Abstract
In Electrical Impedance Tomography (EIT), we measure boundary voltages due to multiple injection currents using surface electrodes placed on a subject and try to reconstruct cross-sectional resistivity images. This requires a precision phase-sensitive demodulator. In this paper, we present a design and performance analysis of a digital phase-sensitive demodulator including both in-phase and quadrature detectors. The designed demodulator was implemented and tested to verify SNR of 143dB, phase error of 2.25°, and stability of 0.0135%.
| Original language | English |
|---|---|
| Pages (from-to) | 1070-1072 |
| Number of pages | 3 |
| Journal | Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings |
| Volume | 2 |
| Publication status | Published - 2003 |
| Event | A New Beginning for Human Health: Proceddings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society - Cancun, Mexico Duration: 17 Sept 2003 → 21 Sept 2003 |
Keywords
- Digital Phase Sensitive Demodulator
- Electrical Impedance Tomography (EIT)
- Matched Filter
- Nonuniform Sampling