Current pulse circuit embedded with nerve stimulator

Abstract

The invention discloses a current pulse circuit embedded with a nerve stimulator. The current pulse circuit comprises a microprocessor, a first inductor, a first diode, a second resistor, a fifth resistor, a filter capacitor, a boost-buck DC-DC (direct-current-direct-current) chip, a first circuit output terminal and a second circuit output terminal, wherein the first circuit output terminal is grounded through the second resistor and the fifth resistor; the boost-buck DC-DC chip comprises an error amplifier, a PWM (pulse-width modulation) comparator, a switching tube, an SR trigger and an oscillator; the common terminal of the second resistor and the fifth resistor is connected into the first inverting input terminal of the error amplifier; the non-inverting input and output terminals of the error amplifier are respectively connected with reference voltage and the inverting input terminal of the PWM comparator; the oscillation output of the oscillator is connected with the non-inverting input terminal of the PWM comparator; the oscillator outputs a switching signal to the terminal S of the SR trigger; the output terminal of the PWM comparator is connected with the terminal R of the SR trigger; and the output terminal Q of the SR trigger is connected with the control terminal of the switching tube.

Description

technical field [0001] The invention relates to the field of implanted nerve stimulators, in particular to a current pulse circuit of the implanted nerve stimulator. Background technique [0002] Implantable neurostimulation is a method that stimulates target nerves with a certain degree of current pulses to adjust or restore brain, nerve or muscle functions and relieve symptoms. At present, most neurostimulators use non-inductive DCDC circuits to convert the battery voltage and then output stimulation pulse signals. However, when the gastric electric stimulator requires high-dose stimulation, the current pulse stimulation generating circuit with a general structure will encounter some problems, which are difficult to overcome. These problems are as follows: due to the position of surgically implanted electrodes and the differences in human body constitution, there will be differences in the equivalent impedance between the output electrodes of the neurostimulator after sur...

AI Technical Summary

Problems solved by technology

However, when the gastric electric stimulator requires high-dose stimulation, the general structure of the current pulse stimulation circuit will encounter some problems, which are difficult to overcome.

These problems are as follows: Due to the differences in the position of the surgically implanted electrodes and the differences in human body constitution, the equivalent impedance between the output electrodes of the neurostimulator will be different after surgery. Impedance adjustment, work in the best state, the conversion efficiency of the circuit will often be reduced, and the output current waveform will be distorted

This directly affects the service life and therapeutic effect of the battery

Images