Implantable nerve stimulation system

Abstract

The invention relates to an implantable nerve stimulation system which comprises a pulse generator, a central controller, a DCDC power supply, a hybrid high-precision DAC (digital-to-analogue converter), a current output feedback, a DCDC multi-path output DAC, a DCDC multi-path option switch, an energy-storage capacitor selecting multi-path switch, an energy-storage capacitor array, a high-voltage selection circuit and a channel selection switch array, wherein the DCDC power supply is electrically connected with the energy-storage capacitor array; the energy-storage capacitor array is electrically connected with the channel selection switch array; the hybrid high-precision DAC is used for receiving digital input of the central controller, outputting corresponding current and feeding back and reporting the current output condition to the central controller through the current output feedback; the DCDC multi-path output DAC is electrically connected with the current output feedback, and is electrically connected with the DCDC power supply through the DCDC multi-path option switch; and the DCDC multi-path output DAC is used for setting the output voltage of the DCDC power supply.

Description

Technical field [0001] The invention belongs to the field of micro-medical devices, and particularly relates to an implantable nerve stimulation system for medical use and its working method. Background technique [0002] There are many types of implantable nerve stimulation systems, such as implantable deep brain stimulator, implantable spinal cord stimulator, implantable vagus nerve stimulator, etc. Pulses are generated by the stimulation output module of the implantable nerve stimulation system, and high-frequency electrical stimulation is released through implanted electrodes to stimulate the nerves in specific parts of the body, thereby achieving the treatment of specific diseases. [0003] Because the implantable nerve stimulation system is used, its stimulation electrodes are directly implanted inside the human tissue. Therefore, this type of equipment is directly related to the safety of the implanter, and it is necessary to achieve a strict charge balance on the human ner...

AI Technical Summary

Problems solved by technology

However, the way of passive charge balance makes there are many off-chip components in the system, the passive charge balance time is longer, and the waveform amplitude of the passive charge balance process is uncontrollable, and the control is not flexible enough.

However, the constant current implantable neurostimulation system with active charge balance function has problems such as low energy efficiency and insufficient charge balance safety caused by insufficient constant current output accuracy in its power usage scheme.

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