Mutual feedback circuit applied to external defibrillator and external defibrillator

Abstract

The utility model relates to a mutual feedback circuit applied to an external defibrillator and the external defibrillator. The mutual feedback circuit applied to the external defibrillator comprises a single-chip microcomputer, and a first signal processing module, a second signal processing module, a third signal processing module and a fourth signal processing module which are electrically connected with the single-chip microcomputer. The first signal processing module comprises a first triode, a first IGBT and a second IGBT. The second signal processing module comprises a second triode, a third IGBT and a fourth IGBT; the third signal processing module comprises a third triode, a fifth IGBT (Insulated Gate Bipolar Translator) and a sixth IGBT; the fourth signal processing module comprises a fourth triode, a seventh IGBT (Insulated Gate Bipolar Translator) and an eighth IGBT; the emitting electrode of the second IGBT is further connected with the positive electrode of the electrode plate, and the emitting electrode of the seventh IGBT is further connected with the negative electrode of the electrode plate. The mutual feedback circuit applied to the external defibrillator can optimize and adjust the electric energy waveform output by the electrode slice, and ensures that the external defibrillator can play an optimal treatment effect.

Description

Technical Field

[0001] The utility model relates to the technical field of external defibrillators, in particular to a mutual feedback circuit applied to an external defibrillator and an external defibrillator. Background Art

[0002] An external defibrillator is a portable medical device that can diagnose specific arrhythmias and deliver an electric shock for defibrillation. It is a medical device that can be used by non-professionals to rescue patients with cardiac arrest.

[0003] With the continuous evolution and improvement of mutual feedback circuit technology, the mutual feedback circuit has become a crucial part of various automatic control systems, signal processing systems, and sensor systems. In an external defibrillator, the development of the application of mutual feedback circuit technology allows these devices to more accurately identify abnormal heart rhythms and implement more appropriate treatments, greatly improving the survival rate of patients with cardiac arrest. However, in the related art, there are many defects in the design of the mutual feedback circuit in the external defibrillator, resulting in an unsatisfactory electric shock waveform output by the external defibrillator, which affects the use effect of the external defibrillator. Summary of the Utility Model

[0004] Based on this, in view of the problem that there are many defects in the design of the mutual feedback circuit in the external defibrillator in the related art, resulting in an unsatisfactory electric shock waveform output by the external defibrillator, which affects the use effect of the external defibrillator, it is necessary to provide a mutual feedback circuit applied to an external defibrillator and an external defibrillator.

[0005] A mutual feedback circuit applied to an external defibrillator, the external defibrillator further includes a heart sensor and electrode pads. The heart sensor is used to acquire the electrical signal of the patient's heart, and the electrode pads are used to apply electrical energy to the patient's heart according to the electrical signal. The mutual feedback circuit is used to acquire the electrical energy waveform information applied by the electrode pads, and output waveform correction information according to the electrical energy waveform information to correct the electrical energy waveform applied by the electrode pads.

[0006] The mutual feedback circuit includes a single-chip microcomputer and a first signal processing module, a second signal processing module, a third signal processing module, and a fourth signal processing module respectively and electrically connected to the single-chip microcomputer.

[0007] The first signal processing module includes a first triode, and a first IGBT and a second IGBT respectively connected to the first triode and connected in parallel with each other.

[0008] The second signal processing module includes a second triode, and a third IGBT and a fourth IGBT respectively connected to the second triode and connected in parallel with each other.

[0009] The third signal processing module includes a third triode, and a fifth IGBT and a sixth IGBT that are respectively connected to the third triode and are connected in parallel with each other;

[0010] The fourth signal processing module includes a fourth triode, and a seventh IGBT and an eighth IGBT that are respectively connected to the fourth triode and are connected in parallel with each other;

[0011] The collector of the first IGBT is connected to the collector of the eighth IGBT, the emitter is connected to the collector of the second IGBT, and the gate is connected to the collector of the first triode;

[0012] The gate of the second IGBT is connected to the collector of the first triode, and the emitter is connected to the collector of the third IGBT;

[0013] The gate of the third IGBT is connected to the collector of the second triode, and the emitter is connected to the collector of the fourth IGBT;

[0014] The gate of the fourth IGBT is connected to the collector of the second triode, and the emitter is connected to the emitter of the fifth IGBT;

[0015] The gate of the fifth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the sixth IGBT;

[0016] The gate of the sixth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the seventh IGBT;

[0017] The gate of the seventh IGBT is connected to the collector of the fourth triode, and the collector is connected to the emitter of the eighth IGBT;

[0018] The gate of the eighth IGBT is connected to the collector of the fourth triode;

[0019] The emitters of the first triode, the second triode, the third triode and the fourth triode are respectively grounded, and the bases of the first triode, the second triode, the third triode and the fourth triode are respectively connected to the single-chip microcomputer;

[0020] The emitter of the second IGBT is also connected to the positive electrode of the electrode plate, and the emitter of the seventh IGBT is also connected to the negative electrode of the electrode plate.

[0021] The above-mentioned mutual feedback circuit applied to an external defibrillator includes a single-chip microcomputer and a first signal processing module, a second signal processing module, a third signal processing module, and a fourth signal processing module that are electrically connected to the single-chip microcomputer respectively; the first signal processing module includes a first triode, and a first IGBT and a second IGBT that are respectively connected to the first triode and are connected in parallel with each other; the second signal processing module includes a second triode, and a third IGBT and a fourth IGBT that are respectively connected to the second triode and are connected in parallel with each other; the third signal processing module includes a third triode, and a fifth IGBT and a sixth IGBT that are respectively connected to the third triode and are connected in parallel with each other; the fourth signal processing module includes a fourth triode, and a seventh IGBT and an eighth IGBT that are respectively connected to the fourth triode and are connected in parallel with each other; the emitters of the first triode, the second triode, the third triode, and the fourth triode are respectively grounded, the bases of the first triode, the second triode, the third triode, and the fourth triode are respectively connected to the single-chip microcomputer, the emitter of the second IGBT is also connected to the positive electrode of the electrode plate, and the emitter of the seventh IGBT is also connected to the negative electrode of the electrode plate. When the mutual feedback circuit is working, the single-chip microcomputer detects the electrical energy waveform information applied by the electrode plate in real time, and controls the on-off of the first triode, the second triode, the third triode, and the fourth triode according to the electrical energy waveform information applied by the electrode plate, and further controls the on-off of the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT, and the eighth IGBT. When the mutual feedback circuit is in the working state, when the first IGBT, the second IGBT, the fifth IGBT, and the sixth IGBT are turned on, the third IGBT, the fourth IGBT, the seventh IGBT, and the eighth IGBT are turned off; when the first IGBT, the second IGBT, the fifth IGBT, and the sixth IGBT are turned off, the third IGBT, the fourth IGBT, the seventh IGBT, and the eighth IGBT are turned on. Through the above working mode, the electrical energy waveform applied by the electrode plate is a bidirectional truncated wave, which helps to reduce the unnecessary damage to the heart when the external defibrillator is working and improve the defibrillation effect.

[0022] In one embodiment, the first signal processing module further includes a first optocoupler and a second optocoupler, the second signal processing module further includes a third optocoupler and a fourth optocoupler, the third signal processing module further includes a fifth optocoupler and a sixth optocoupler, and the fourth signal processing module further includes a seventh optocoupler and an eighth optocoupler;

[0023] The gate of the first IGBT is connected to the collector of the first triode through the first optocoupler, the gate of the second IGBT is connected to the collector of the first triode through the second optocoupler, the gate of the third IGBT is connected to the collector of the second triode through the third optocoupler, the gate of the fourth IGBT is connected to the collector of the second triode through the fourth optocoupler, the gate of the fifth IGBT is connected to the collector of the third triode through the fifth optocoupler, the gate of the sixth IGBT is connected to the collector of the third triode through the sixth optocoupler, the gate of the seventh IGBT is connected to the collector of the fourth triode through the seventh optocoupler, and the gate of the eighth IGBT is connected to the collector of the fourth triode through the eighth optocoupler.

[0024] In one embodiment, the first triode, the second triode, the third triode, and the fourth triode are triodes of the same model.

[0025] In one embodiment, the first triode, the second triode, the third triode, and the fourth triode are all S8050 triodes.

[0026] In one embodiment, the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT, and the eighth IGBT are IGBTs of the same model.

[0027] In one embodiment, the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT, and the eighth IGBT are all IKW40N120H3 IGBTs.

[0028] In one embodiment, the first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler, and the eighth optocoupler are optocouplers of the same model.

[0029] In one embodiment, the first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler, and the eighth optocoupler are all TLP155E optocouplers.

[0030] In one embodiment, the circuit topologies of the first signal processing module, the second signal processing module, the third signal processing module, and the fourth signal processing module are the same.

[0031] An external defibrillator, the external defibrillator includes a heart sensor, electrode pads and the mutual feedback circuit applied to the external defibrillator as described above. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of the mutual feedback circuit applied to the external defibrillator of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the external defibrillator of the present invention;

[0034] Among them, c represents the collectors of the first, second, third, and fourth triodes, b represents the bases of the first, second, third, and fourth triodes, e represents the emitters of the first, second, third, and fourth triodes, C represents the collectors of the first, second, third, fourth, fifth, sixth, seventh, and eighth IGBTs, B represents the gates of the first, second, third, fourth, fifth, sixth, seventh, and eighth IGBTs, and E represents the emitters of the first, second, third, fourth, fifth, sixth, seventh, and eighth IGBTs. Detailed Embodiments

[0035] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model herein are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0038] This utility model discloses a mutual feedback circuit applied to an external defibrillator and an external defibrillator.

[0039] As Figures 1 to 2 shown, the external defibrillator further includes a cardiac sensor and electrode pads. The cardiac sensor is used to acquire the electrical signals of the patient's heart, and the electrode pads are used to apply electrical energy to the patient's heart according to the electrical signals. The mutual feedback circuit is used to acquire the electrical energy waveform information applied by the electrode pads and output waveform correction information to the electrode pads according to the electrical energy waveform information to correct the electrical energy waveform applied by the electrode pads.

[0040] The mutual feedback circuit includes a single-chip microcomputer and a first signal processing module, a second signal processing module, a third signal processing module, and a fourth signal processing module that are electrically connected to the single-chip microcomputer respectively; the first signal processing module includes a first triode, and a first IGBT and a second IGBT that are respectively connected to the first triode and are connected in parallel with each other; the second signal processing module includes a second triode, and a third IGBT and a fourth IGBT that are respectively connected to the second triode and are connected in parallel with each other; the third signal processing module includes a third triode, and a fifth IGBT and a sixth IGBT that are respectively connected to the third triode and are connected in parallel with each other; the fourth signal processing module includes a fourth triode, and a seventh IGBT and an eighth IGBT that are respectively connected to the fourth triode and are connected in parallel with each other; the collector of the first IGBT is connected to the collector of the eighth IGBT, the emitter is connected to the collector of the second IGBT, and the gate is connected to the collector of the first triode; the gate of the second IGBT is connected to the collector of the first triode, and the emitter is connected to the collector of the third IGBT; the gate of the third IGBT is connected to the collector of the second triode, and the emitter is connected to the collector of the fourth IGBT; the gate of the fourth IGBT is connected to the collector of the second triode, and the emitter is connected to the emitter of the fifth IGBT; the gate of the fifth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the sixth IGBT; the gate of the sixth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the seventh IGBT; the gate of the seventh IGBT is connected to the collector of the fourth triode, and the collector is connected to the emitter of the eighth IGBT; the gate of the eighth IGBT is connected to the collector of the fourth triode; the emitters of the first triode, the second triode, the third triode, and the fourth triode are respectively grounded, and the bases of the first triode, the second triode, the third triode, and the fourth triode are respectively connected to the single-chip microcomputer; the emitter of the second IGBT is also connected to the positive electrode of the electrode plate, and the emitter of the seventh IGBT is also connected to the negative electrode of the electrode plate.

[0041] Among them, IGBT (Insulate-Gate Bipolar Transistor) is a three-terminal semiconductor switching device that can be used for efficient and fast switching in a variety of electronic devices. IGBTs are mainly used in amplifiers to switch / process complex waveforms through Pulse Width Modulation (PWM).

[0042] The mutual feedback circuit applied to the external defibrillator mentioned above includes a single-chip microcomputer and a first signal processing module, a second signal processing module, a third signal processing module, and a fourth signal processing module that are electrically connected to the single-chip microcomputer respectively; the first signal processing module includes a first triode, and a first IGBT and a second IGBT that are respectively connected to the first triode and are connected in parallel with each other; the second signal processing module includes a second triode, and a third IGBT and a fourth IGBT that are respectively connected to the second triode and are connected in parallel with each other; the third signal processing module includes a third triode, and a fifth IGBT and a sixth IGBT that are respectively connected to the third triode and are connected in parallel with each other; the fourth signal processing module includes a fourth triode, and a seventh IGBT and an eighth IGBT that are respectively connected to the fourth triode and are connected in parallel with each other; the emitters of the first triode, the second triode, the third triode, and the fourth triode are grounded respectively, the bases of the first triode, the second triode, the third triode, and the fourth triode are respectively connected to the single-chip microcomputer, the emitter of the second IGBT is also connected to the positive electrode of the electrode plate, and the emitter of the seventh IGBT is also connected to the negative electrode of the electrode plate. When the mutual feedback circuit is working, the single-chip microcomputer detects the electrical energy waveform information applied by the electrode plate in real time, and controls the on / off of the first triode, the second triode, the third triode, and the fourth triode according to the electrical energy waveform information applied by the electrode plate, and further controls the on / off of the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT, and the eighth IGBT. When the mutual feedback circuit is in the working state, when the first IGBT, the second IGBT, the fifth IGBT, and the sixth IGBT are turned on, the third IGBT, the fourth IGBT, the seventh IGBT, and the eighth IGBT are turned off; when the first IGBT, the second IGBT, the fifth IGBT, and the sixth IGBT are turned off, the third IGBT, the fourth IGBT, the seventh IGBT, and the eighth IGBT are turned on. Through the above working mode, the electrical energy waveform applied by the electrode plate is a bidirectional truncated wave, which helps to reduce the unnecessary damage to the heart during the operation of the external defibrillator and improve the defibrillation effect.

[0043] Among them, the first signal processing module further includes a first optocoupler and a second optocoupler, the second signal processing module further includes a third optocoupler and a fourth optocoupler, the third signal processing module further includes a fifth optocoupler and a sixth optocoupler, and the fourth signal processing module further includes a seventh optocoupler and an eighth optocoupler;

[0044] The gate of the first IGBT is connected to the collector of the first triode through the first optocoupler, the gate of the second IGBT is connected to the collector of the first triode through the second optocoupler, the gate of the third IGBT is connected to the collector of the second triode through the third optocoupler, the gate of the fourth IGBT is connected to the collector of the second triode through the fourth optocoupler, the gate of the fifth IGBT is connected to the collector of the third triode through the fifth optocoupler, the gate of the sixth IGBT is connected to the collector of the third triode through the sixth optocoupler, the gate of the seventh IGBT is connected to the collector of the fourth triode through the seventh optocoupler, and the gate of the eighth IGBT is connected to the collector of the fourth triode through the eighth optocoupler.

[0045] By setting the first optocoupler, electrical isolation is formed between the first triode and the first IGBT, which can prevent interference to the operation processes of the first triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the second optocoupler, electrical isolation is formed between the first triode and the second IGBT, which can prevent interference to the operation processes of the first triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the third optocoupler, electrical isolation is formed between the second triode and the third IGBT, which can prevent interference to the operation processes of the second triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the fourth optocoupler, electrical isolation is formed between the second triode and the fourth IGBT, which can prevent interference to the operation processes of the second triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the fifth optocoupler, electrical isolation is formed between the third triode and the fifth IGBT, which can prevent interference to the operation processes of the third triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the sixth optocoupler, electrical isolation is formed between the third triode and the sixth IGBT, which can prevent interference to the operation processes of the third triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the seventh optocoupler, electrical isolation is formed between the fourth triode and the seventh IGBT, which can prevent interference to the operation processes of the fourth triode and the single-chip microcomputer during the operation of the external defibrillator; by setting the eighth optocoupler, electrical isolation is formed between the fourth triode and the eighth IGBT, which can prevent interference to the operation processes of the fourth triode and the single-chip microcomputer during the operation of the external defibrillator.

[0046] Among them, the models of the first triode, the second triode, the third triode and the fourth triode can be set according to the actual situation. Preferably, the first triode, the second triode, the third triode and the fourth triode adopt triodes of the same model. Further, the first triode, the second triode, the third triode and the fourth triode are, for example, all S8050 type triodes.

[0047] Among them, the models of the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT can be set according to the actual situation. Preferably, the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT adopt triodes of the same model. Further, the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT are all IGBTs of the IKW40N120H3 type.

[0048] Among them, the models of the first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler and the eighth optocoupler can be set according to the actual situation. Preferably, the first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler and the eighth optocoupler adopt optocouplers of the same model. Further, the first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler and the eighth optocoupler are all optocouplers of the TLP155E type.

[0049] Among them, the circuit topologies of the first signal processing module, the second signal processing module, the third signal processing module and the fourth signal processing module can be set according to the actual situation. Preferably, the circuit topologies of the first signal processing module, the second signal processing module, the third signal processing module and the fourth signal processing module are the same.

[0050] The present utility model also discloses an external defibrillator. The external defibrillator includes a heart sensor, electrode pads and the mutual feedback circuit applied to the external defibrillator as described above. When the external defibrillator works, the single-chip microcomputer detects the electric energy waveform information applied by the electrode pads in real time, and controls the on-off of the first triode, the second triode, the third triode and the fourth triode according to the electric energy waveform information applied by the electrode pads, and further controls the on-off of the first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT. When the external defibrillator is in the working state, when the first IGBT, the second IGBT, the fifth IGBT and the sixth IGBT are turned on, the third IGBT, the fourth IGBT, the seventh IGBT and the eighth IGBT are turned off; when the first IGBT, the second IGBT, the fifth IGBT and the sixth IGBT are turned off, the third IGBT, the fourth IGBT, the seventh IGBT and the eighth IGBT are turned on. Through the above working mode, the electric energy waveform applied by the electrode pads is a bidirectional truncated wave, which helps to reduce the unnecessary damage to the heart when the external defibrillator works and improve the defibrillation effect.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0052] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A mutual feedback circuit applied to an external defibrillator, characterized in that, The external defibrillator further includes a cardiac sensor and electrode pads. The cardiac sensor is used to acquire the electrical signals of the patient's heart, and the electrode pads are used to apply electrical energy to the patient's heart according to the electrical signals. The mutual feedback circuit is used to acquire the waveform information of the electrical energy applied by the electrode pads, and output waveform correction information to the electrode pads according to the waveform information of the electrical energy to correct the waveform of the electrical energy applied by the electrode pads. The mutual feedback circuit includes a single-chip microcomputer and a first signal processing module, a second signal processing module, a third signal processing module, and a fourth signal processing module that are electrically connected to the single-chip microcomputer respectively. The first signal processing module includes a first triode, and a first IGBT and a second IGBT that are respectively connected to the first triode and are connected in parallel with each other. The second signal processing module includes a second triode, and a third IGBT and a fourth IGBT that are respectively connected to the second triode and are connected in parallel with each other. The third signal processing module includes a third triode, and a fifth IGBT and a sixth IGBT that are respectively connected to the third triode and are connected in parallel with each other. The fourth signal processing module includes a fourth triode, and a seventh IGBT and an eighth IGBT that are respectively connected to the fourth triode and are connected in parallel with each other. The collector of the first IGBT is connected to the collector of the eighth IGBT, the emitter is connected to the collector of the second IGBT, and the gate is connected to the collector of the first triode. The gate of the second IGBT is connected to the collector of the first triode, and the emitter is connected to the collector of the third IGBT. The gate of the third IGBT is connected to the collector of the second triode, and the emitter is connected to the collector of the fourth IGBT. The gate of the fourth IGBT is connected to the collector of the second triode, and the emitter is connected to the emitter of the fifth IGBT. The gate of the fifth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the sixth IGBT. The gate of the sixth IGBT is connected to the collector of the third triode, and the collector is connected to the emitter of the seventh IGBT. The gate of the seventh IGBT is connected to the collector of the fourth triode, and the collector is connected to the emitter of the eighth IGBT. The gate of the eighth IGBT is connected to the collector of the fourth triode. The emitters of the first triode, the second triode, the third triode, and the fourth triode are respectively grounded, and the bases of the first triode, the second triode, the third triode, and the fourth triode are respectively connected to the single-chip microcomputer. The emitter of the second IGBT is further connected to the positive electrode of the electrode pad, and the emitter of the seventh IGBT is further connected to the negative electrode of the electrode pad.

2. The mutual feedback circuit applied to an external defibrillator according to claim 1, wherein, The first signal processing module further includes a first optocoupler and a second optocoupler, the second signal processing module further includes a third optocoupler and a fourth optocoupler, the third signal processing module further includes a fifth optocoupler and a sixth optocoupler, and the fourth signal processing module further includes a seventh optocoupler and an eighth optocoupler. The gate of the first IGBT is connected to the collector of the first triode through the first optocoupler; the gate of the second IGBT is connected to the collector of the first triode through the second optocoupler; the gate of the third IGBT is connected to the collector of the second triode through the third optocoupler; the gate of the fourth IGBT is connected to the collector of the second triode through the fourth optocoupler; the gate of the fifth IGBT is connected to the collector of the third triode through the fifth optocoupler; the gate of the sixth IGBT is connected to the collector of the third triode through the sixth optocoupler; the gate of the seventh IGBT is connected to the collector of the fourth triode through the seventh optocoupler; the gate of the eighth IGBT is connected to the collector of the fourth triode through the eighth optocoupler.

3. The mutual feedback circuit applied to an external defibrillator according to claim 2, wherein The first triode, the second triode, the third triode and the fourth triode are triodes of the same model.

4. The mutual feedback circuit applied to an external defibrillator according to claim 3, characterized in that, The first triode, the second triode, the third triode and the fourth triode are all S8050 type triodes.

5. The mutual feedback circuit applied to an external defibrillator according to claim 4, characterized in that The first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT are IGBTs of the same model.

6. The mutual feedback circuit applied to an external defibrillator according to claim 5, characterized in that, The first IGBT, the second IGBT, the third IGBT, the fourth IGBT, the fifth IGBT, the sixth IGBT, the seventh IGBT and the eighth IGBT are all IKW40N120H3 type IGBTs.

7. The mutual feedback circuit applied to an external defibrillator according to claim 6, characterized in that, The first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler and the eighth optocoupler are optocouplers of the same model.

8. The mutual feedback circuit applied to an external defibrillator according to claim 7, characterized in that, The first optocoupler, the second optocoupler, the third optocoupler, the fourth optocoupler, the fifth optocoupler, the sixth optocoupler, the seventh optocoupler and the eighth optocoupler are all TLP155E type optocouplers.

9. The mutual feedback circuit applied to an external defibrillator according to claim 8, wherein The circuit topologies of the first signal processing module, the second signal processing module, the third signal processing module and the fourth signal processing module are the same.

10. An external defibrillator, characterized in that, The external defibrillator includes a cardiac sensor, electrode pads and the mutual feedback circuit applied to the external defibrillator according to any one of claims 1 to 9.

Images