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. 03, 2003
Filed:
May. 16, 2001
Bertrand Rivet, Saint Cyr sur Loire, FR;
Robert Pezzani, Vouvray, FR;
STMicroelectronics S.A., Montrouge, FR;
Abstract
The invention concerns a control circuit for controlling a load to be supplied in alternating current voltage, comprising a two-way switch capable of being controlled by phase angle, in series with the load between two terminals applying the alternating current supply, and comprising, in parallel with the switch, a first resistive element, a first capacitor and an element, in series with the first resistive element and the first capacitor, and operating, in steady state conditions, as a constant current source, the midpoint of the association in series connection of the first resistive element and the first capacitor being connected, via an element with two-way conduction automatically triggered when the voltage at its terminals exceeds a predetermined threshold, to a terminal controlling the switch.