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, 2011
Filed:
May. 21, 2009
Tomoharu Hayakawa, Kasugai, JP;
Hiroyuki Morita, Kariya, JP;
Hitoshi Ishikawa, Tokyo, JP;
Tatsuya Aizawa, Tokyo, JP;
Yu Takeuchi, Tokyo, JP;
Tomoharu Hayakawa, Kasugai, JP;
Hiroyuki Morita, Kariya, JP;
Hitoshi Ishikawa, Tokyo, JP;
Tatsuya Aizawa, Tokyo, JP;
Yu Takeuchi, Tokyo, JP;
Denso Corporation, Kariya, JP;
Abstract
A microcomputer includes: a CPU executing a predetermined calculation process; and a PWM timer generating a PWM pulse. The PWM timer includes a RAM for storing a duty value of the PWM pulse and a PWM controller for generating the PWM pulse. The PWM controller includes a PWM counter for counting up from a predetermined value as an initial value. The PWM pulse has an unit waveform, which is generated based on comparison between the duty value of the RAM and an output value of the PWM counter. The RAM outputs a new duty value at every comparison without functioning the CPU so that the duty value of the PWM pulse is changed in chronological order.