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. 19, 2012
Filed:
May. 11, 2007
Applicants:
Erwan Hemon, Goyrans, FR;
Philippe Lance, Toulouse, FR;
Inventors:
Erwan Hemon, Goyrans, FR;
Philippe Lance, Toulouse, FR;
Assignee:
Freescale Semiconductor, Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F23Q 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A driving circuit for generating a required firing current for a safety device comprising an arrangement of a first transistor (M) connected in series with a second transistor (M); and a power control transistor (M) connected in series with the first transistor; characterised in that the first and second transistors operate in fully switched on mode (Rds(on)) and the required firing current (I(squib)) is generated by means of varying the voltage (Vc) across the gate source of power control transistor and the first and second transistors in a predetermined manner.