CN107773842A - A kind of floating earth-current stimulation circuit - Google Patents
A kind of floating earth-current stimulation circuit Download PDFInfo
- Publication number
- CN107773842A CN107773842A CN201610720794.8A CN201610720794A CN107773842A CN 107773842 A CN107773842 A CN 107773842A CN 201610720794 A CN201610720794 A CN 201610720794A CN 107773842 A CN107773842 A CN 107773842A
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- current
- circuit
- voltage
- floating earth
- amplifier
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/36014—External stimulators, e.g. with patch electrodes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/02—Details
- A61N1/025—Digital circuitry features of electrotherapy devices, e.g. memory, clocks, processors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Biophysics (AREA)
- Heart & Thoracic Surgery (AREA)
- Electrotherapy Devices (AREA)
Abstract
The present invention relates to medical treatment electronic equipment field, more particularly to a kind of floating earth-current stimulation circuit.Including：Generation circuit is encouraged, for producing two-way reverse voltage signal；Voltage-current converter circuit, for the two-way reverse voltage signal to be respectively converted into constant current corresponding to two-way, and exported respectively by the first output port, the second output port.Floating earth-current stimulation circuit provided by the invention, disturbed by avoiding bringing into reference edge, caused current stimulation signal adjustable extent is wide, and load capacity is strong, and waveform symmetry is good, avoid because bring net charge into and caused by electrolysis and tissue damage.
Description
Technical field
The present invention relates to medical treatment electronic equipment field, more particularly to a kind of floating earth-current stimulation circuit.
Background technology
In medical treatment field, it is widely used for the electronic stimulation of injected organism tissue, in order to not bring net electricity into human body
Lotus, electro photoluminescence typically use bi-phase wave, but because bi-phase wave caused by stimulator may not be full symmetric, so always difficult
Exempt from that a small amount of net charge can be brought into.If acting on tissue more than a certain degree of asymmetric double phase wave, electricity may result in
Solution and tissue damage, meanwhile, in the prior art, always one end is grounded for the load of stimulation circuit（Reference edge）, load the other end
Stimulation circuit output is connected, so builds an electric energy loop, but reference edge is tended to by local or external interference, such as：
The high frequency high current of local circuit, power network interference, external radiation etc., drift phenomenon occurs in such reference edge, so as to cause to pierce
The baseline movement of shock wave shape, the symmetry of bi-phase wave can be broken.
The content of the invention
It is an object of the invention to overcome in the prior art electro photoluminescence process easily entrain a small amount of electrostatic charge, so as to human body
The problem of damaging, there is provided a kind of floating earth-current stimulation circuit, the circuit avoid bringing reference edge interference, caused electric current thorn into
Energizing signal adjustable extent is wide, and load capacity is strong, and waveform symmetry is good, avoid because bring net charge into and caused by be electrolysed and organize damage
Wound.In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of floating earth-current stimulation circuit, including：
Generation circuit is encouraged, for producing two-way reverse voltage signal；
Voltage-current converter circuit, for the two-way reverse voltage signal to be respectively converted into constant current corresponding to two-way,
And exported respectively by the first output port, the second output port.
Further, the excitation generation circuit is numerical control DAC chip.
Further, the numerical control DAC chip is AD5722；Its port VoutA is used to export first via voltage, port
VoutB is used to export the second road voltage；The first via voltage and the second tunnel voltage inversion.
Further, the voltage-current converter circuit is by identical first change-over circuit of two-way, the second conversion electricity
Road forms, and it is the first electric current that the first change-over circuit, which is used for first via voltage conversion,；Second change-over circuit is used for the second road electricity
Pressure is converted to the second electric current.
Further, the voltage-current converter circuit includes Howland current pumps and transfer resistance；Encourage generation circuit
The inverting input of amplifier in the voltage signal access Howland current pumps of output；The output of the amplifier passes through the conversion
The output port of resistance and voltage-current converter circuit connects.
Further, in the current pump including Howland, the output end of amplifier passes through a high frequency filter and amplifier
Inverting input connects；The high frequency filter is resistance and electric capacity in parallel.
Further, the in-phase input end of amplifier passes through a ground resistance earth in the current pump including Howland.
Further, one end that the transfer resistance is connected with potential circuit change-over circuit output port is also by a resistance
It is connected with the in-phase input end of amplifier.
Compared with prior art, beneficial effects of the present invention：Floating earth-current stimulation circuit provided by the invention, by avoiding
Bring into reference edge interference, caused current stimulation signal adjustable extent is wide, and load capacity is strong, and waveform symmetry is good, avoid because
Bring net charge into and cause electrolysis and tissue damage.
Brief description of the drawings：
Fig. 1 is the theory diagram of the present invention.
Fig. 2 is that generation circuit circuit diagram is encouraged in the specific embodiment of the invention.
Fig. 3 is voltage-current converter circuit circuit diagram in the specific embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is described in further detail.But this should not be interpreted as to this
The scope for inventing above-mentioned theme is only limitted to following embodiment, all to belong to the present invention based on the technology that present invention is realized
Scope.
Embodiment 1：As shown in figure 1, the present embodiment provides a kind of floating earth-current stimulation circuit, it includes：For producing two
The excitation generation circuit 1 of road reverse voltage signal, and the Voltage to current transducer electricity being connected with the excitation generation circuit output end
Road；Two-way reverse voltage signal is respectively first via voltage and the second road voltage, and the voltage-current converter circuit is used for will excitation
It is corresponding constant that the mutual anti-phase voltage signal of two-way of generation circuit output is respectively converted into the two-way related to the voltage signal
Electric current；Specifically, typically excitation generation circuit 1 is exported respectively by using the identical voltage-current converter circuit of two-way
Two-way reverse voltage signal changed, the identical voltage-current converter circuit of the two-way is respectively the first change-over circuit
21 and second change-over circuit 22, it is the first electric current that the first change-over circuit 21, which is used for first via voltage conversion,；Second change-over circuit
22 are used to the second tunnel voltage conversion be the second electric current；Meanwhile first change-over circuit 21 by the first electric current export to first output
Port OUT1, the second change-over circuit 22 is by the second current output terminal mouth OUT2；In the first change-over circuit 21 and the second change-over circuit
In the case that 22 is identical, the first electric current is identical with the size of the second electric current, in the opposite direction；In use, by defeated by first
Exit port OUT1 and the second output port OUT2 act on load（The load such as can be human body by physiotherapy position）Both ends, complete
Stimulation therapy.
In the present invention, it is driven using a pair of inversion signals, load both ends need not be connected to reference edge, so presenting
The state that both-end floats, therefore the circuit drives mode that the present embodiment provides effectively can bring the drift of reference edge in the prior art
Common mode disturbances filter out, so as to ensure the symmetry of output signal.
Embodiment 2：As shown in Figure 2 and Figure 3, in the present embodiment, specifically produced using numerical control DAC chip AD5722 as excitation
Raw circuit 1.Chip AD5722 port VoutA is used to exporting first via voltage signal Sig1+, and port VoutB is used to exporting the
Two road voltage signal Sig1-；The first via voltage signal Sig1+ and the second road voltage signal Sig1+ are anti-phase.
And voltage-current converter circuit equally includes the identical change-over circuit 22 of first change-over circuit 21 and second, such as scheme
Shown in 2, the first change-over circuit 21 and the second change-over circuit 22 include Howland current pumps and transfer resistance；Specifically, first
Change-over circuit 21 includes the first amplifier U1 and the first transfer resistance R3, and first via voltage signal Sig1+ is inputted to the first amplifier U1
Inverting input；First amplifier U1 output passes through transfer resistance R3 and the first output port of voltage-current converter circuit
OUT1 connections.First amplifier U1 output end is also connected by a high frequency filter with the first amplifier U1 inverting input；Institute
High frequency filter is stated as the electric capacity C5 of first resistor 23 and first in parallel；First amplifier U1 in-phase input end passes through the first ground connection
Resistance R2 is grounded；One end that first transfer resistance R3 is connected with the first output port OUT1 is also by second resistance R22 and first
Amplifier U1 in-phase input end connects, and in first change-over circuit 21, electric current I1=first of the first output port OUT1 outputs is electric
Press the transfer resistance R3 of signal Sig1+/first.
Likewise, the second change-over circuit 22 includes the second amplifier U3 and the second transfer resistance R8, the second road voltage signal
Sig1- is inputted to the second amplifier U3 inverting input；Second amplifier U3 output is turned by transfer resistance R3 and voltage x current
Change the second output port OUT2 connections of circuit.Second amplifier U3 output end is again by a high frequency filter and the second amplifier
U3 inverting input connection；The high frequency filter is the electric capacity C11 of 3rd resistor 19 and second in parallel；Second amplifier U3's is same
Phase input is grounded by the second grounding resistance R7；One end that second transfer resistance R8 is connected with the second output port OUT2 is also logical
The in-phase input end that the 4th resistance R27 is crossed with the second amplifier U3 is connected, in second change-over circuit 22, the second output port OUT2
The transfer resistance R8 of the electric current I2 of output=first voltage signal Sig1-/second., can be by adjusting AD5722 output in this implementation
Value realizes that the output current of stimulation circuit changes in 1mA ~ 50mA wide scope.
The floating earth-current stimulation circuit that the present embodiment provides exports one group of anti-phase program-controlled electric using high-precision DAC chip
Signal is pressed, thereby may be ensured that this group of signal differs the precision of 180 ° and output voltage values；Meanwhile two-way Voltage-current conversion circuit
Structure and component parameter, materials are completely the same, and it is non-right can effectively to reduce the output brought by the difference of two-way change-over circuit
Title property；Further, in the present embodiment, because under certain loading range, such as：The Ω of 50 Ω ~ 900, it is ensured that current source is controllable,
I.e. output current is maintained within error because load changes the fluctuation brought, and this needs stronger output load capacity, so pressure
Stream change-over circuit is built using the amplifier of wide power rail, and uses two-way complementary circuit driving load；The present embodiment uses mutual
Mending push-pull type pressure stream change-over circuit further can halve the output requirement of single amplifier, ensure that its load capacity.
To sum up, the floating earth-current stimulation circuit that the present embodiment provides, by avoiding bringing reference edge interference, caused electric current into
Stimulus signal adjustable extent is wide, and load capacity is strong, and waveform symmetry is good, avoid because bring net charge into and caused by be electrolysed and organize
Damage.
Claims (8)
- A kind of 1. floating earth-current stimulation circuit, it is characterised in that including：Generation circuit is encouraged, for producing two-way reverse voltage signal；Voltage-current converter circuit, for the two-way reverse voltage signal to be respectively converted into constant current corresponding to two-way, And exported respectively by the first output port, the second output port.
- 2. floating earth-current stimulation circuit as claimed in claim 1, it is characterised in that the excitation generation circuit is numerical control DAC Chip.
- 3. floating earth-current stimulation circuit as claimed in claim 1, it is characterised in that the numerical control DAC chip is AD5722；Its Port VoutA is used to export first via voltage, and port VoutB is used to export the second road voltage；The first via voltage and second Road voltage inversion.
- 4. floating earth-current stimulation circuit as claimed in claim 3, it is characterised in that the voltage-current converter circuit is by two-way Identical first change-over circuit, the second change-over circuit composition, it is that the first change-over circuit, which is used for first via voltage conversion, One electric current；It is the second electric current that second change-over circuit, which is used for the second tunnel voltage conversion,.
- 5. floating earth-current stimulation circuit as claimed in claim 1, it is characterised in that the voltage-current converter circuit includes Howland current pumps and transfer resistance；Amplifier is anti-in the voltage signal access Howland current pumps of excitation generation circuit output Phase input；The output of the amplifier is connected by the output port of the transfer resistance and voltage-current converter circuit.
- 6. floating earth-current stimulation circuit as claimed in claim 5, it is characterised in that in the current pump including Howland, fortune The output end put is connected by a high frequency filter and the inverting input of amplifier；The high frequency filter for resistance in parallel and Electric capacity.
- 7. floating earth-current stimulation circuit as claimed in claim 5, it is characterised in that transported in the current pump including Howland The in-phase input end put passes through a ground resistance earth.
- 8. floating earth-current stimulation circuit as claimed in claim 5, it is characterised in that the transfer resistance and Voltage to current transducer One end of circuit output port connection is also connected by a resistance and the in-phase input end of amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720794.8A CN107773842B (en) | 2016-08-24 | 2016-08-24 | Floating ground current stimulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610720794.8A CN107773842B (en) | 2016-08-24 | 2016-08-24 | Floating ground current stimulation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107773842A true CN107773842A (en) | 2018-03-09 |
| CN107773842B CN107773842B (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610720794.8A Active CN107773842B (en) | 2016-08-24 | 2016-08-24 | Floating ground current stimulation circuit |
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Citations (11)
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| CN1215614A (en) * | 1998-12-04 | 1999-05-05 | 清华大学 | Functional neuromyo-electric signal identification and stimulation apparatus |
| US20070142874A1 (en) * | 2005-01-21 | 2007-06-21 | John Michael S | Multiple-symptom medical treatment with roving-based neurostimulation. |
| CN101347367A (en) * | 2007-07-17 | 2009-01-21 | 美国诺尔康神经电子科技有限公司 | Electronic cochlea utilizing multiple-resolution current sources and flexible data encoding plans |
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| CN102368973A (en) * | 2009-03-12 | 2012-03-07 | 赛诺龙医疗公司 | An RF electrode for aesthetic and bodyshaping devices and method of using same |
| CN202505990U (en) * | 2012-04-11 | 2012-10-31 | 太原恒业科生医疗器械有限公司 | Bipolar constant current source circuit and electrical stimulation therapeutic apparatus utilizing the same |
| CN203379486U (en) * | 2013-06-16 | 2014-01-08 | 复旦大学 | External defibrillator available for multi-shift discharge energy adjustment |
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| CN101347367A (en) * | 2007-07-17 | 2009-01-21 | 美国诺尔康神经电子科技有限公司 | Electronic cochlea utilizing multiple-resolution current sources and flexible data encoding plans |
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| CN103638600A (en) * | 2013-12-25 | 2014-03-19 | 哈尔滨工业大学 | Multi-channel electrical stimulation feedback system of intelligent myoelectrical artificial limb |
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| CN107773842B (en) | 2021-09-21 |
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Address after: No. 5, Wuke East 3rd Road, Wuhou District, Chengdu, Sichuan 610000 Patentee after: Sichuan Jinjiang Electronic Medical Device Technology Co.,Ltd. Address before: No.5, Wuke East 3rd road, Wuhou Science Park, Chengdu hi tech Industrial Development Zone, Sichuan 610045 Patentee before: SICHUAN JINJIANG ELECTRONIC SCIENCE AND TECHNOLOGY Co.,Ltd. |
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