Current pulse circuit embedded with nerve stimulator

A current pulse, nerve stimulation technology, applied in artificial respiration, physical therapy and other directions, can solve the problems of affecting battery life and treatment effect, reducing circuit conversion efficiency, output current waveform distortion, etc., to achieve convenient control, improve battery life, The effect of stable current output

Active Publication Date: 2012-10-17
CHANGZHOU RUISHENAN MEDICAL DEVICES
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  • Abstract
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  • Claims
  • Application Information

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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 constit

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  • Current pulse circuit embedded with nerve stimulator
  • Current pulse circuit embedded with nerve stimulator

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Example Embodiment

[0014] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] The current pulse circuit of the implanted neurostimulator of the present invention includes a DC-DC constant voltage conversion circuit, a linear constant current source circuit, an impedance detection circuit, and a control circuit. The DC-DC constant voltage conversion circuit converts the power supply of the battery to what is needed For a certain output voltage, the output voltage is added to the output electrode to form a load current. The linear constant current source circuit controls the load current, so that the current on the output electrode is controlled at a certain stable current value, and the impedance detection circuit The voltage and current at both ends of the output electrode are collected and transmitted to the control circuit. After the control circuit calculates the corresponding equivalent impedance, it ...

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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...

Claims

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Application Information

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IPC IPC(8): A61N1/36H02M9/02
Inventor 麦宋平赵益新李小虎张春王志华
Owner CHANGZHOU RUISHENAN MEDICAL DEVICES
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