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:
Dec. 04, 2012
Filed:
Jun. 08, 2009
Gayathri A. Bhagavatheeswaran, Austin, TX (US);
Lipeng Cao, Austin, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Gayathri A. Bhagavatheeswaran, Austin, TX (US);
Lipeng Cao, Austin, TX (US);
Hector Sanchez, Cedar Park, TX (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A phase locked loop device includes a phase detector that measures a difference in phase between a reference clock signal and an output clock signal of the phase locked loop. The phase detector provides a pulse having a width indicative of the phase difference. A phase measurement module determines a digital value based on the pulse width. Accordingly, the digital value provides an indication of the phase difference between the reference clock signal and the output clock signal. A series of the digital values can be recorded to indicate how the phase difference varies over time, thereby providing a useful characterization of device behavior.