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:
Oct. 04, 1994
Filed:
Feb. 04, 1993
Applicant:
Inventor:
Dan Leonida, Ottawa, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03M / ;
U.S. Cl.
CPC ...
341122 ; 341155 ; 341162 ;
Abstract
In methods and apparatus for encoding a repetitive analog waveform as m n-bit digital words, p analog samples of the repetitive waveform are taken at each of m distinct sampling points, and q bits are derived from each distinct sample, where m, n, p and q are positive integers, p and q are less than n, and p.times.q=n. The methods and apparatus employ novel methods and apparatus for generating a pulse train having a precisely controlled duty cycle to define sampling times at which the samples are taken. The encoding methods and apparatus are useful for encoding high speed waveforms with relatively low speed circuitry.