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. 08, 2011
Filed:
Jun. 17, 2008
Yoshihiro Fukano, Moriya, JP;
Masami Yoshida, Ryugasaki, JP;
Yoshitada Doi, Koshigaya, JP;
Shigeharu Oide, Adachi-ku, JP;
Yoshihiro Fukano, Moriya, JP;
Masami Yoshida, Ryugasaki, JP;
Yoshitada Doi, Koshigaya, JP;
Shigeharu Oide, Adachi-ku, JP;
SMC Kabushiki Kaisha, Tokyo, JP;
Abstract
A current detection circuit generates a pulse signal Sd based on a voltage Vd corresponding to a current I flowing through a solenoid coil, and feeds the pulse signal Sd back to a PWM circuit of a switch controller. The PWM circuit generates a pulse signal Sr having a predetermined duty ratio, based on a comparison between the fed back pulse signal Sd and a voltage value corresponding to a first current value or a second current value, and supplies the pulse signal Sr to a pulse supplying unit. The pulse supplying unit supplies the pulse signal Sr as a first pulse signal Sand/or a second pulse signal Sto a gate terminal G of a MOSFET.