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. 13, 2012
Filed:
Jan. 17, 2012
Takao Kuroda, Nagoya, JP;
Takao Kuroda, Nagoya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A control circuit controls a driving transistor connected in series with an electrical load between a power supply voltage and a ground. The control circuit includes a pull-up resistor connected at one end to a power supply voltage side of the driving transistor, a current detection resistor for detecting an electric current flowing from the driving transistor to the ground, a current mirror circuit including a starting transistor connected between the pull-up transistor and the current detection resistor. The current mirror circuit supplies a mirror current of the electric current. The control circuit further includes a current source circuit for supplying a driving current to a control terminal of the driving transistor in accordance with the mirror current to turn ON the driving transistor in response to an external control signal.