Input stage for temperature measurement system
US9322719B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | May 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/2503
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature-measurement input stage may include a resistor, a thermistor, a first multiplexor, an amplifier, a second multiplexor, and an output stage. The first multiplexor may be configured to couple the resistor to a first amplifier input during a first multiplexor state, and couple the thermistor to the first amplifier input during a second multiplexor state. The amplifier may comprise the first amplifier input, a second amplifier input coupled to a voltage reference, and an amplifier output coupled to a feedback path. The second multiplexor may be configured to route a feedback current to the resistor during the first multiplexor state and route the feedback current to the thermistor during the second multiplexor state. The output stage may be configured to provide an output current based on the feedback current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.