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. 20, 2004
Filed:
Sep. 18, 2002
Ronald Arp, Greeley, CO (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A frequency lock loop has a reloadable N counter that counts cycles of an output frequency during one cycle of a reference frequency. A VCO generates the output frequency. A VCO control drives the VCO based on the count from the counter. The VCO control may include a latch for latching the count at each reference frequency cycle. The VCO control may include a VCO driver, such as a D/A converter or proportional charge pump, connected to a voltage control as input to the VCO. The counter may be reloaded with the integer N value at each cycle of the reference frequency. The counter may decrement from the integer value at each cycle of the output frequency. A lock may occur at N times the reference frequency without regard to phase between output and reference frequencies.