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. 31, 1988
Filed:
Feb. 21, 1986
Peter Staley, Kings Park, NY (US);
David Coyne, Glenrothes, GB;
General Instrument Corp., New York, NY (US);
Abstract
The input digital signal is applied to a transition detector which causes an up/down counter to increment or decrement each time a transition is detected. The output of the counter is utilized to address a read only memory (ROM) which, in turn, generates binary words representing first and second integers. These binary words are used to control a programmable divider to generate an output having a frequency which moves between two values corresponding to the digital input. The rate at which the frequency changes between the two values is controlled by the ROM contents. In the implementation, the frequency changes with a raised cosine shape.