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. 06, 2010
Filed:
Feb. 28, 2008
Heyon Min Bae, Champaign, IL (US);
Naresh Ramnath Shanbhag, Champaign, IL (US);
Andrew C. Singer, Champaign, IL (US);
Jonathan B. Ashbrook, Homer, IL (US);
Heyon Min Bae, Champaign, IL (US);
Naresh Ramnath Shanbhag, Champaign, IL (US);
Andrew C. Singer, Champaign, IL (US);
Jonathan B. Ashbrook, Homer, IL (US);
Finisar Corporation, Sunnyvale, CA (US);
Abstract
Methods and systems are provided for an improved phase detector utilizing analog-to-digital converter (ADC) components. In an embodiment, the method includes from an ADC having a sampling clock signal that determines sampling instants, obtaining a first comparison value between an analog signal and a first threshold voltage at a first sampling instant, and obtaining a second comparison value between the analog signal and a second threshold voltage at a second sampling instant. The method further includes, from a supplemental circuit, obtaining a third comparison value between the analog signal and a third threshold voltage at a third sampling instant between the first and second sampling instants. The method further includes processing the first, second, and third comparison values to determine a phase relationship between the analog signal and the sampling clock.