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. 12, 1994
Filed:
Jun. 29, 1990
Peter T McLean, Colorado Springs, CO (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A digital communication system using a frequency-independent, high data transmission rate, self-clocking, d.c. balanced data encoding technique. The encoding technique converts two NRZ data bits into a pulse or pulse-pair. The form of the pulse or pulse-pair representing the encoded data bit-pair depends upon the average d.c. level of the previously transmitted pulses. Each pulse of a pulse-pair has a fixed width. The receiver is activated by the leading edge of a transmitted pulse-pair and samples the pulse-pair at points in time determined by the known fixed width of the pulses. The sampled pulse-pairs are then converted into NRZ data bit-pairs. Proper functioning of the receiver does not rely upon the rate upon which the data is transferred. A high data rate is achieved by encoding two bits of data in every pulse or pulse-pair transmitted.