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:
Dec. 17, 1996
Filed:
Dec. 04, 1995
Laurent Guillon, Panazol, FR;
Didier Tassel, Quesnoy-Sur-Deule, FR;
Legrand S.A., Limoges, FR;
Abstract
A solid-state switch is connected in series with a load between the poles of an electrical power supply. It includes an isolated gate bipolar transistor with an emitter connected to the internal ground and connected to the load and a collector connected to one pole of the supply and driving an input of a subtractor the other input of which is connected to receive a set point voltage. The output of the subtractor drives a feedback system connected to the gate of the transistor. The voltage at the gate is then representative of the current in the switch and is applied to interrupter means which sends a turn-off signal if the gate voltage exceeds a (triggering) threshold value. The turn-off signal sends to a switching circuit a turn-off voltage which produces a turn-off bias and disables the feedback circuit.