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:
May. 20, 2003
Filed:
Feb. 12, 2002
Abhijeet V. Chavan, Carmel, IN (US);
Gregory J. Manlove, Kokomo, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
A non-linear temperature compensation circuit ( ) is provided for generating at least dual-slope characteristics responsive to changes in operating temperature of the compensation circuit. The compensation circuit includes a temperature dependent current generator circuit ( ) for generating at least one output (I ) substantially proportional to changes in the temperature of the circuit, a current-based dual-slope drift generator ( ) for generating a current proportional to absolute temperature, and a summing means ( ) for summing both current outputs and generating a compensation drift voltage. The temperature dependent current generator includes a sub-circuit having a first current generator that generates a current (I ) that is relatively independent of temperature, and a second current generator that generates a second current (I ) that decreases with increases in temperature. The two currents are compared and a non-zero output current (I ) is generated if the second current (I ) exceeds the first current (I ), which output current (I ) decreases with increases in temperature.