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:
Feb. 13, 1996
Filed:
Nov. 14, 1994
Ramon S Co, Milpitas, CA (US);
Ron Kao, San Jose, CA (US);
3Com Corporation, Santa Clara, CA (US);
Abstract
A digital phase-locked data recovery circuit having improved noise immunity. The data recovery circuit includes a multi-phase clock for supplying clock signals having a predetermined relative phase relationship. A snap shot sampling network takes samples of an input data signal in response to the multi-phase clock signals. The samples are preferably collected during the duration of boundary sampling windows encompassing transitions in the input data signal. The present invention further includes a network for comparing the received data samples with a sample pattern. A phase encoder then generates error signals in response to the phase comparisons. A phase decoder adjusts the phase of the boundary window in response to the error signal.