Heater drive circuit and drive method for a gas sensor
US6916415B2 · kind B2 · utility
5Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 2002 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Jul 22, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N27/4067
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and device for driving a gas sensor includes a three-point circuit determining a temperature of a gas sensor having a resistive heating element by determining a measuring current with a measuring resistor flowing through the resistor in a measuring phase. The three-point measurement makes it possible to determine accurately the line resistance of an incoming line branch, which can also be used approximately for the line resistance of another incoming line branch. Naturally, the tap may also be provided on the incoming line side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.