Invention Grant
- Patent Title: Resistive bridge sensor with temperature compensation
-
Application No.: US16877746Application Date: 2020-05-19
-
Publication No.: US11422044B2Publication Date: 2022-08-23
- Inventor: Marco Zamprogno , Andrea Barbieri , Pasquale Flora , Raffaele Enrico Furceri
- Applicant: STMicroelectronics S.r.l.
- Applicant Address: IT Agrate Brianza
- Assignee: STMicroelectronics S.r.l.
- Current Assignee: STMicroelectronics S.r.l.
- Current Assignee Address: IT Agrate Brianza
- Agency: Crowe & Dunlevy
- Main IPC: G01L1/22
- IPC: G01L1/22 ; G01B7/16 ; G01D5/16

Abstract:
A bridge driver circuit applies a bias voltage across first and second input nodes of a resistive bridge circuit configured to measure a physical property such as pressure or movement. A sensing circuit senses drive current, bias current and common mode current for the bridge driver and sums the sensed currents to generate a source current. The source current is processed to determine a normalized resistance and temperature of the resistive bridge circuit and from which a temperature dependent sensitivity of the resistive bridge circuit is determined. A voltage output at first and second output nodes of the resistive bridge circuit is processed to determine a value of the physical property. This processing further involves applying a temperature correction in response to the determined temperature dependent sensitivity.
Public/Granted literature
- US20210364375A1 RESISTIVE BRIDGE SENSOR WITH TEMPERATURE COMPENSATION Public/Granted day:2021-11-25
Information query