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. 25, 2025
Filed:
Apr. 28, 2022
Advantest Corporation, Tokyo, JP;
Kiyotaka Kasahara, Tokyo, JP;
ADVANTEST Corporation, Tokyo, JP;
Abstract
A protective circuit that protects a semiconductor switch includes a group of terminals consisting of either one or more input terminals and two or more output terminals, or one or more output terminals and two or more input terminals, a first resistive circuit, connected to one of the terminals, comprising a resistor having a first temperature coefficient of resistance; and a second resistive circuit, connected to another one of the terminals, comprising a resistor having a second temperature coefficient of resistance different in temperature characteristics from the first temperature coefficient of resistance. The protective circuit is electrically connected to a control terminal of the semiconductor switch, and shuts off a passing current of the semiconductor switch when a temperature of the semiconductor switch is equal to or higher than a current shut-off temperature.