Electronic sensing circuit using piezoresistors
US5398194A · kind A · utility
17Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1991 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Nov 22, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L9/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic sensing circuit, which can be used in place of a linear variable differential transformer (LVDT) has four piezoresistor elements in a Wheatstone bridge configuration. A source voltage is applied across a first pair of bridge points, and the resulting junction voltages appearing at a second pair of bridge points are applied to a pair of inverting amplifiers in balanced configuration which provide first and second output voltages which change relative to each other depending upon the direction and amount of pressure applied to the piezoresistor elements in a manner similar to the output voltages provided by an LVDT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.