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:
Mar. 24, 2015
Filed:
Oct. 23, 2012
Applicant:
Microchip Technology Incorporated, Chandler, AZ (US);
Inventors:
Darren Edward Noel Wenn, Buckinghamshire, GB;
James E. Bartling, Chandler, AZ (US);
Assignee:
Microchip Technology Incorporated, Chandler, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01K 7/16 (2006.01); G01K 3/10 (2006.01); G01K 7/34 (2006.01); G01K 7/22 (2006.01);
U.S. Cl.
CPC ...
G01K 7/22 (2013.01); G01K 7/34 (2013.01); G01K 7/16 (2013.01);
Abstract
Temperature is determined by measuring the time it takes to charge a capacitor with a resistive temperature sensor. A clock, time counter, a voltage comparator and voltage reference are used in determining a coarse time measurement. The time measurement resolution is enhanced with the addition of a constant current source charging another timing capacitor within a single clock pulse time to provide a fine time measurement.