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. 03, 1994
Filed:
May. 20, 1993
Kazuyuki Takada, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A clock signal is applied to an UP/DOWN counter, which counts up the clock signal from zero up to a predetermined value and then counts down from the predetermined value to zero, and thereby a triangular wave signal representing counted value is output therefrom; three threshold values which are different each other are selected between zero and the predetermined value in advance, and they are set in three digital comparators, respectively; in each digital comparator, the threshold value is compared with a level of the triangular wave signal, and when the threshold value is larger than the level of the triangular wave signal, a high level signal is output from each digital comparator, the high level signal is delayed by a predetermined delay time and three-phase PWM signal is generated.