Title：Neural stimulator circuit based on mixed mode fast charge balance

Country：China

Patent No.：201910609405.8

Legal Status：Authorized

Inventor：Hanjun Jiang, Mengying Chen, Zhihua Wang, Chun Zhang

Assignee：Tsinghua University

Address：Tsinghua University,Haidian District Beijing 100084, China

Filing Date：2019-07-08

Issue Date：2020-07-28

The invention discloses a nerve stimulator circuit based on rapid charge balance in a mixed mode. The nerve stimulator circuit comprises a main stimulation part, an electrode short-connecting part anda short current pulse part, the main stimulation part comprises a current source and n pairs of output switches, and each pair of output switches corresponds to an electrode; the electrode short-connecting part comprises n short-connecting switches; and the short current pulse part comprises a window comparator, a control unit, a compensating current unit and n pairs of selective switches, each pair of selective switches corresponds to an electrode, the voltage difference on the electrodes is monitored and compared with safety voltage VW, the output end of the window comparator is connected with the control unit, if the voltage difference exceeds the safety voltage VW, a short current pulse compensating difference value is interpolated, and monitoring and comparing are continued till thevoltage on the electrodes is less than the safety voltage VW. The nerve stimulator circuit can still realize charge balance in a short time, and the situation that charge is accumulated on the electrodes, consequently, the electrodes are electrolyzed, and nervous tissue is damaged is avoided under the situation of one-way large current stimulation or asymmetric two-way large current stimulation.

Patent Certificate： PDF/Jpg