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. 08, 2009
Filed:
May. 26, 2005
Toshiro Okubo, Kyoto, JP;
Toshiro Okubo, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A coil load driving circuit in which generation of radiation noise when a motor is stationary is minimized, includes output buffers that output a PWM pulse to both terminals of a motor; a transfer voltage generating circuit that outputs transfer voltages V, Vproportional to the difference between an input control voltage Vand input reference voltage V; PWM comparators that output PWM signals PW, PWcorresponding to the transfer voltages V, V; and an output PWM pulse synthesis circuit that controls the output buffer in accordance with an AND signal of the PWM signal PWand an exclusive OR signal EX of the PWM signals PWand PW, and controls the output buffer in accordance with an AND signal of the PWM signal PWand the exclusive OR signal EX.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile