ArticleBiomedical engineering letters2022
MCU-less biphasic electrical stimulation circuit for miniaturized neuromodulator.
Article in Biomedical engineering letters, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A standalone neuro-stimulator circuit without a need of microcontroller (MCU) is presented. The neuro-stimulator circuit has a capability to produce a biphasic electrical stimulus with programmable pulse width and train duration. The proposed hardware system consists of commercial-off-the-shelf (COTS) components: a comparator to recognize triggering events and generate on/off signal for a variable train duration, a programmable timer to generate oscillatory signal with a fixed frequency and a variable pulse width, and a differentiator to convert monophasic pulses to biphasic pulses. The differentiator also works as a current driver having current drive capability of up to 40 mA. The proposed MCU-less biphasic electrical neuro-stimulator successfully generated biphasic stimuli with variable pulse widths from 400 µs to 5 ms and train durations from 35 to 55% of cycle duration. It works with fixed parameters programmed at the beginning, and does not need continuous MCU input. Therefore, the proposed standalone neuro-stimulator circuit has a potential to decrease power and area consumption and minimize the size of the neuro-stimulator system.
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