Li, J;
Wu, Y;
Jiang, D;
Bayford, R;
Demosthenous, A;
(2024)
A Current DAC Based Current Generator with Fourth-Order Current-Mode Filter for Electrical Impedance Tomography.
In:
2024 IEEE International Symposium on Circuits and Systems (ISCAS).
IEEE: Singapore, Singapore.
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Abstract
The current generator is one of the most essential parts in electrical impedance tomography (EIT) systems. State-of-art current generators suffer from the trade-off between current efficiency, linearity, output impedance and well-controlled output current level. To address these challenges, a current DAC based current generator with a fourth-order current-mode filter is proposed. The current generator was designed and simulated in a 65 nm CMOS process. By utilizing the proposed current-mode filter and the master and slave current DAC, the current generator achieves a well-controlled output current leveling with 255 tunning steps, 83.9% current efficiency, 0.11% THD at 1 mApp output current and 2 MΩ output impedance at 500 kHz.
| Type: | Proceedings paper |
|---|---|
| Title: | A Current DAC Based Current Generator with Fourth-Order Current-Mode Filter for Electrical Impedance Tomography |
| Event: | 2024 IEEE International Symposium on Circuits and Systems (ISCAS) |
| Dates: | 19 May 2024 - 22 May 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ISCAS58744.2024.10558679 |
| Publisher version: | http://dx.doi.org/10.1109/iscas58744.2024.10558679 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Electrical impedance tomography, Accuracy, Circuits and systems, Linearity, CMOS process, Generators, Main-secondary |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10195847 |
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