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:
Oct. 12, 2004
Filed:
Oct. 24, 2002
Philippe Messager, Nantes, FR;
Atmel Nantes S.A., Nantes, FR;
Abstract
A power supply controller for electronic circuits, supplying a power supply voltage (VDC) and preventing operation of the said circuit by using a RESET signal when the said power supply voltage is less than a first predetermined threshold. The controller includes a first comparator (C ) comparing a voltage proportional to the power supply voltage with a reference voltage and activating the reset signal when the voltage proportional to the power supply voltage is less than the reference voltage. A bandgap module supplies a principal reference voltage (VBGAP). Preliminary reference devices immediately supply a preliminary reference voltage (V ), less than the principal reference voltage. Control circuits receive the preliminary reference voltage (V ) and the principal reference voltage (VBGAP) and automatically activate the RESET signal for as long as the principal reference voltage (VBGAP) has not reached a second predetermined threshold.