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. 01, 2025
Filed:
Nov. 15, 2021
The Boeing Company, Chicago, IL (US);
Alfio Zanchi, Huntington Beach, CA (US);
The Boeing Company, Arlington, VA (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 and second branch, the first branch having a first resistor coupled to a tunable resistor at a first intermediate node. The second branch has a second resistor coupled to a variable reference resistor of value Rref at a second intermediate node, wherein the variable reference resistor is configured to sweep through a plurality of discrete values Rref. The bridge circuit also includes an amplifier having a positive input terminal coupled to the first intermediate node and a negative input terminal coupled to the second intermediate node. The amplifier is configured to generate a digital voltage output at the output node as a function of the mechanical stress applied to the substrate and of the value Rref.