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. 10, 2012
Filed:
Mar. 14, 2008
Jaeha Kim, Los Altos, CA (US);
Hae-chang Lee, Los Altos, CA (US);
Thomas H. Greer, Iii, Chapel Hill, NC (US);
Jaeha Kim, Los Altos, CA (US);
Hae-Chang Lee, Los Altos, CA (US);
Thomas H. Greer, III, Chapel Hill, NC (US);
Rambus Inc., Sunnyvale, CA (US);
Abstract
A circuit to test phase linearity of a phase synthesizer, which synthesizes an output clock having a phase corresponding to a digital phase value input to the phase synthesizer. A digital counter provides the digital phase value to the phase synthesizer. The digital counter receives a counter clock synchronized with an input clock. The digital phase value is stepped by the digital counter, thereby shifting the frequency of the output clock. The output clock is analyzed with respect to phase linearity of the phase synthesizer to produce a phase linearity analysis output.