Amplification interface, and corresponding measurement system and method for calibrating an amplification interface
US11652458B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2021 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Sep 17, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45514
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A thermally-isolated-metal-oxide-semiconducting (TMOS) sensor has inputs coupled to first and second nodes to receive first and second bias currents, and an output coupled to a third node. A tail has a first conduction terminal coupled to the third node and a second conduction terminal coupled to a reference voltage. A control circuit applies a control signal to a control terminal of the tail transistor based upon voltages at the first and second nodes so that a common mode voltage at the first and second nodes is equal to a reference common mode voltage. A differential current integrator has a first input terminal coupled to the second node and a second input terminal coupled to the first node, and provides an output voltage indicative of an integral of a difference between a first output current at the first input terminal and a second output current at the second input terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.