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. 24, 2000
Filed:
Feb. 09, 1998
Jerry L Proffitt, Wabash, IN (US);
Lawrence Edward Piekarski, Russiaville, IN (US);
Delco Electronics Corporation, Kokomo, IN (US);
Abstract
An improved method of operation for a microprocessor-based controller wherein a frequency limited counter can be used to generate low frequency PWM signals having on and/or off periods that exceed the period of the microprocessor's free-running counter. The improved method of operation involves comparing the requested PWM period (on or off) to the counter period, and determining if multiple counter periods are required to generate the requested PWM period. If multiple counter periods are required, the controller configures the PWM output port to maintain its current logic level until the requested period has timed out. In this way, the microprocessor can accurately generate the requested low frequency PWM output signals without requiring any hardware modifications.