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:
May. 06, 2014
Filed:
Jul. 29, 2009
William W. Walker, Los Gatos, CA (US);
H. Anders Kristensson, Los Gatos, CA (US);
Nikola Nedovic, San Jose, CA (US);
Nestor Tzartzanis, Redwood City, CA (US);
William W. Walker, Los Gatos, CA (US);
H. Anders Kristensson, Los Gatos, CA (US);
Nikola Nedovic, San Jose, CA (US);
Nestor Tzartzanis, Redwood City, CA (US);
Fujitsu Limited, Kawasaki-shi, JP;
Abstract
In one embodiment, a circuit includes a voltage-controlled oscillator (VCO) configured to generate k first clock signals that each have a first phase based on a charge-pump control voltage signal; one or more phase interpolators (PIs) configured to receive the k first clock signals and one or more first feedback controls signals and generate m second clock signals that each have a second phase based on the k first clock signals and the one or more first feedback control signals; a first phase detector (PD) configured to receive the m second clock signals and generate the one or more first feedback control signals based on the m second clock signals; a second PD configured to generate one or more second feedback control signals based on the m second clock signals; and a charge pump configured to output the charge-pump control voltage signal based on the second feedback control signals.