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:
Oct. 17, 2006
Filed:
Nov. 24, 2004
Masayuki Hirabayashi, Fukuoka, JP;
Hirotaka Yamamoto, Fukuoka, JP;
Eiji Yoshida, Fukuoka, JP;
Toru Yoshino, Fukuoka, JP;
Masayuki Hirabayashi, Fukuoka, JP;
Hirotaka Yamamoto, Fukuoka, JP;
Eiji Yoshida, Fukuoka, JP;
Toru Yoshino, Fukuoka, JP;
Mitsumi Electric Co., Ltd., Tokyo, JP;
Abstract
A DC/DC converter has a transformer having a primary winding, a secondary winding, and an auxiliary winding, a switching transistor connected in series to the primary winding, a control transistor for turning the switching transistor on or off, and a feedback control circuit connected to the control transistor and the auxiliary winding. The feedback control circuit includes a Zener diode having a substantially zero temperature coefficient. The Zener diode has a Zener voltage which lies in a range between 5 volts and 6 volts. In order to cancel a temperature characteristic of the control transistor, the temperature coefficient of the Zener diode is selected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile