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:
Nov. 18, 2014
Filed:
Jul. 27, 2011
Takeshi Inoue, Nagoya, JP;
Masakiyo Sumitomo, Okazaki, JP;
Takeshi Inoue, Nagoya, JP;
Masakiyo Sumitomo, Okazaki, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A drive controller for driving an inductive load connected to a node between first and second switches connected in series with a direct current voltage source includes a first diode, a series circuit of a second diode and an inductor, and a control circuit. The first diode is a parasitic diode of the first switch and connected in antiparallel with the first switch. The series circuit is connected in parallel with the first diode. The control circuit drives the inductor load by applying a control voltage to the first switch before applying a first ON-voltage to the second switch. The first ON-voltage turns ON the second switch. The control voltage is greater than zero and less than a second ON-voltage. The second ON-voltage turns ON the first switch. The control voltage causes the first switch to operate in weak inversion.