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:
Jun. 22, 1993
Filed:
May. 27, 1992
Tatsuya Nakagawa, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
An inverter power supply, for driving a magnetron or the like, where an A.C. voltage from a commercial A.C. power source is rectified to obtain a D.C. voltage which then is switched periodically by a switching device to be converted to a high frequency which then is converted to a D.C. to obtain a predetermined D.C. output. The inverter power supply includes a modulation circuit for amplitude-modulating an output control voltage responsive to the an output value of the D.C. output by an A.C. input voltage from the commercial A.C. power source to obtain an object input waveform; a difference output circuit for taking difference between the object input waveform obtained by the modulation circuit and an input current waveform from the commercial A.C. power source; and a control circuit for controlling an ON period of the switching device responsive to a difference output from the difference output circuit.