IEEE Trans Biomed Circuits Syst. 2010 Jun;4(3):162-70. doi: 10.1109/TBCAS.2010.2040277.
Charge balancing is a major concern in functional electrical stimulation, since any excess charge accumulation over time leads to electrolysis with electrode dissolution and tissue destruction. This paper presents a new active approach for charge balancing using long-term offset regulation. Therefore, the electrode voltage is briefly monitored after each stimulation cycle and checked if it remains within a predefined voltage range. If not, an offset current is adjusted in order to track the biphasic current mismatch in upcoming stimulations. This technique is compared to a previously introduced active charge balancer as well as commonly used passive balancing techniques. Subsequently, the techniques are verified through experiments on a platinum black electrode in 0.9% saline solution.
电荷平衡是功能电刺激中的一个主要关注点，因为随着时间的推移，任何过量的电荷积累都会导致电解，从而导致电极溶解和组织破坏。本文提出了一种新的主动电荷平衡方法，即使用长期偏移调节。因此，在每个刺激周期后，电极电压会被短暂监测，并检查其是否仍在预设的电压范围内。如果不在，则会调整偏移电流，以便在即将到来的刺激中跟踪双相电流失配。该技术与之前介绍的主动电荷平衡器以及常用的被动平衡技术进行了比较。随后，在 0.9%生理盐水溶液中的铂黑电极上进行实验验证了这些技术。
