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:
Apr. 30, 2002
Filed:
May. 21, 1998
Applicant:
Inventors:
André Bremond, Veretz, FR;
Philippe Merceron, Vernon, FR;
Assignee:
SGS-Thomson Microelectronics S.A., Gentilly, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 3/00 ;
U.S. Cl.
CPC ...
G08B 3/00 ;
Abstract
The present invention relates to a control circuit of a vibrating membrane excited by a solenoid in series with a d.c. supply and a controlled switch. A capacitor is disposed across a series circuit including the solenoid and the switch associated with opening means in the vicinity of a zero crossing of the current in the inductance.