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:
Jan. 04, 2005
Filed:
Jan. 28, 2003
Christophe Premont, Grenoble, FR;
David Chesneau, Markt Schwaben, DE;
Christophe Bernard, Claix, FR;
Christophe Premont, Grenoble, FR;
David Chesneau, Markt Schwaben, DE;
Christophe Bernard, Claix, FR;
STMicroelectronics S.A., , FR;
Abstract
A ramp capacitor CAPhas a first terminal connected to a power supply voltage VBAT. A generator circuit is connected to a second terminal of the ramp capacitor and adapted to generate a voltage ramp at the terminals of the ramp capacitor. The generator circuit includes a constant current source SCC connected to the second terminal Bof the ramp capacitor CAPand auxiliary circuit MAX adapted in the presence of a transient variation of the power supply voltage to determine the transient current flowing in the ramp capacitor and generated by the transient variation. Responsive thereto, delivery is made to the second terminal Bof the ramp capacitor CAPof a charging current equal to the algebraic sum of the constant current delivered by the constant current source and an auxiliary current equal and opposite to the transient current.