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:
Nov. 25, 1986
Filed:
Sep. 23, 1985
Applicant:
Inventor:
Eduard F Boeckmann, Huntsville, AL (US);
Assignee:
GTE Communication Systems Corp., Northlake, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; G01K / ;
U.S. Cl.
CPC ...
307310 ; 307254 ; 3072 / ; 307303 ; 374178 ;
Abstract
An electrical circuit functioning as a temperature sensor which is fully compatible with silicon chip and similar integrated circuit technology. Four matched NPN bi-polar transistors provide a circuit that detects changes in temperature by monitoring the current throughput in operation. Environmental temperatures increase current approximately one order of magnitude for each 25 degrees centigrade of changing temperature. With a current gain of 100 for each transistor employed, the current increases from 0.1 microamp at 0 degrees centigrade to 11 microamps at 50 degrees centigrade.