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:
Mar. 09, 2010
Filed:
Nov. 10, 2006
Applicants:
Keiichi Sekiguchi, Niiza, JP;
Kazuya Aizawa, Niiza, JP;
Inventors:
Keiichi Sekiguchi, Niiza, JP;
Kazuya Aizawa, Niiza, JP;
Assignee:
Sanken Electric Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A composite integrated circuit incorporating two LDMOSFETs of unlike designs, with the consequent creation of a parasitic transistor. A multipurpose resistor is integrally built into the composite integrated circuit in order to prevent the parasitic transistor from accidentally turning on. In an intended application of the composite integrated circuit to a startup circuit of a switching-mode power supply, the multipurpose resistor serves as startup resistor for limiting the flow of rush current during the startup period of the switching-mode power supply.