Patent · US Active

PH sensor

US11567026B2 · kind B2 · utility

0Cited by

0References

17Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Scott R. Summerfelt · Dallas, US
Ernst Muellner · Munich, DE
Sebastian Meier · Munich, DE
Markus Hefele · Munich, DE

Key dates

Filing date	Nov 25, 2020
Grant date	Jan 31, 2023
Priority date	—
Expiry date	Nov 25, 2040

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4167
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

For sensing pH of a fluid, a heating apparatus of a semiconductor die controls a temperature of the fluid to a first temperature. A first voltage of a gate of a floating gate transistor of the semiconductor die is measured while the temperature of the fluid is at the first temperature. Also, the heating apparatus controls the temperature of the fluid to a second temperature that is different than the first temperature. A second voltage of the gate is measured while the temperature of the fluid is at the second temperature. The pH of the fluid is determined based on the first and second voltages, the first temperature and the second temperature.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.