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. 05, 1990
Filed:
May. 26, 1989
Masayuki Aoki, Ichinomiya, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A high-frequency heating source supplies a predetermined high-frequency heating power. An AC input is supplied to an inverter circuit. The inverter circuit generates a high-frequency output signal for driving the high-frequency heating source. The inverter circuit comprises a rectifier circuit for rectifying the AC input, and a switching element for switching the DC output supplied from the rectifier circuit. The inverter circuit is controlled by an inverter control circuit. A processor supplies set heating-output data associated with the high-frequency heating power to the inverter control circuit. The inverter control circuit comprises a counter and an on/off signal generator. The counter is set to a on-period in accordance with the set heating-output data, and performs counting operation. The on/off signal generator generates an on/off signal in accordance with a count value of the counter. A driving circuit drives the switching element of the inverter circuit in response to the on/off signal supplied from the inverter control circuit.