Temperature control system
US4471648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1982 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Jun 8, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/2401
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature control system is disclosed wherein a heater of a gas sensor and a plurality of reference resistors cooperate to form a bridge circuit. The temperature control system comprises a comparator means for monitoring a balancing voltage of the bridge circuit and generating a control signal indicative of the balancing voltage and an electric power amplifier means responsive to the control signal for varying a voltage applied to the bridge circuit in such a manner to reduce the balancing voltage. The gas sensor has mounted therein at least one of the plurality of reference resistors, which reference resistor having a resistance resulting from multiplying the resistance of the heater with a constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.