
Apr. 08, 2008
Filed:
Feb. 17, 2006
David Meltzer, Wappinger Falls, NY (US);
David Meltzer, Wappinger Falls, NY (US);
Seiko Epson Corporation, Tokyo, JP;
Abstract
Circuits and methods for compensating a variable oscillator for process and/or operational variations. The circuit generally comprises (a) a replica oscillator, (b) a counter configured to count pulses of the replica oscillator and to produce a count signal, and (c) a compensation circuit configured to provide an adjustment signal to the variable oscillator in accordance with the count signal. The method generally comprises the steps of (a) counting the number of pulses of a replica oscillator signal, and (b) providing an adjustment signal to the variable oscillator in accordance with the number of pulses counted. The present invention advantageously provides a largely digital method to compensate a variable oscillator for process, voltage, and temperature variations.