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:
Nov. 08, 2005
Filed:
Dec. 10, 2003
Daniel A. Berkram, Fort Collins, CO (US);
Perry M. Wyatt, Fort Collins, CO (US);
Daniel A. Berkram, Fort Collins, CO (US);
Perry M. Wyatt, Fort Collins, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
Quadrature clock generating apparatus includes a multiplexer selecting one of a generated clock and a gated generated clock as a double clock in accordance with a halt multiplexer control. Divider circuitry provides an alignment signal corresponding to an inverted double clock divided by two. A recovery circuit recovers first and second clocks having a 90° phase difference from the double clock in accordance with the alignment signal. A halt circuit controls the halt multiplexer control to select the gated generated clock when the alignment signal matches a pre-determined clock level. The halt multiplexer control is clocked by the generated clock.