A high voltage, constant current stimulator for electrocutaneous stimulation through small electrodes
| Autor: | C.L. Van Doren, Christopher Poletto |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Materials science
Surface Properties Biomedical Engineering Topology (electrical circuits) Models Biological law.invention Fingers Electric Power Supplies law Skin Physiological Phenomena Electric Impedance Humans Electrodes Electrical impedance Equipment Safety business.industry Electric Conductivity Electrical engineering Signal Processing Computer-Assisted Equipment Design Current source Power (physics) Touch Rise time Calibration Transcutaneous Electric Nerve Stimulation Operational amplifier Constant current business Voltage |
| Zdroj: | IEEE Transactions on Biomedical Engineering. 46:929-936 |
| ISSN: | 1558-2531 0018-9294 |
| DOI: | 10.1109/10.775402 |
| Popis: | A high-voltage stimulator has been designed to allow transcutaneous stimulation of tactile fibers of the fingertip. The stimulator's output stage was based upon an improved Howland current pump topology, modified to allow high load impedances and small currents, The compliance voltage of approximately 800 V is achieved using commercially available high-voltage operational amplifiers. The output current accuracy is better than /spl plusmn/5% over the range of 1 to 25 mA for 30 /spl mu/s or longer pulses. The rise time for square pulses is less than 1 /spl mu/s. High-voltage, common-mode, latch-up power supply problems and solutions are discussed. The stimulator's input stage is optically coupled to the controlling computer and complies with applicable safety standards for use in a hospital environment. The design presented here is for monophasic stimulation only, but could be modified for biphasic stimulation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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