Abstract
An AC-based capacitance transducer has been designed for use in electrical capacitance tomography (ECT) systems. It has a high signal-to-noise ratio (SNR) and good stray-immunity, compared with a charge/discharge transducer designed for the same purpose. However, the non-ideal characteristics of amplifiers and CMOS switches limit the performance of the AC-based transducer. This paper analyses the effects of the frequency-dependent gain of the amplifiers and the finite “ON” resistance of CMOS switches. It is shown that the non-ideal characteristics restrict the frequency response of the AC-based transducer by introducing extra poles, which depend not only on the parameters of the devices but also on the stray capacitance. Mathematical expressions quantifying these effects are presented.
| Original language | English |
|---|---|
| Title of host publication | 2nd World Congress on Industrial Process Tomography |
| Publisher | International Society for Industrial Process Tomography |
| Pages | 595-602 |
| Number of pages | 8 |
| ISBN (Print) | 9780853163183 |
| Publication status | Published - 2013 |
| Event | 2nd World Congress on Industrial Process Tomography - Hannover, Germany Duration: 29 Aug 2001 → 31 Aug 2001 |
Conference
| Conference | 2nd World Congress on Industrial Process Tomography |
|---|---|
| Country/Territory | Germany |
| City | Hannover |
| Period | 29/08/01 → 31/08/01 |
Research Beacons, Institutes and Platforms
- Manchester Institute for Collaborative Research on Ageing