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:
Apr. 23, 2002
Filed:
Aug. 01, 2000
Frank G. Cooper, Dix Hills, NY (US);
Keystone Thermometrics, St. Marys, PA (US);
Abstract
Apparatus, specifically a circuit ( ), for a highly accurate, low cost temperature sensor, particularly one using silicon thermometry and which can be implemented by an application specific integrated circuit, that also possesses a high degree of linearity and a wide dynamic range. The inventive circuit advantageously utilizes either a mixed-signal approach or a digital core and provides independent adjustment, through two point calibration, of slope and ambient output offset values, with a zero offset adjustment advantageously accomplished through use of a digital tear. Specifically, given the inherent linearity of silicon thermometry, zero offset and desired output voltage are set, independently of each other, at a first predefined ambient calibration temperature as effectively two separate offset values, while slope (span) is set at a second predefined calibration temperature (typically a full scale temperature) different from the first temperature.