Compensated pressure transducer employing digital processing techniques
US4192005A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1977 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Nov 21, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/065
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A semiconductor sensor configuration employs piezoresistors arranged in a bridge configuration. A memory has stored therein at predetermined locations, values indicative of error voltages associated with the particular bridge circuit due to undesireable variations of temperature and pressure. The bridge circuit is coupled to digital processing circuitry which serves to access the memory at desired locations to retreive the values stored and to process these values in order to compensate the output signal supplied by the bridge during operation to provide a compensated output signal truly determinative of the applied pressure as being compensated for the particular error signals as stored in the memory. It is also understood that the above described technique has applicability in compensating other sensor configurations which employ non-semiconductor strain gages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.