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. 02, 2007
Filed:
Dec. 15, 2004
Robert Mikyska, Dolni Dobrouc, CZ;
Robert Mikyska, Dolni Dobrouc, CZ;
STMicroelectronics, Inc., Carrollton, TX (US);
Abstract
A reset circuit includes a power supply supplying a power supply voltage, and a band-gap reference that generates a voltage reference signal. A resistor start-up circuit is responsive to the voltage reference signal, and further responsive to an increase in the power supply voltage. The resistor start-up circuit generates a first current when the power supply voltage increases to a first predetermined voltage, and further generates a second current when the power supply voltage increases to a second predetermined voltage. When the second current generated by the resistor start-up circuit is supplied to a resistor divider, the resistor diver delivers an output voltage that is a predetermined portion of the power supply voltage. A comparator compares the voltage reference signal with the resistor divider output voltage, and generates a reset signal when the resistor divider output voltage equals the voltage reference signal.