An implantable neurostimulation system

Abstract

The present invention relates to an implantable nerve stimulation system, which includes: a pulse generator; wherein, the pulse generator includes: a central controller, a DCDC power supply, a hybrid high-precision DAC, a current output feedback, a DCDC multi-output DAC, a DCDC multiple selection switch, an energy storage capacitor selection multiple switch, an energy storage capacitor array, a high voltage selection circuit, a channel selection switch array; the DCDC power supply and the energy storage capacitor The array is electrically connected; the energy storage capacitor array is electrically connected to the channel selection switch array; the hybrid high-precision DAC is used to receive the digital input of the central controller and output the corresponding current magnitude, and convert the current The output situation is notified to the central controller in real time through the current output feedback; the DCDC multi-channel output DAC is electrically connected to the current output feedback, and is electrically connected to the DCDC power supply through the DCDC multi-channel selection switch. The output DAC is used to set the output voltage of the DCDC power supply.

Description

technical field [0001] The invention belongs to the field of micro medical devices, in particular to an implanted nerve stimulation system for medical use and its working method. Background technique [0002] There are many types of implanted neurostimulation systems, such as implanted deep brain stimulators, implanted spinal cord stimulators, implanted vagus nerve stimulators, 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 nerves in specific parts of the body, thereby achieving therapeutic effects on specific diseases. [0003] When the implantable neurostimulation system is used, its stimulating electrodes are directly implanted inside the human tissue. Therefore, this type of device is directly related to the safety of the implanter, and it is necessary to achieve strict charge balance on the human nervous tissue that it...

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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