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:
Apr. 27, 1982
Filed:
Sep. 09, 1980
Michiyuki Horiguchi, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A DC power supply circuit includes a blocking oscillator circuit of the transistor saturation type, an error detection circuit for detecting difference between an output voltage level and a preselected reference level, and a control circuit. At the start of the circuit operation, the blocking oscillator circuit is controlled in the self oscillation mode, and thereafter, controlled in the separate excitation mode. The control circuit responds to an output signal of the error detection circuit and functions to lengthen an ON period of a switching transistor included in the blocking oscillator circuit when the output voltage level is lower than the preselected reference level. Contrarily, when the output voltage level is higher than the preselected reference level, the ON period of the switching transistor is shortened.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile