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. 20, 2021
Filed:
Aug. 27, 2020
Fujitsu Limited, Kawasaki, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A clock data recovery circuit includes a circuit that receives a data signal for which each of a plurality of potential levels is associated with a value of 2 bits or more, based on a result of a first comparison that compares the 3 or more first thresholds with the data signal at timing synchronized with a clock signal; a circuit that outputs a result of a second comparison that compares the data signal with a second threshold at the timing; a circuit that generates a phase difference signal indicating whether to advance or delay a phase of the clock signal, based on the result of the determination and the result of the second comparison; a filter that generates a phase adjusted value indicating an adjustment amount of the phase, based on the phase difference signal; and a circuit that adjusts the phase based on the phase adjusted value.