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:
May. 28, 1996
Filed:
Jun. 21, 1995
Paul M Elliott, Jenner, CA (US);
DSC Communications Corporation, Plano, TX (US);
Abstract
A numerically controlled oscillator (10) includes a difference engine (12) that receives a numerator signal (14) and a numerator minus denominator signal (16). The numerator signal (14) and the numerator minus denominator signal (16) represent constant input values for a desired fractional relationship between a sine wave output signal (34) and a sample clock input signal (20) of numerically controlled oscillator (10). The difference engine (12) generates a difference output signal (18) that is received by a phase adder (22) for adding either a one or a zero to a combination of the delta phase input signal (24) and a phase accumulator output signal (26). The difference engine (12) optimally distributes ones and zeros so as to minimize phase jitter in the output signal (34).