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:
Jul. 10, 1990
Filed:
Mar. 31, 1989
Thomas J Sheahan, Cary, IL (US);
Digital Appliance Controls, Inc., Hoffman Estates, IL (US);
Abstract
Generally there is provided circuitry and a method for frequency multiplication of a first signal source including a first counter for counting pulses from a second signal of higher frequency by counting from a loaded value and generating a circuit output each time the first counter resets. A second counter is used to count cycles of the first counter and generate a feedback signal when a predetermined number of cycles have been completed (the system multiplication factor). Calibration is achieved by comparing the end of the period of the first signal to the occurrence of a feedback signal. In response the comparision circuit causes the loaded value to be changed to thereby control the output.