| Title |
A Compact and Cost-effective Neural Stimulator with Improved Dynamics Load Variation |
| Authors |
박건욱(Gun-Wook Park) ; 최정호(Jung-Ho Choi) ; 박성윤(Sung-Yun Park) |
| DOI |
https://doi.org/10.5573/ieie.2025.62.5.57 |
| Keywords |
Cost-efficient; Active charge balancing; Neural stimulator; FES; Biomedical |
| Abstract |
Electrical stimulators that inject electric charges into neurons to induce action potentials and elicit physiological responses have recently attracted attention as devices to treat neurological and muscle-related diseases instead of drug treatment. The main consideration of electrical stimulators is how to more accurately remove residual electric charges. In this paper, we propose a novel electrical stimulation system that combines a single-DAC-based biphasic control signal generation method with an active charge balancing circuit, aiming to overcome the limitations of conventional stimulation designs. Our approach addresses issues such as residual charge accumulation and oscillations due to varying load impedance, while simultaneously reducing circuit complexity and cost. PSPICE simulation and PCB implementation demonstrate that the proposed system maintains a high phase margin of 45.86° and precise current stimulation across diverse impedance conditions, and effectively eliminates residual charge after stimulation. Also, compared to their legacy system, cost savings of approximately 50% was confirmed. |