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:
Jul. 07, 2020
Filed:
Nov. 21, 2017
The Boeing Company, Chicago, IL (US);
Alfio Zanchi, Huntington Beach, CA (US);
THE BOEING COMPANY, Chicago, IL (US);
Abstract
A stress sensor is provided, including a substrate and a bridge circuit disposed thereon. The bridge circuit is coupled between an output node and a ground node. The bridge circuit includes a first branch and a second branch, the first having a first resistor, R, having a first orientation and coupled to a tuning resistor, Rtune, at a first intermediate node. The second branch includes a second resistor, R, having a second orientation that is different from the first orientation, and coupled to a variable resistor, Rvar, at a second intermediate node. The bridge circuit includes an amplifier having a positive input terminal coupled to the second intermediate node, and a negative input terminal coupled to the first intermediate node. The amplifier generates a voltage output at the output node as a function of mechanical stress applied to the substrate. Rvar is non-linearly tunable based on the voltage output.