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:
Aug. 11, 1987
Filed:
Oct. 01, 1984
Masayuki Katto, Nagoya, JP;
Eiichi Sugishima, Nagoya, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A wave generation circuit for a pulse width modulation inverter generates a plurality of differently phased waves which are modulated to form driving signals for switching elements in the inverter. This circuit has a single memory element having waveform data stored therein and also has an operation circuit for providing phase address signals which indicate the address of the waveform data corresponding to each phase. The data at the indicated addresses are read out of the memory element and latched by a phase latch circuit for each phase. When all of the stored data corresponding to each phase have been latched, the operation circuit transmits an output timing signal to cause the phase latch circuits to simultaneously provide the latched data which form driving signals for the switching elements.