| dc.contributor.author |
Rao, V. Ramgopal |
|
| dc.date.accessioned |
2023-10-27T06:46:52Z |
|
| dc.date.available |
2023-10-27T06:46:52Z |
|
| dc.date.issued |
2012-03 |
|
| dc.identifier.uri |
https://ieeexplore.ieee.org/document/6086761 |
|
| dc.identifier.uri |
http://dspace.bits-pilani.ac.in:8080/xmlui/handle/123456789/12663 |
|
| dc.description.abstract |
This paper presents a new highly sensitive (10 μV/ppm) bidirectional current excitation method for piezo-resistive sensor measurements, through excitation of two half bridges for Δ R measurement. The proposed circuit is insensitive to thermoelectric and stray noise effects since it measures the peak-to-peak value of the generated voltage. Measurement results using resistors show that variations as low as 0.3 ppm are measurable from 15°C to 80°C with resistors. As an experimental application, 40 parts per billion variation in gas concentration using piezo-resistive SU-8 microcantilevers is measured by the proposed circuit at room temperature. |
en_US |
| dc.language.iso |
en |
en_US |
| dc.publisher |
IEEE |
en_US |
| dc.subject |
EEE |
en_US |
| dc.subject |
Bidirectional current source |
en_US |
| dc.subject |
Cantilevers |
en_US |
| dc.subject |
Current excitation |
en_US |
| dc.subject |
Piezo resistivity |
en_US |
| dc.subject |
Wheatstone's bridge |
en_US |
| dc.title |
Current Excitation Method for ΔR Measurement in Piezo-Resistive Sensors With a 0.3-ppm Resolution |
en_US |
| dc.type |
Article |
en_US |