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:
Dec. 07, 2010
Filed:
Dec. 26, 2006
Chongshan Yang, Mie-ken, JP;
Hiroshi Ozaki, Kanagawa-ken, JP;
Hiroyuki Tanaka, Minato-ku, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A pulse width modulation device which a step form control signal generated by a control signal generating device and a triangular wavecarrier signal generated by a carrier generating device are compared by a digital comparator and the comparison signal is supplied to an edge detection device. Also, a top/bottom signal generated by a top/bottom signal generating device is supplied to the edge detection device. The edge detection device includes an edge detection function that generates an edge detection signal by detecting change of the comparison signal. The edge detection function is inhibited by the edge detection signal; and inhibition is cancelled by the top/bottom signal so that the edge detection signal is output. A PWM signal is output from the pulse generating device in accordance with the comparison signal, edge detection signal, and top/bottom signal.