CN105251123B - A kind of discharge protection circuit and external defibrillator for external defibrillator - Google Patents
A kind of discharge protection circuit and external defibrillator for external defibrillator Download PDFInfo
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Abstract
The embodiment of the present invention discloses a kind of discharge protection circuit and external defibrillator for external defibrillator.One end of capacitor is connected with one end of inductance, and the second end that the other end is switched with second switch and the 4th respectively is connected；The first end that the other end of inductance is switched with first switch and third respectively is connected；The second end of first switch is connected with the first end of first electrode sheet and second switch respectively；The first end that the second end of third switch is switched with second electrode sheet and the 4th respectively is connected；First output end of the first isolated drive circuit is connected with the third end of first switch；Second output terminal is connected with the third end of the 4th switch；The third end of second switch is connected with the first output end of the second isolated drive circuit；The third end of third switch is connected with the second output terminal of the second isolated drive circuit；The first output end and second output terminal of nor gate logic circuit export diphase signal respectively.With the application of the invention, the functional reliability of external defibrillator can be improved.
Description
Technical field
The present invention relates to Medical Devices technology more particularly to a kind of discharge protection circuits for external defibrillator and external
Defibrillator.
Background technique
Cardiac sudden death (SCD, Sudden Cardiac Death) is the major causes of death of cardiovascular disease, accounts for angiocarpy
50% or more of disease death sum.The reason of causing SCD is largely a period of time occurred on the basis of all kinds of cardiovascular pathological changes
Sex dysfunction and electrophysiological change, and cause malignant ventricular arrhythmia, for example, Ventricular Tachycardia (VT,
Ventricular Tachycardia, abbreviation ventricular tachycardia) and ventricular fibrillation (VF, Ventricular
Fibrillation, abbreviation ventricular fibrillation) etc..Studies have shown that ventricular fibrillation once occurs, often procrastinate one minute, defibrillation success rate will decline
10%, after ventricular fibrillation occurs 10 minutes, defibrillation success rate is almost nil, thus, it is timely using defibrillator when ventricular fibrillation occurs
Carrying out electric defibrillation to patient is the key that save patient.
Defibrillator includes internal defibrillation device and external defibrillator, due to external defibrillator have it is easy to use, can be
Shi Jinhang defibrillation, is widely used.For example, external defibrillator (AED, Automated External
Defibrillator) after being powered up, by pressing discharge button star t-up discharge circuit, by pulsed discharge shock by electricity human body,
Electrocardiogram can be automatically performed to automatically analyze, based on analysis result automatic identification ventricular fibrillation and ventricular tachycardia, thus implement defibrillation in time, by
Implement in defibrillation early, success rate is higher, and patient's success of cardiopulmonary resuscitation rate can be improved, and is to stop suddenly in heartbeat, ventricular fibrillation occurs
In the case of, by shocking by electricity, cardiac stimulus makes it restore the Portable medical instrument of normal condition.
It wherein, is tens to several hundred microfarads for the capacitance size of the discharge circuit of electric discharge, it is reachable that highest stores energy
600 joules, voltage reach several kilovolts, the time of pulsed discharge only have several milliseconds to a few tens of milliseconds.Thus, in electric discharge, electric discharge electricity
The stability and security reliability on road are particularly important.
Fig. 1 is prior art discharge circuit structural schematic diagram.Referring to Fig. 1, which includes: capacitor (C), the first electricity
Sense (L1), first electrode sheet, second electrode sheet, first switch (SW1), second switch (SW2), third switch (SW3), the 4th open
Close (SW4) and human body resistance (R), wherein
First electrode sheet, second electrode sheet, first switch, second switch, third switch, the 4th switch and human body resistance
A H bridge is formed, first switch and second switch are the arm side together of H bridge, and third switch and the 4th switch are the another of H bridge
With arm side.
One end of capacitor is connected with one end of inductance, the other end of inductance switched respectively with first switch and third the
One end is connected, and the second end that the other end of capacitor is switched with second switch and the 4th respectively is connected, the second end of first switch
Be connected respectively with the first end of first electrode sheet and second switch, third switch second end respectively with second electrode sheet and
The first end of 4th switch is connected, and first electrode sheet, second electrode sheet are connected with human body respectively.
It first switch, second switch, third switch and the 4th switches on-off and is controlled by Ui signal, utilizing
Discharge circuit is shocked by electricity by pulsed discharge during human body, it is desirable that at same time point, the same arm side switch of H bridge cannot be simultaneously
There is straight-through phenomenon to avoid H bridge, causes switch to burn out, to influence the normal use of external defibrillator in conducting.But it is existing
The method for controlling first switch to the 4th switch on and off by Ui signal, since Ui signal is converted from high electric frequency signal to low level
When signal, there is mutually overlapping part, so that the same arm side switch for easily causing H bridge simultaneously turns on, so that external defibrillator
Security reliability it is lower, reduce the service life of external defibrillator.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of discharge protection circuit and external defibrillation for external defibrillator
Device improves the functional reliability of external defibrillator.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that
On the one hand, the embodiment of the present invention provides a kind of discharge protection circuit for external defibrillator, comprising: capacitor, electricity
Sense, first electrode sheet, second electrode sheet, first switch, second switch, third switch, the 4th switch, the first isolation drive electricity
Road, the second isolated drive circuit and nor gate logic circuit, wherein
First electrode sheet, second electrode sheet, first switch, second switch, third switch, the 4th switch one H bridge of composition, the
One switch and second switch are the arm side together of H bridge, and third switch and the 4th switch are another same arm side of H bridge；
One end of capacitor is connected with one end of inductance, the second end phase that the other end is switched with second switch and the 4th respectively
Even；
The first end that the other end of inductance is switched with first switch and third respectively is connected；
The third end of first switch is connected with the first output end of the first isolated drive circuit；
The third end of 4th switch is connected with the second output terminal of the first isolated drive circuit；
The third end of second switch is connected with the first output end of the second isolated drive circuit；
The third end of third switch is connected with the second output terminal of the second isolated drive circuit；
Wherein, the first switch driving signal and second output terminal of the first output end output of the first isolated drive circuit are defeated
The second switch of the 4th switching drive signal state synchronized out, the first output end output of the second isolated drive circuit drives letter
Number with second output terminal output third switch driving status signal it is synchronous；
Nor gate logic circuit exports two-phase for handling the pulse-width signal of input, by the first output end
First in signal outputs signal to the input terminal of the first isolated drive circuit, is exported in diphase signal by second output terminal
Second outputs signal to the input terminal of the second isolated drive circuit.
Preferably, the nor gate logic circuit include: the first nor gate, the second nor gate, third nor gate, the 4th or
NOT gate, the 5th nor gate and the 6th nor gate, wherein
The first input end of first nor gate and the second input terminal reception pwm signal, output end and the second nor gate
First input end is connected；
Second input terminal of the second nor gate receives pre-set brake signal, output end and the first of third nor gate
Input terminal and the second input terminal are connected；
The output end of third nor gate is defeated with the second of the first input end of four nor gate and the 6th nor gate respectively
Enter end to be connected；
Second input terminal of four nor gate receives pre-set direction signal, and output end exports the first driving signal extremely
The input terminal of first isolated drive circuit；
The first input end of 5th nor gate and the second input terminal receive pre-set direction signal, output end and the
The first input end of six nor gates is connected；
The input terminal of output end output the second driving signal to the second isolated drive circuit of 6th nor gate.
Preferably, the brake signal, direction signal and pwm signal are by pre-set microcontroller according to specific
Control strategy output.
Preferably, the first switch to the 4th switch includes: insulated gate bipolar transistor, complementary metal oxide half
Conductor tube, triode or bipolar junction transistor.
Preferably, the metal-oxide-semiconductor includes but is not limited to: P-channel metal-oxide-semiconductor or N-channel MOS pipe.
Preferably, the first end is drain electrode, and second end is source electrode, and third end is grid.
Discharge protection circuit and external defibrillator provided in an embodiment of the present invention for external defibrillator, by be added or
NOT gate logic circuit, in electric discharge, pwm signal passes through with enabled and control direction nor gate logic circuit, exports one group
Diphase signal, the on state of two switches to control H bridge corresponding arm, thereby may be ensured that during discharge, H bridge is same
On side arm, all only one switch is conducting, avoids and burns out switch due to two of H bridge corresponding arm switches simultaneously turn on,
The reliability and stability of discharge protection circuit are improved, and then improve the functional reliability and work effect of external defibrillator
Rate.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is prior art discharge circuit structural schematic diagram；
Fig. 2 is the discharge protection circuit structural schematic diagram that the embodiment of the present invention is used for external defibrillator.
Specific embodiment
The embodiment of the present invention is described in detail with reference to the accompanying drawing.
It will be appreciated that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
Fig. 2 is the discharge protection circuit structural schematic diagram that the embodiment of the present invention is used for external defibrillator.Referring to fig. 2, this is put
Electric protection circuit includes: capacitor 21, inductance 22, human body resistance 23, first switch 24, second switch 25, third switch the 26, the 4th
Switch 27, second electrode sheet 20, first electrode sheet 28, the first isolated drive circuit 38, the second isolated drive circuit 37 and or
NOT gate logic circuit 29, wherein
Human body resistance 23, first switch 24, second switch 25, third switch 26, the 4th switch 27 and first electrode sheet
28, second electrode sheet 20 forms a H bridge, first switch 24 and the 4th switch 27 for H bridge the side of arm together, third switch 26 with
And the 4th switch 27 be H bridge another same arm side；
One end of capacitor 21 is connected with one end of inductance 22, the other end respectively with second switch 25 and the 4th switch 27
Second end is connected；
The other end of inductance 22 is connected with the first end of first switch 24 and third switch 26 respectively；
The second end of first switch 24 is connected with the first end of first electrode sheet 28 and second switch 25 respectively；
The second end of third switch 26 is connected with the first end of one end of second electrode sheet 20 and the 4th switch 27 respectively；
Human body 23 is connected with first electrode sheet 28, second electrode sheet 20 respectively；
The third end of first switch 24 is connected with the first output end of the first isolated drive circuit 38；
The third end of 4th switch 27 is connected with the second output terminal of the first isolated drive circuit 38；
The third end of second switch 25 is connected with the first output end of the second isolated drive circuit 37；
The third end of third switch 26 is connected with the second output terminal of the second isolated drive circuit 37；
Wherein, the first switch driving signal and second output terminal of the first output end output of the first isolated drive circuit 38
4th switching drive signal state synchronized of output, amplitude is different, the first output end output of the second isolated drive circuit 37
Second switch driving signal is synchronous with the driving status signal of third switch that second output terminal exports, and amplitude is different；
First isolated drive circuit 38 is used to carry out transformation isolation to the first driving signal of input, and isolation does well same
Step, the different first switch driving signal of amplitude and the 4th switching drive signal, the second isolated drive circuit 37 are used for defeated
The second driving signal for entering carries out transformation isolation, isolates state synchronized, the different second switch driving signal of amplitude and the
Three switching drive signals；Wherein, first switch driving signal is exported to the third end of first switch 24, the 4th switching drive signal
Output is to the third end of the 4th switch 27, and second switch driving signal is exported to the third end of second switch 25, and third switch drives
Dynamic signal is exported to the third end of third switch 26；
Nor gate logic circuit 29 is used for pulsewidth modulation (PWM, Pulse Width Modulation) signal to input
It is handled, the input of the first isolated drive circuit 38 is outputed signal to by first in the first output end output diphase signal
End outputs signal to the input terminal of the second isolated drive circuit 37 by second in second output terminal output diphase signal.
In the embodiment of the present invention, preferably, first switch to the 4th switch includes but is not limited to: insulated gate bipolar crystal
Manage (IGBT, Insulated Gate Bipolar Transistor), complementary metal oxide semiconductor pipe (MOS, Metal
Oxide Semiconductor), triode or bipolar junction transistor (BJT, Bipolar Junction Transistor) etc..
Wherein, metal-oxide-semiconductor includes but is not limited to: P-channel metal-oxide-semiconductor, N-channel MOS pipe etc..
By taking switch (first switch to the 4th switch) is insulated gate bipolar transistor as an example, in the embodiment of the present invention, the
One end is drain electrode, and second end is source electrode, and third end is grid.Certainly, in practical application, being also possible to first end is source electrode, the
Two ends are drain electrode, and third end is grid.In this way, if the voltage of insulated gate bipolar transistor grid is greater than the voltage of source electrode,
Insulated gate bipolar transistor is in the conductive state, if the voltage of insulated gate bipolar transistor grid is less than the electricity of drain electrode
Pressure, insulated gate bipolar transistor are in an off state.
In the embodiment of the present invention, as an alternative embodiment, nor gate logic circuit includes: the first nor gate 31, second
Nor gate 32, third nor gate 33, four nor gate 34, the 5th nor gate 35 and the 6th nor gate 36, wherein
The first input end of first nor gate 31 and the second input terminal receive pwm signal, output end and the second nor gate
32 first input end is connected；
Second input terminal of the second nor gate 32 receives pre-set brake signal, output end and third nor gate 33
First input end and the second input terminal are connected；
The output end of third nor gate 33 respectively with the first input end of four nor gate 34 and the 6th nor gate 36
Second input terminal is connected；
Second input terminal of four nor gate 34 receives pre-set direction signal, and output end exports the first driving signal
To the input terminal of the first isolated drive circuit 38；
The first input end of 5th nor gate 35 and the second input terminal receive pre-set direction signal, output end with
The first input end of 6th nor gate 36 is connected；
The input terminal of output end output the second driving signal to the second isolated drive circuit 37 of 6th nor gate 36.
In the embodiment of the present invention, nor gate is the gate circuit with multiterminal input and Single-end output.It is defeated when any multiterminal
Enter end be high level (logical one) when, output be exactly low level (logical zero)；Only when all input terminals are all that low level (is patrolled
Collect " 0 ") when, output is only high level (logical one).
Preferably, pwm signal can be generated and be exported by microcontroller, microcontroller is generated and output duty cycle is fixed or become
Change adjustable pwm signal.Brake signal isSignal, direction signal are DIR signal, and the first driving signal is AHEAD letter
Number, the second driving signal is CONTRARY signal.
In the embodiment of the present invention, three signals: pwm signal, brake signal and direction are needed when discharging human body
Signal.As an alternative embodiment, brake signal, direction signal and pwm signal can also be by microcontrollers according to specific
Control strategy output, details are not described herein.
Table 1 is the truth table of each signal in discharge protection circuit.
Table 1
| Pwm signal | Brake signal | Direction signal | First driving signal | Second driving signal |
| 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 1 | 0 | 0 |
| 0 | 1 | 0 | 0 | 0 |
| 0 | 1 | 1 | 0 | 0 |
| 1 | 0 | 0 | 1 | 0 |
| 1 | 0 | 1 | 0 | 1 |
| 1 | 1 | 0 | 0 | 0 |
| 1 | 1 | 1 | 0 | 0 |
In table 1, high level signal is logical one, and low level signal is logical zero.Seen from table 1, the first driving signal
With the second driving signal be not in simultaneously be high level state, that is, H bridge corresponding arm two IGBT switch will not
It simultaneously turns on.This driving method can prevent two IGBT Switch Cut-throughs of corresponding arm on H bridge, and IGBT switch short is caused to burn
It is bad, play the role of adequately protecting to discharge protection circuit, improves the stability and reliability of circuit.
In the embodiment of the present invention, about capacitor, the parameter value of inductance, it can be determined according to actual needs, belong to known skill
Art, detailed description is omitted here.
About the setting of brake signal and direction signal, the working principle of nor gate and discharge protection circuit belongs to public affairs
Know technology, detailed description is omitted here.
In the embodiment of the present invention, when discharge protection circuit is discharged, guarantee two IGBT for being located at corresponding arm on H bridge
Switch (for example, first switch and the 4th switch, alternatively, second switch and third switch) will not simultaneously turn on extremely important.?
When external defibrillator works normally, capacitor 21, inductance 22, first switch 24, human body 23, second electrode sheet 20, first electrode sheet
28 and the 4th switch 27 formed the first performance loop, alternatively, capacitor 21, inductance 22, third switch 26, first electrode sheet 28,
Second electrode sheet 20, human body 23 and second switch 25 form the second performance loop, and the total impedance of discharge protection circuit is electric discharge
Protect the impedance and the human body impedance (resistance that first electrode sheet 28, second electrode sheet 20 and human body are connected to form of each component of circuit
The sum of anti-R), and the impedance of each component is much smaller than human body impedance.If two IGBT switch of H bridge corresponding arm simultaneously turns on
When, since the impedance of each component is minimum, the first performance loop becomes capacitor 21, inductance 22, first switch 24 and second opens
25 are closed, alternatively, the second performance loop becomes capacitor 21, inductance 22, third switch 26 and the 4th switch 27, so that performance loop
In electric current from the anode of discharge protection circuit by corresponding arm two IGBT switch flow directly back into cathode, due to electric discharge protect
Voltage in protection circuit is 1500v or so, therefore the electric current flowed through on discharge protection circuit is excessive, so that two of corresponding arm
IGBT switch is burned.
In the embodiment of the present invention, by the way that nor gate logic circuit is added, in electric discharge, is controlled and exported by microcontroller
The pwm signal (pulse signal) of 1MHZ exports one group of two-phase letter by having enabled and control direction nor gate logic circuit
Number.Wherein, in electric discharge, the first driving signal is pulse signal, and the second driving signal is the letter opposite with the first driving signal
Number, two using the first driving signal as the IGBT of driving signal switch (first switch and the 4th switch) conducting, duration
For the width of pulse signal, two using the second driving signal as the IGBT of driving signal switch (second switch and third switch)
Cut-off.When the first driving signal becomes low level, the second driving signal is pulse signal, at this point, two with the second driving signal
For the IGBT switch conduction of driving signal, reverse phase electric discharge is carried out, the duration is the width of pulse signal, then ends simultaneously,
One group of diphase signal electric discharge terminates at this time.
In this way, controlling the on state of two IGBT switch of H bridge corresponding arm by diphase signal, thereby may be ensured that
In discharge process, on H bridge corresponding arm, all only one IGBT switch is conducting, i.e., consistent to side arm on state, and ipsilateral
The on state of arm is inconsistent, so that by hardware circuit design, the two IGBT switch for controlling the corresponding arm of H bridge is not in
State is simultaneously turned on, avoids and burns out IGBT switch because two IGBT of H bridge corresponding arm switch simultaneously turns on, improve electric discharge and protect
The reliability and stability of protection circuit, and then guarantee that external defibrillator can be used normally in electric discharge, it improves and removes in vitro
It quivers the functional reliability and working efficiency of device.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium
In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the storage medium can be magnetic
Dish, CD, read-only memory (Read-Only Memory, ROM) or random access memory (RandomAccess
Memory, RAM) etc..
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those familiar with the art, all answers
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (4)
1. a kind of discharge protection circuit for external defibrillator, which is characterized in that the discharge protection circuit includes: capacitor, electricity
Sense, human body resistance, first electrode sheet, second electrode sheet, first switch, second switch, third switch, the 4th switch, first every
From driving circuit, the second isolated drive circuit and nor gate logic circuit, wherein
Human body resistance, first switch, second switch, third switch, the 4th switch, first electrode sheet and second electrode sheet composition
One H bridge, first switch and second switch are the arm side together of H bridge, and the 4th switch and third switch are another same arm of H bridge
Side；
One end of capacitor is connected with one end of inductance, and the second end that the other end is switched with second switch and the 4th respectively is connected；
The first end that the other end of inductance is switched with first switch and third respectively is connected；
The second end of first switch is connected with the first end of first electrode sheet and second switch respectively；
The first end that the second end of third switch is switched with second electrode sheet and the 4th respectively is connected；
Human body resistance is connected with first electrode sheet, second electrode sheet respectively；
The third end of first switch is connected with the first output end of the first isolated drive circuit；
The third end of 4th switch is connected with the second output terminal of the first isolated drive circuit；
The third end of second switch is connected with the first output end of the second isolated drive circuit；
The third end of third switch is connected with the second output terminal of the second isolated drive circuit；
Wherein, the first switch driving signal and second output terminal of the first output end output of the first isolated drive circuit export
4th switching drive signal state synchronized, amplitude is different, the second switch of the first output end output of the second isolated drive circuit
Driving signal is synchronous with the driving status signal of third switch that second output terminal exports, and amplitude is different；
First isolated drive circuit is used to carry out transformation isolation to the first driving signal of input, isolates state synchronized, amplitude
Different first switch driving signals and the 4th switching drive signal, the second isolated drive circuit are used to drive to the second of input
Dynamic signal carries out transformation isolation, isolates state synchronized, the different second switch driving signal of amplitude and third switch driving
Signal；Wherein, first switch driving signal is exported to the third end of first switch, and the 4th switching drive signal, which is exported to the 4th, to be opened
The third end of pass, second switch driving signal are exported to the third end of second switch, and third switching drive signal is exported to third
The third end of switch；
Nor gate logic circuit exports diphase signal for handling the pulse-width signal of input, by the first output end
In the first input terminal for outputing signal to the first isolated drive circuit, pass through second output terminal export in diphase signal second
Output signal to the input terminal of the second isolated drive circuit；
The nor gate logic circuit include: the first nor gate, the second nor gate, third nor gate, four nor gate, the 5th or
NOT gate and the 6th nor gate, wherein
The first input end of first nor gate and the second input terminal reception pwm signal, the first of output end and the second nor gate
Input terminal is connected；
Second input terminal of the second nor gate receives pre-set brake signal, the first input of output end and third nor gate
End and the second input terminal are connected；
The output end of third nor gate the second input terminal with the first input end of four nor gate and the 6th nor gate respectively
It is connected；
Second input terminal of four nor gate receives pre-set direction signal, and output end exports the first driving signal to first
The input terminal of isolated drive circuit；
The first input end of 5th nor gate and the second input terminal receive pre-set direction signal, output end and the 6th or
The first input end of NOT gate is connected；
The input terminal of output end output the second driving signal to the second isolated drive circuit of 6th nor gate；
The brake signal, direction signal and pwm signal are defeated according to specific control strategy by pre-set microcontroller
Out；Pwm signal can be generated and be exported by microcontroller, and microcontroller generates and adjustable PWM is fixed or changed to output duty cycle
Signal；Brake signal isSignal, direction signal are DIR signal, and the first driving signal is AHEAD signal, the second driving
Signal is CONTRARY signal；First driving signal and the second driving signal are not in the state for being simultaneously high level,
That is two IGBT switch of the corresponding arm of H bridge will not simultaneously turn on；
The first switch to the 4th switch includes: insulated gate bipolar transistor, complementary metal oxide semiconductor pipe, three poles
Pipe or bipolar junction transistor；
In vitro defibrillator work normally when, capacitor, inductance, first switch, human body, second electrode sheet, first electrode sheet and
4th switch formed the first performance loop, alternatively, capacitor, inductance, third switch, first electrode sheet, second electrode sheet, human body with
And second switch forms the second performance loop, the total impedance of discharge protection circuit be each component of discharge protection circuit impedance with
The sum of human body impedance, and the impedance of each component is much smaller than human body impedance, the human body impedance are as follows: first electrode sheet, the second electricity
The impedance R that pole piece and human body are connected to form；
In electric discharge, the pwm signal (pulse signal) of output 1MHZ is controlled by microcontroller, by having enabled and controlling party
To nor gate logic circuit, export one group of diphase signal；
Wherein, the first driving signal be pulse signal, the second driving signal be the signal opposite with the first driving signal, two with
First driving signal is the IGBT switch conduction of driving signal, and the duration is the width of pulse signal, and two with the second driving
Signal is that the IGBT of driving signal switchs cut-off；When the first driving signal becomes low level, the second driving signal is pulse letter
Number, at this point, two using the second driving signal as the IGBT switch conduction of driving signal, reverse phase electric discharge is carried out, the duration is arteries and veins
The width for rushing signal, then ends simultaneously, and one group of diphase signal electric discharge terminates at this time.
2. the discharge protection circuit according to claim 1 for external defibrillator, which is characterized in that the metal-oxide-semiconductor packet
It includes but is not limited to: P-channel metal-oxide-semiconductor or N-channel MOS pipe.
3. the discharge protection circuit according to claim 2 for external defibrillator, which is characterized in that the first end is
Drain electrode, second end are source electrode, and third end is grid.
4. a kind of external defibrillator, which is characterized in that including the described in any item discharge protection circuits of preceding claims 1-3.
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| CN115025396B (en) * | 2022-06-24 | 2023-02-10 | 深圳邦健生物医疗设备股份有限公司 | Current control dual-phase wave defibrillation device |
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| CN103100140B (en) * | 2013-01-17 | 2015-03-04 | 复旦大学 | Defibrillator bridge-type discharge circuit with discharge protection function |
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| US5824017A (en) * | 1997-03-05 | 1998-10-20 | Physio-Control Corporation | H-bridge circuit for generating a high-energy biphasic waveform in an external defibrillator |
| CN201073510Y (en) * | 2007-09-13 | 2008-06-18 | 复旦大学 | High-voltage impulse generating circuit suitable for external defibrillator |
| CN205268824U (en) * | 2015-10-16 | 2016-06-01 | 安科乐康（北京）诊断技术有限公司 | A discharging protecting circuit and external defibrillator for external defibrillator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103100140B (en) * | 2013-01-17 | 2015-03-04 | 复旦大学 | Defibrillator bridge-type discharge circuit with discharge protection function |
Non-Patent Citations (2)
| Title |
|---|
| 基于H桥控制的直流电机调速系统电路的设计;李玲弟;《华东技术师范学院毕业论文》;20130531;第24-25、41页 |
| 大功率直流电机驱动电路的设计;胡发焕 等;《机械与电子》;20091024;第77-80页 |
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| Publication number | Publication date |
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| CN105251123A (en) | 2016-01-20 |
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