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:
Apr. 11, 1989
Filed:
Aug. 26, 1987
Robert R Cordell, Tinton Falls, NJ (US);
Bell Communications Research, Inc., Livingston, NJ (US);
Abstract
The circuit phase aligns a phase-varying input data stream with a local clock. The data stream is sampled at the 0.degree. and 180.degree. phases of the local clock. Two pairs of outrigger samples which closely bracket the aforementioned primary samples are also obtained by the sextet sampler. Adjacent pairs of the six samples are applied to Ex-Or gates to yield disagreement signals which indicate the locations of data transitions relative to the samples. The primary samples (0.degree. and 180.degree.) are serially loaded into different halves of a biphase register, the taps of which provide the output with differently delayed versions of the input data at either 0.degree. or 180.degree.. A control circuit analyzes the disagreement signals and provides control signals to a counter which determines which of the biphase register taps is connected to the output. The output is a replica of the input which is synchronized with the local clock.