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:
Nov. 08, 2016
Filed:
Feb. 27, 2014
Cavium, Inc., San Jose, CA (US);
Ethan Crain, Northborough, MA (US);
Cavium, Inc., San Jose, CA (US);
Abstract
An improved clock data recovery circuit is provided which provides lower bit error rates and faster locking times. In an embodiment, the circuit includes a voter having one or more voter inputs. The voter may generate up votes indicative of a recovered clock having a negative phase offset relative to a given voter input, or down votes indicative of the recovered clock having a positive phase offset. The circuit may include a comparator configured to output a phase adjustment signal and a tie signal. The circuit may further include an M-depth shift register and a multiplexer configured to select either the phase adjustment signal or an output from the shift register as a multiplexer output. The circuit may further include a flip-flop that generates a phase adjustment output signal. The shift register may receive the phase adjustment output signal at a data input of the shift register.