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:
Jun. 10, 2014
Filed:
Aug. 15, 2012
Masanori Tanaka, Kanagawa, JP;
Morihisa Hirata, Kanagawa, JP;
Hitoshi Okamoto, Kanagawa, JP;
Renesas Electronics Corporation, Kawasaki-shi, Kanagawa, JP;
Abstract
A protection circuit includes a first power supply system including a first power supply and a first ground, a second power supply system including a second power supply and a second ground, and a control circuit that, when coupled to an electro-static discharge (ESD) stress being applied to the first power supply system, controls a first switch. The first switch is provided between the signal line and the first ground. The control circuit includes a capacitance element, a resistance element in series with the capacitance element, and an inverter, an output of the inverter being connected between a gate of the first switch, an input of the inverter being connected to a connecting point between the capacitance element and the resistance element.