Bipolar nanosecond pulse synchronous output circuit and ablation equipment

Abstract

The utility model relates to the technical field of medical equipment, and particularly discloses a bipolar nanosecond pulse synchronous output circuit and ablation equipment, which comprise a positive pulse output circuit and a negative pulse output circuit, the positive pulse output circuit comprises a positive pulse charging unit, a positive pulse output control unit, a positive pulse transmission unit and a positive pulse output electrode wire which are electrically connected in sequence; the negative pulse output circuit comprises a negative pulse charging unit, a negative pulse output control unit, a negative pulse transmission unit and a negative pulse output electrode wire which are electrically connected in sequence; the positive pulse transmission unit at least comprises a forward multiplication transmission unit which is used for performing forward voltage multiplication or forward current multiplication on the forward output pulse signal; the negative pulse transmission unit at least comprises a negative multiplication transmission unit which is used for carrying out negative voltage multiplication or negative current multiplication on the negative output pulse signal. The bipolar nanosecond pulse synchronous output circuit provided by the utility model can improve instant pulse energy of nanosecond pulse tumor ablation equipment.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a bipolar nanosecond pulse synchronous output circuit and ablation device. Background Technology

[0002] The application of high-voltage short-pulse technology in the medical field is becoming increasingly widespread, especially in tumor ablation, plasma sterilization, and rehabilitation, where it has shown significant advantages. Pulsed electric field ablation (PFA) is an emerging technology that has completely solved the problems of non-selective ablation, obvious transition zones at the tumor edge, and susceptibility to heat sink effects that exist in traditional tumor ablation (microwave, radiofrequency, ultrasound, or laser heating or cryoablation therapy). Therefore, pulsed electric field ablation (PFA) is expected to become a mainstream product in the fields of tumor and cardiac ablation in the future.

[0003] Currently, pulsed electric field ablation (PFA) has evolved to second-generation microsecond pulse ablation and third-generation nanosecond pulse ablation. Among them, nanosecond pulse ablation has more advantages, but it is more difficult to implement. Nanosecond pulse tumor ablation equipment needs to generate a high electric field strength greater than 10 kV / cm, a nanosecond-level pulse width, and an extremely high instantaneous pulse current (greater than 300 A). In conventional nanosecond pulse implementation technologies, the bandwidth of high-frequency pulse transformers is limited by the magnetic core material and the capacitance and inductance between the windings, making it difficult to achieve high voltage and nanosecond pulse width, and the instantaneous pulse current is also small. Avalanche transistors can achieve nanosecond pulse output, but the control circuit is complex and the instantaneous output power is low. Marx generators use multi-stage capacitors to charge in parallel and then discharge in series. Even if nanosecond-level high voltage pulses can be achieved, there are technical problems such as large size, low repetition frequency, and difficulty in synchronous triggering control.

[0004] Therefore, how to improve the instantaneous pulse energy of nanosecond pulse tumor ablation equipment to achieve bipolar nanosecond pulse synchronous output has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a bipolar nanosecond pulse synchronous output circuit and ablation device, solving the problem in related technologies that cannot achieve synchronous output of nanosecond-level bipolar high-voltage pulses.

[0006] As a first aspect of this utility model, a bipolar nanosecond pulse synchronous output circuit is provided, comprising: a positive pulse output circuit and a negative pulse output circuit, wherein the positive pulse output circuit and the negative pulse output circuit are electrically connected.

[0007] The positive pulse output circuit includes a positive pulse charging unit, a positive pulse output control unit, a positive pulse transmission unit, and a positive pulse output electrode line that are connected in sequence.

[0008] The negative pulse output circuit includes a negative pulse charging unit, a negative pulse output control unit, a negative pulse transmission unit, and a negative pulse output electrode line that are connected in sequence.

[0009] The positive pulse charging unit is electrically connected to the negative pulse charging unit, and the positive pulse transmission unit is electrically connected to the negative pulse transmission unit;

[0010] The positive pulse charging unit is used to charge in the positive direction to a preset positive threshold, and the negative pulse charging unit is used to charge in the negative direction to a preset negative threshold, wherein the absolute values ​​of the preset positive threshold and the preset negative threshold are the same;

[0011] The positive pulse output control unit is used to generate a positive output pulse signal when the positive pulse charging unit is charged to a preset positive threshold, and the negative pulse output control unit is used to generate a negative output pulse signal when the negative pulse charging unit is charged to a preset negative threshold.

[0012] The positive pulse transmission unit includes at least a positive multiplication transmission unit for multiplying the positive output pulse signal by positive voltage or positive current; the negative pulse transmission unit includes at least a negative multiplication transmission unit for multiplying the negative output pulse signal by negative voltage or negative current; the multiplication magnitude of the positive output pulse signal is the same as that of the negative output pulse signal.

[0013] The positive pulse output electrode line and the negative pulse output electrode line are used to synchronously output their respective multiplied output pulse signals to the target object.

[0014] Furthermore, the forward multiplication transmission unit includes: a first forward transmission cable and a second forward transmission cable, one end of the first forward transmission cable and one end of the second forward transmission cable are connected in parallel to serve as the input end of the forward multiplication transmission unit, and the other end of the first forward transmission cable and the other end of the second forward transmission cable are connected in series to serve as the output end of the forward multiplication transmission unit.

[0015] The first forward transmission cable and the second forward transmission cable can increase the forward transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the forward output voltage of the forward multiplication transmission unit is twice the forward input voltage.

[0016] The negative multiplication transmission unit includes: a first negative transmission cable and a second negative transmission cable. One end of the first negative transmission cable and one end of the second negative transmission cable are connected in parallel to serve as the input end of the negative multiplication transmission unit. The other end of the first negative transmission cable and the other end of the second negative transmission cable are connected in series to serve as the output end of the negative multiplication transmission unit.

[0017] The first negative transmission cable and the second negative transmission cable can increase the negative transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the negative output voltage of the output terminal of the negative multiplication transmission unit is twice the negative input voltage.

[0018] Furthermore, a first magnetic ring is provided on the first forward transmission cable, and a second magnetic ring is provided on the second forward transmission cable. The core wire at one end of the first forward transmission cable is connected to the core wire of the second forward transmission cable, and the shielding layer at the other end of the first forward transmission cable is connected to the core wire at the other end of the second forward transmission cable.

[0019] A third magnetic ring is provided on the first negative transmission cable, and a fourth magnetic ring is provided on the second negative transmission cable. The core wire at one end of the first negative transmission cable is connected to the core wire of the second negative transmission cable, and the shielding layer at the other end of the first negative transmission cable is connected to the core wire at the other end of the second negative transmission cable.

[0020] Furthermore, the forward multiplication transmission unit includes: a first forward transmission cable and a second forward transmission cable, one end of the first forward transmission cable and one end of the second forward transmission cable are connected in series to serve as the input end of the forward multiplication transmission unit, and the other ends of the first forward transmission cable and the second forward transmission cable are connected in parallel to serve as the output end of the forward multiplication transmission unit.

[0021] The first forward transmission cable and the second forward transmission cable can reduce the forward transmission impedance by connecting their input terminals in series and their output terminals in parallel, so that the forward output current of the forward multiplication transmission unit is twice the forward input current.

[0022] The negative multiplication transmission unit includes: a first negative transmission cable and a second negative transmission cable. One end of the first negative transmission cable and one end of the second negative transmission cable are connected in series to serve as the input end of the negative multiplication transmission unit. The other ends of the first negative transmission cable and the second negative transmission cable are connected in parallel to serve as the output end of the negative multiplication transmission unit.

[0023] The first negative transmission cable and the second negative transmission cable can reduce the negative transmission impedance by connecting their input terminals in series and their output terminals in parallel, so that the negative output current at the output terminal of the negative multiplication transmission unit is twice the negative input current.

[0024] Furthermore, a first magnetic ring is provided on the first forward transmission cable, and a second magnetic ring is provided on the second forward transmission cable. The shielding layer at one end of the first forward transmission cable is connected to the core wire at one end of the second forward transmission cable, and the core wire at the other end of the first forward transmission cable is connected to the core wire at the other end of the second forward transmission cable.

[0025] A third magnetic ring is provided on the first negative transmission cable, and a fourth magnetic ring is provided on the second negative transmission cable. The shielding layer at one end of the first negative transmission cable is connected to the core wire at one end of the second negative transmission cable, and the core wire at the other end of the first negative transmission cable is connected to the core wire at the other end of the second negative transmission cable.

[0026] Furthermore, the positive pulse transmission unit also includes a positive base transmission unit, one end of which is connected to the output terminal of the positive multiplication transmission unit, and the other end of which is connected to the positive pulse output electrode line. The positive base transmission unit is used to transmit the positive voltage or positive current multiplied by the positive multiplication transmission unit to the positive pulse output electrode line.

[0027] The negative pulse transmission unit further includes a negative base transmission unit. One end of the negative base transmission unit is connected to the output end of the negative multiplication transmission unit, and the other end of the negative base transmission unit is connected to the negative pulse output electrode line. The negative base transmission unit is used to transmit the negative voltage or negative current multiplied by the negative multiplication transmission unit to the negative pulse output electrode line.

[0028] Furthermore, the positive pulse transmission unit also includes a positive output socket, which is located between the positive multiplication transmission unit and the positive base transmission unit. The input end of the positive output socket is connected to the two positive transmission cables of the positive multiplication output unit, and the other end of the positive output socket is connected to the positive base transmission unit.

[0029] The negative pulse transmission unit further includes a negative output socket, which is located between the negative multiplication transmission unit and the negative base transmission unit. The input end of the negative output socket is connected to two negative transmission cables of the negative multiplication output unit, and the other end of the negative output socket is connected to the negative base transmission unit.

[0030] Furthermore, the positive pulse charging unit includes: a first positive diode, a first positive inductor, and a first positive capacitor. The anode of the first positive diode is connected to the positive terminal of the power supply, the cathode of the first positive diode is connected to one end of the first positive inductor, the other end of the first positive inductor is connected to one end of the first positive capacitor, the other end of the first positive capacitor is connected to one end of the power supply inductor, and the other end of the power supply inductor is connected to the negative terminal of the power supply.

[0031] The negative pulse charging unit includes: a first negative diode, a first negative inductor, and a first negative capacitor. The cathode of the first negative diode is connected to the positive terminal of the power supply, the anode of the first negative diode is connected to one end of the first negative inductor, the other end of the first negative inductor is connected to one end of the first negative capacitor, the other end of the first negative capacitor is connected to one end of the power supply inductor, and the other end of the power supply inductor is connected to the negative terminal of the power supply.

[0032] Furthermore, the positive pulse output control unit includes: a second positive capacitor, a positive resistor, and a positive synchronization controllable switch. One end of the second positive capacitor is connected to one end of the first positive capacitor, and the other end of the second positive capacitor is connected to one end of the positive resistor. The other end of the positive resistor is connected to the positive multiplication transmission unit. One end of the positive synchronization controllable switch is connected to one end of the first positive capacitor, and the other end of the positive synchronization controllable switch is connected to the positive multiplication transmission unit. The control terminal of the positive synchronization controllable switch is connected to one end of the positive resistor.

[0033] The negative pulse output control unit includes: a second negative capacitor, a negative resistor, and a negative synchronization controllable switch. One end of the second negative capacitor is connected to one end of the first negative capacitor, and the other end of the second negative capacitor is connected to one end of the negative resistor. The other end of the negative resistor is connected to the negative multiplication transmission unit. One end of the negative synchronization controllable switch is connected to one end of the first negative capacitor, and the other end of the negative synchronization controllable switch is connected to the negative multiplication transmission unit. The control terminal of the negative synchronization controllable switch is connected to one end of the negative resistor.

[0034] As another aspect of this utility model, an ablation device is provided, which includes the bipolar nanosecond pulse synchronous output circuit described above.

[0035] The bipolar nanosecond pulse synchronous output circuit provided by this invention charges the positive pulse output circuit to a preset positive threshold using a positive pulse charging unit. Then, a positive output pulse signal is generated by the positive pulse output control unit. The positive pulse transmission unit then amplifies the positive output pulse signal by either a positive voltage or a positive current, thereby increasing the instantaneous pulse energy of the positive pulse signal reaching the target object via the positive pulse output electrode line. Similarly, the negative pulse output circuit increases the instantaneous pulse energy of the negative pulse signal reaching the target object in the same way. Both the positive and negative pulse output circuits can achieve bipolar nanosecond pulse synchronous output. Therefore, this bipolar nanosecond pulse synchronous output circuit can enhance the instantaneous pulse energy of nanosecond pulse tumor ablation devices to achieve bipolar nanosecond pulse synchronous output. Furthermore, this bipolar nanosecond pulse synchronous output circuit also has the advantages of high stability and low implementation cost. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof.

[0037] Figure 1 The structural block diagram of the bipolar nanosecond pulse synchronous output circuit provided by this utility model.

[0038] Figure 2 The schematic diagram of the bipolar nanosecond pulse synchronous output circuit provided in the voltage doubling embodiment of this utility model.

[0039] Figure 3 The schematic diagram of the bipolar nanosecond pulse synchronous output circuit provided in the current-doubling embodiment of this utility model.

[0040] Figure 4a The equivalent circuit diagram of the forward transmission cable impedance in the voltage doubling embodiment provided by this utility model.

[0041] Figure 4b The equivalent circuit diagram of the forward transmission cable impedance in the current-doubling embodiment provided by this utility model.

[0042] Figure 5 A schematic diagram of the output pulse waveform of the bipolar nanosecond pulse synchronous output circuit provided by this utility model.

[0043] Figure 6 A schematic diagram illustrating the specific implementation structure of the bipolar nanosecond pulse synchronous output circuit provided by this utility model.

[0044] Figure 7 The circuit diagram shows the specific implementation of the current multiplier in the bipolar nanosecond pulse synchronous output circuit provided by this utility model. Detailed Implementation

[0045] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0048] This embodiment provides a bipolar nanosecond pulse synchronous output circuit. Figure 1 This is a structural block diagram of a bipolar nanosecond pulse synchronous output circuit provided according to an embodiment of the present invention, as shown below. Figure 1 As shown, it includes:

[0049] A positive pulse output circuit 100 and a negative pulse output circuit 200 are electrically connected.

[0050] The positive pulse output circuit 100 includes a positive pulse charging unit 110, a positive pulse output control unit 120, a positive pulse transmission unit 130, and a positive pulse output electrode line 140 connected in sequence.

[0051] The negative pulse output circuit 200 includes a negative pulse charging unit 210, a negative pulse output control unit 220, a negative pulse transmission unit 230, and a negative pulse output electrode line 240 connected in sequence.

[0052] The positive pulse charging unit 110 is electrically connected to the negative pulse charging unit 210, and the positive pulse transmission unit 130 is electrically connected to the negative pulse transmission unit 230;

[0053] The positive pulse charging unit 110 is used for positive charging to a preset positive threshold, and the negative pulse charging unit 210 is used for negative charging to a preset negative threshold, wherein the absolute values ​​of the preset positive threshold and the preset negative threshold are the same.

[0054] The positive pulse output control unit 120 is used to generate a positive output pulse signal when the positive pulse charging unit 110 is charged to a preset positive threshold, and the negative pulse output control unit 220 is used to generate a negative output pulse signal when the negative pulse charging unit 210 is charged to a preset negative threshold.

[0055] The positive pulse transmission unit 130 includes at least a positive multiplication transmission unit 131, used to multiply the positive output pulse signal by positive voltage or positive current; the negative pulse transmission unit 230 includes at least a negative multiplication transmission unit 231, used to multiply the negative output pulse signal by negative voltage or negative current; the multiplication magnitude of the positive output pulse signal is the same as the multiplication magnitude of the negative output pulse signal;

[0056] The positive pulse output electrode line 140 and the negative pulse output electrode line 240 are used to synchronously output their respective multiplied output pulse signals to the target object.

[0057] In this embodiment of the invention, by setting a positive multiplication transmission unit in the positive pulse transmission unit, the positive output pulse signal can achieve positive voltage multiplication or positive current multiplication, thereby increasing the instantaneous pulse energy of the positive output pulse signal reaching the target object. Similarly, by setting a negative multiplication transmission unit in the negative pulse transmission unit, the negative output pulse signal can achieve negative voltage multiplication or negative current multiplication, thereby increasing the instantaneous pulse energy of the negative output pulse signal reaching the target object. Furthermore, the positive output pulse signal and the negative pulse output signal are output synchronously to form an electric field ablation zone in the target object, thus enabling synchronous output of bipolar nanosecond pulses.

[0058] Therefore, the bipolar nanosecond pulse synchronous output circuit provided by this invention charges the positive pulse output circuit to a preset positive threshold through the positive pulse charging unit. Then, a positive output pulse signal is generated through the positive pulse output control unit. The positive pulse transmission unit then amplifies the positive output pulse signal by either positive voltage or positive current, thereby increasing the instantaneous pulse energy of the positive pulse signal reaching the target through the positive pulse output electrode line. Similarly, the negative pulse output circuit increases the instantaneous pulse energy of the negative pulse signal reaching the target in the same way. Both the positive and negative pulse output circuits can achieve bipolar nanosecond pulse synchronous output. Therefore, this bipolar nanosecond pulse synchronous output circuit can enhance the instantaneous pulse energy of nanosecond pulse tumor ablation devices to achieve bipolar nanosecond pulse synchronous output. Furthermore, this bipolar nanosecond pulse synchronous output circuit also has the advantages of high stability and low implementation cost.

[0059] In this embodiment of the present invention, the positive pulse transmission unit 130 further includes a positive base transmission unit 132. One end of the positive base transmission unit 132 is connected to the output end of the positive multiplication transmission unit 131, and the other end of the positive base transmission unit 132 is connected to the positive pulse output electrode line 140. The positive base transmission unit 132 is used to transmit the positive voltage or positive current multiplied by the positive multiplication transmission unit 131 to the positive pulse output electrode line 140.

[0060] The negative pulse transmission unit 230 further includes a negative base transmission unit 232. One end of the negative base transmission unit 232 is connected to the output end of the negative multiplication transmission unit 231, and the other end of the negative base transmission unit 232 is connected to the negative pulse output electrode line 240. The negative base transmission unit 232 is used to transmit the negative voltage or negative current multiplied by the negative multiplication transmission unit 231 to the negative pulse output electrode line.

[0061] In this embodiment of the utility model, specifically as follows: Figure 2 and Figure 3 As shown, the positive base transmission unit 132 includes a positive base transmission cable 13, and the negative base transmission unit 232 includes a negative base transmission cable -13.

[0062] It should be understood that by setting up the positive base transmission unit 132 and the negative base transmission unit 232, not only can the transmission cable be extended to meet the needs of different occasions, but the electrode wire and cable can also be individually packaged and sterilized.

[0063] In this embodiment of the present invention, the positive pulse transmission unit 130 further includes a positive output socket 12, which is located between the positive multiplication transmission unit 131 and the positive base transmission unit 132. The input end of the positive output socket 12 is connected to two positive transmission cables of the positive multiplication output unit 131, and the other end of the positive output socket 12 is connected to the positive base transmission unit 132.

[0064] The negative pulse transmission unit 230 further includes a negative output socket-12, which is located between the negative multiplication transmission unit 231 and the negative base transmission unit 232. The input end of the negative output socket-12 is connected to the two negative transmission cables of the negative multiplication output unit 231, and the other end of the negative output socket-12 is connected to the negative base transmission unit 232.

[0065] It should be understood that, in this embodiment of the present invention, by setting a positive output socket in the positive pulse output circuit and a negative output socket in the negative pulse output circuit, the connection between the multiplication output unit and the basic transmission unit can be realized, and the output socket is usually set on the whole machine to facilitate the separate packaging and sterilization of electrode wires and cables.

[0066] In the embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the positive pulse charging unit 110 includes: a first positive diode 1, a first positive inductor 2 and a first positive capacitor 3. The anode of the first positive diode 1 is connected to the positive terminal of the power supply, the cathode of the first positive diode 1 is connected to one end of the first positive inductor 2, the other end of the first positive inductor 2 is connected to one end of the first positive capacitor 3, the other end of the first positive capacitor 3 is connected to one end of the power supply inductor 4, and the other end of the power supply inductor 4 is connected to the negative terminal of the power supply.

[0067] The negative pulse charging unit 210 includes: a first negative diode-1, a first negative inductor-2, and a first negative capacitor-3. The cathode of the first negative diode-1 is connected to the positive terminal of the power supply, the anode of the first negative diode-1 is connected to one end of the first negative inductor-2, the other end of the first negative inductor-2 is connected to one end of the first negative capacitor-3, the other end of the first negative capacitor-3 is connected to one end of the power supply inductor 4, and the other end of the power supply inductor 4 is connected to the negative terminal of the power supply.

[0068] In this embodiment of the invention, a positive pulse charges a first positive capacitor through a first positive diode 1 and a first positive inductor 2, and a negative pulse charges a first negative capacitor 3 through a first negative diode-1 and a first negative inductor-2. When the charging reaches a preset threshold, the first positive capacitor 3 and the first negative capacitor-3 can discharge to the positive pulse output control unit and the negative pulse output control unit together with the power supply inductor 4.

[0069] In the embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the positive pulse output control unit 120 includes: a second positive capacitor 5, a positive resistor 6, and a positive synchronization controllable switch 7. One end of the second positive capacitor 5 is connected to one end of the first positive capacitor 3, and the other end of the second positive capacitor 5 is connected to one end of the positive resistor 6. The other end of the positive resistor 6 is connected to the positive multiplication transmission unit 131. One end of the positive synchronization controllable switch 7 is connected to one end of the first positive capacitor 3, and the other end of the positive synchronization controllable switch 7 is connected to the positive multiplication transmission unit 131. The control terminal of the positive synchronization controllable switch 7 is connected to one end of the positive resistor 6.

[0070] The negative pulse output control unit 220 includes: a second negative capacitor-5, a negative resistor-6, and a negative synchronization controllable switch-7. One end of the second negative capacitor-5 is connected to one end of the first negative capacitor-3, and the other end of the second negative capacitor-5 is connected to one end of the negative resistor-6. The other end of the negative resistor-6 is connected to the negative multiplication transmission unit 231. One end of the negative synchronization controllable switch-7 is connected to one end of the first negative capacitor-3, and the other end of the negative synchronization controllable switch-7 is connected to the negative multiplication transmission unit 231. The control terminal of the negative synchronization controllable switch-7 is connected to one end of the negative resistor-6.

[0071] It should be understood that when the positive pulse charging unit 110 is charged to the preset positive threshold, it discharges to the second positive capacitor, the positive resistor 6 and the positive synchronous controllable switch 7 to output a positive pulse voltage +V_in. Similarly, when the negative pulse charging unit 210 is charged to the preset negative threshold, it discharges to the second negative capacitor -5, the negative resistor -6 and the negative synchronous controllable switch -7 to output a negative pulse voltage -V_in.

[0072] In this embodiment of the invention, in order to improve the instantaneous pulse energy of the bipolar nanosecond pulse synchronization output circuit, as a specific implementation method, such as... Figure 2As shown, the forward multiplication transmission unit 131 includes: a first forward transmission cable 8 and a second forward transmission cable 9. One end of the first forward transmission cable 8 and one end of the second forward transmission cable 9 are connected in parallel to serve as the input end of the forward multiplication transmission unit 131, and the other end of the first forward transmission cable 8 and the other end of the second forward transmission cable 9 are connected in series to serve as the output end of the forward multiplication transmission unit 131.

[0073] The first forward transmission cable 8 and the second forward transmission cable 9 can increase the forward transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the forward output voltage of the forward multiplication transmission unit 131 is twice the forward input voltage.

[0074] The negative multiplication transmission unit 231 includes: a first negative transmission cable-8 and a second negative transmission cable-9. One end of the first negative transmission cable-8 and one end of the second negative transmission cable-9 are connected in parallel to serve as the input end of the negative multiplication transmission unit 231. The other end of the first negative transmission cable-8 and the other end of the second negative transmission cable-9 are connected in series to serve as the output end of the negative multiplication transmission unit 231.

[0075] The first negative transmission cable-8 and the second negative transmission cable-9 can increase the negative transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the negative output voltage of the output terminal of the negative multiplication transmission unit 231 is twice the negative input voltage.

[0076] It should be understood that, in this embodiment of the invention, the equivalent circuit diagram of the impedances of the first forward transmission cable and the second forward transmission cable is as follows: Figure 4a As shown in the equivalent circuit diagram, the first and second forward transmission cables are connected in series after impedance matching. Compared to a single forward transmission cable, with the power remaining constant, the impedance increases by a factor of four, thus doubling the output voltage of the forward multiplication transmission unit. That is, the output voltage of the forward multiplication transmission unit is twice its forward input voltage. Similarly, the negative output voltage of the negative multiplication transmission unit is twice its negative input voltage. Specifically, as... Figure 4a As shown, the input terminals of two transmission lines with impedance Z0 are connected in parallel, with an input voltage V_in. The output terminals of the two transmission lines are connected in series. By designing the length of the transmission lines (delay time τ = L / v, where v is the wave speed), the reflected waves of each segment are synchronously superimposed at the output terminals, and the total output voltage is V_out = V_in + V_in = 2V_in. Since the input energy remains unchanged, the output current I_out = I_in / 2, and the load impedance is Z_out = 4Z_in.

[0077] After the output voltages of both the positive and negative multiplication transmission units are transmitted to their respective pulse output electrode lines, the resulting pulse width narrows. Since the total energy remains unchanged, the narrowing of the pulse width leads to an instantaneous increase in energy, thereby enhancing the instantaneous pulse energy of the pulse tumor ablation device and ultimately improving the tumor ablation effect.

[0078] In this embodiment of the utility model, in order to fine-tune the cable distribution parameters and suppress cable leakage interference, a first magnetic ring 10 is provided on the first forward transmission cable 8, and a second magnetic ring 11 is provided on the second forward transmission cable 9. The core wire at one end of the first forward transmission cable 8 is connected to the core wire of the second forward transmission cable 9, and the shielding layer at the other end of the first forward transmission cable 8 is connected to the core wire at the other end of the second forward transmission cable 9.

[0079] A third magnetic ring-10 is provided on the first negative transmission cable-8, and a fourth magnetic ring-11 is provided on the second negative transmission cable-9. One end of the core wire of the first negative transmission cable-8 is connected to the core wire of the second negative transmission cable-9, and the shielding layer of the other end of the first negative transmission cable-8 is connected to the core wire of the other end of the second negative transmission cable-9.

[0080] Specifically, such as Figure 2 As shown, multiple cables (8, 9, and -8, -9) with magnetic rings are arranged in pairs. The core wires of cables (8 and 9) are connected in parallel to the output terminal +V_in of the positive pulse output control unit 120. Multiple shielded wires are connected in parallel. Then, the core wire of the output terminal of the first forward transmission cable 8 is connected to the core wire of the forward output socket 12, as a positive pulse output +V_out = +2V_in. The core wire of the output terminal of the second forward transmission cable 9 is connected to the shielding layer of the first forward transmission cable 8, forming a series connection. In this case, the core wires of the negative transmission cables (-8, -9) are connected in parallel to the output terminal -V_in of the negative pulse output control unit 220, and the cable shields are connected in parallel. Then, the core wire of the output terminal of the first negative transmission cable -8 is connected to the core wire of the negative output socket -12 as the negative pulse output -V_out = -2V_in. The core wire of the output terminal of the second negative transmission cable -9 is connected to the shield layer of the first negative transmission cable -8 to form a series connection. The shields of the negative transmission cables (-8, -9) are connected together.

[0081] This embodiment of the present invention achieves a voltage multiplication transmission unit where the positive pulse output voltage is twice the input voltage, i.e., V_out = 2 × V_in, and the positive pulse current is reduced to half of the input current, I_out = I_in / 2; the output impedance is increased to 4 times, Z_out = 4 × Z_in2; similarly, the negative pulse output voltage is twice the input voltage, -V_out = -2 × V_in, and the pulse current is reduced to half of the input current, -I_out = -I_in / 2; the output impedance is increased to 4 times, Z_out = 4 × Z_in; the overall pulse width is T = 2L / V; the entire unit achieves bipolar nanosecond pulse synchronous voltage multiplication and high impedance output.

[0082] The ablation device developed in this embodiment can not only achieve high-energy ablation, but can also be widely used in fields such as plasma sterilization and disinfection, nerve modulation and rehabilitation.

[0083] In this embodiment of the invention, to further enhance the instantaneous pulse energy of the bipolar nanosecond pulse synchronization output circuit, as another specific implementation method, such as... Figure 3 As shown, the forward multiplication transmission unit 131 includes: a first forward transmission cable 8 and a second forward transmission cable 9. One end of the first forward transmission cable 8 and one end of the second forward transmission cable 9 are connected in series to serve as the input end of the forward multiplication transmission unit 131, and the other ends of the first forward transmission cable 8 and the second forward transmission cable 9 are connected in parallel to serve as the output end of the forward multiplication transmission unit 131.

[0084] The first forward transmission cable 8 and the second forward transmission cable 9 can reduce the forward transmission impedance by connecting their input ends in series and their output ends in parallel, so that the forward output current of the output end of the forward multiplication transmission unit 131 is twice the forward input current.

[0085] The negative multiplication transmission unit 231 includes: a first negative transmission cable-8 and a second negative transmission cable-9. One end of the first negative transmission cable-8 and one end of the second negative transmission cable-9 are connected in series to serve as the input end of the negative multiplication transmission unit 231, and the other ends of the first negative transmission cable-8 and the second negative transmission cable-9 are connected in parallel to serve as the output end of the negative multiplication transmission unit 231.

[0086] The first negative transmission cable-8 and the second negative transmission cable-9 can reduce the negative transmission impedance by connecting their input ends in series and their output ends in parallel, so that the negative output current of the output end of the negative multiplication transmission unit 231 is twice the negative input current.

[0087] It should be understood that, in this embodiment of the invention, the equivalent circuit diagram of the impedances of the first forward transmission cable and the second forward transmission cable is as follows: Figure 4b As shown in the equivalent circuit diagram, the first and second forward transmission cables are connected in parallel after impedance matching. Compared to a single forward transmission cable, with the power remaining constant, the impedance is reduced to 1 / 4 of its original value. This doubles the output current of the forward multiplication transmission unit, meaning the output current of the forward multiplication transmission unit is twice its forward input current. Similarly, the negative output current of the negative multiplication transmission unit is twice its negative input current. Specifically, as... Figure 4b As shown, the input terminals of two transmission lines with impedance Z0 are connected in series, and the input current I_in flows through the series circuit. The output terminals of the two transmission lines are connected in parallel. By designing the length of the transmission lines (delay time τ = L / v, where v is the wave speed), the reflected waves of each segment are synchronously superimposed at the output terminals. The total output current is I_out = I_in + I_in = 2I_in. Since the input energy remains unchanged, the output voltage V_out = V_in / 2 and the load impedance is Z_out = Z_in / 4.

[0088] After the output current of both the positive and negative multiplication transmission units is transmitted to their respective pulse output electrode lines, the obtained pulse width becomes narrower. Since the total energy remains unchanged, the narrowing of the pulse width results in an instantaneous increase in energy, thereby increasing the instantaneous pulse energy of the pulse tumor ablation device and thus achieving the purpose of improving the tumor ablation effect.

[0089] It should be noted that, in this embodiment of the invention, since the impedance is reduced and more closely connected to the human body impedance, the bipolar nanosecond pulse synchronous output circuit formed based on this method can effectively improve the ablation effect of the target when applied to the ablation device.

[0090] In this embodiment of the utility model, in order to fine-tune the cable distribution parameters and suppress cable leakage interference, a first magnetic ring 10 is provided on the first forward transmission cable 8, and a second magnetic ring 11 is provided on the second forward transmission cable 9. The shielding layer at one end of the first forward transmission cable 8 is connected to the core wire at one end of the second forward transmission cable 9, and the core wire at the other end of the first forward transmission cable 8 is connected to the core wire at the other end of the second forward transmission cable 9.

[0091] A third magnetic ring-10 is provided on the first negative transmission cable-8, and a fourth magnetic ring-11 is provided on the second negative transmission cable-9. The shielding layer at one end of the first negative transmission cable-8 is connected to the core wire at one end of the second negative transmission cable-9, and the core wire at the other end of the first negative transmission cable-8 is connected to the core wire at the other end of the second negative transmission cable-9.

[0092] Specifically, such as Figure 3 As shown, multiple cables (8, 9 and -8, -9) with magnetic rings are arranged in pairs. The input core of the first forward transmission cable 8 is connected to the output terminal +I_in of the positive pulse output control unit 120, and the input core of the second forward transmission cable 9 is connected to the shield of the first forward transmission cable 8, forming a series connection. The output terminals are connected in parallel to the core of the forward output socket 12, which serves as the positive pulse output +I_out = +2I_in. The shields of the cables (8, 9) are connected in parallel. Using the same method, the input core wire of the first negative transmission cable -8 is connected to the output terminal -I_in of the negative pulse output control unit 220, and the input core wire of the second negative transmission cable -9 is connected to the shielding layer of the first negative transmission cable -8, forming a series connection; the output terminal of the cable connects multiple (-8, -9) cable core wires in parallel to the core wire of the negative output socket -12 as negative pulse output -I_out = -2I_in, and the shielding wires of the cables (-8, -9) are connected together.

[0093] This embodiment of the present invention achieves a current multiplication transmission unit where the positive pulse output current is twice the input current, i.e., I_out = 2 × I_in, the positive pulse voltage drops to half of the input voltage, V_out = V_in / 2, and the output impedance is reduced by half, Z_out = Z_in / 4. Similarly, the negative pulse output current is twice the input current, i.e., -I_out = -2 × I_in, the negative pulse voltage drops to half of the input voltage, -V_out = -V_in / 2, and the negative output impedance is reduced by half, Z_out = Z_in / 4.

[0094] The bipolar nanosecond pulse synchronous output circuit of this embodiment outputs a high-voltage pulse width that is basically fixed and less than 600ns. Simultaneously, the entire device achieves bipolar nanosecond pulse synchronous current doubling and low impedance output. The instantaneous pulse current output by the entire device can exceed 350A. When this bipolar nanosecond pulse synchronous output circuit is applied in ablation equipment, it can improve the ablation effect of the target object 15. Because the pulse width is less than 600ns and the single pulse energy is less than 1J, it basically eliminates the muscle spasms and electrical tremors caused by discharge in microsecond-level PFA ablation devices, making local anesthesia possible. For example... Figure 5 The image shows the output pulse waveform of the bipolar nanosecond pulse synchronous output circuit according to an embodiment of this utility model.

[0095] The following is combined Figure 6 and Figure 7 The specific implementation of the bipolar nanosecond pulse synchronous output circuit of this utility model is described in detail.

[0096] by Figure 3Taking the current doubling embodiment shown as an example, for Figure 3 The multiplication transmission unit uses four cables, two of which multiply the output current for positive pulses and the other two for negative pulses, ultimately achieving bipolar synchronous short pulse current multiplication. The implementation principle is as follows: Figure 6 and Figure 7 As shown, it may specifically include high-frequency high-voltage cables (101, 102, 103, 104), nanocrystalline magnetic rings (201, 202, 203, 204), magnetic ring fixing posts (301, 302, 303, 304), fixing long studs (401, 402), upper and lower covers (501, 502), and coaxial cable connection sockets (601, 602).

[0097] Through such Figure 7 The high-frequency cable transmission line shown is used for series-parallel current multiplication output (+I_out=+2×I_in,-I_out=-2×I_in), and the instantaneous pulse current of the whole machine can exceed 350A, which has a good ablation effect in target ablation; the output pulse voltage is reduced by half (+V_out=+V_in / 2,-V_out=-V_in / 2), which reduces the withstand voltage test limit of the medical device application part and also reduces the electromagnetic radiation interference of the whole machine.

[0098] In this embodiment, the current-doubling circuit for bipolar short pulses uses four high-frequency coaxial cables (101-104). The cable withstand voltage, outer diameter, core wire size, and impedance characteristics are selected according to actual needs. The high-frequency cables use silver-plated copper wire braided mesh and aluminum film double shielding. The characteristic impedance can be 50Ω. The basis for selecting the length of the high-frequency cable is: L=V×T / 2, (V represents the wave propagation speed, and T represents the output pulse width).

[0099] like Figure 6 The diagram shows a specific implementation structure of this utility model embodiment. To reduce external radiation interference from the transmission cable, each cable is covered with nanocrystalline magnetic rings. These magnetic rings have high saturation magnetic induction intensity, high permeability, and good common-mode suppression and harmonic filtering effects. The preferred nanocrystalline magnetic ring model is 1K107. The inner diameter of the magnetic ring is larger than the outer diameter of the cable, and the outer diameter of the magnetic ring is smaller than the inner diameter of the PVC fixing post. The length of the PVC fixing post is determined by subtracting the exposed wire length used to connect the sockets at both ends from the length of the high-frequency cable. In this utility model embodiment, a PVC pipe or stainless steel pipe with a length of 30cm and an outer diameter of Φ50 is used, covered with heat shrink tubing. Four Φ50 inner grooves are opened on the upper and lower covers respectively to position the four PVC pipes.

[0100] The specific installation process of this utility model embodiment is as follows: First, insert the magnetic rings (201-204) into the PVC pipe columns respectively. Then, move the PVC pipe columns one by one onto the four Φ50 inner grooves of the lower cover plate, straighten the pipe columns, put on the upper cover, and tighten the upper and lower covers after positioning. Finally, fix the long studs (401-402) with screws respectively. Then, pass the high-frequency cables (101, 102) of equal length through the two PVC pipe columns on the left side of the current multiplier fixing device, and pass the high-frequency cables (103, 104) of equal length through the two PVC pipe columns on the right side of the current multiplier fixing device, and so on. Figure 7 The current multiplier circuit shown requires that the upper and lower cables of the fixing device be properly connected.

[0101] The following is the connection for the input terminal of the current multiplier: connect the core wire of the high-frequency cable 101 to the positive output (+I_in), connect the shielding layer of the input terminal of cable 101 to the core wire of the input terminal of cable 102, connect the shielding layers of the input terminals of cable 101 and cable 102 and leave them suspended, and protect the core wire connection end and the suspended shielding layer with high-voltage heat shrink tubing to form a series interface for the input terminal.

[0102] The output terminals of the current multiplier are connected as follows: the core wires of the output terminals of high-frequency cables 101 and 102 are connected in parallel to the core wires of the coaxial socket (601). The shielding layers of the output terminals of cables 101 and 102 are connected and suspended. The core wire connection terminals and the shielding layers are protected by high-voltage heat shrink tubing. The coaxial socket (601) is used as a positive high-voltage pulse output (+I_out=+2×I_in、+V_out=+V_in / 2).

[0103] Similarly, the core wire of high-frequency cable 103 is connected to the original patented bipolar synchronous short pulse negative polarity output (-I_in). The shielding layer of the input end of cable 103 is connected to the core wire of the input end of cable 104. The shielding layers of the input ends of cables 103 and 104 are connected and suspended. The core wire connection end and the suspended shielding layer are protected by high-voltage heat shrink tubing to form a series interface at the input end.

[0104] The output core wires of high-frequency cables 103 and 104 are connected in parallel to the core wires of coaxial socket 602. The shielding layers of the output ends of cables 103 and 104 are connected and suspended. The core wire connection ends and shielding layers are protected by high-voltage heat shrink tubing. Coaxial socket 602 is used as a negative high-voltage pulse output (-I_out=-2×I_in、-V_out=-V_in / 2).

[0105] In summary, the bipolar nanosecond pulse synchronous output circuit provided by this utility model can increase the instantaneous pulse energy of the nanosecond pulse tumor ablation device by multiplying the voltage or current through the multiplication transmission unit, so as to realize the bipolar nanosecond pulse synchronous output. Moreover, the bipolar nanosecond pulse synchronous output circuit also has the advantages of high stability and low implementation cost.

[0106] As another embodiment of this utility model, an ablation device is provided, which includes the bipolar nanosecond pulse synchronous output circuit described above.

[0107] The ablation device provided by this utility model, by adopting the bipolar nanosecond pulse synchronous output circuit mentioned above, can have instantaneous pulse energy when the target object is ablated, thus achieving a highly efficient and stable ablation effect.

[0108] The specific working principle of the ablation device according to this utility model embodiment can be referred to the description of the bipolar nanosecond pulse synchronous output circuit above, which will not be repeated here.

[0109] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A bipolar nanosecond pulse synchronous output circuit, characterized in that, include: A positive pulse output circuit and a negative pulse output circuit, wherein the positive pulse output circuit and the negative pulse output circuit are electrically connected; The positive pulse output circuit includes a positive pulse charging unit, a positive pulse output control unit, a positive pulse transmission unit, and a positive pulse output electrode line that are connected in sequence. The negative pulse output circuit includes a negative pulse charging unit, a negative pulse output control unit, a negative pulse transmission unit, and a negative pulse output electrode line that are connected in sequence. The positive pulse charging unit is electrically connected to the negative pulse charging unit, and the positive pulse transmission unit is electrically connected to the negative pulse transmission unit; The positive pulse charging unit is used to charge in the positive direction to a preset positive threshold, and the negative pulse charging unit is used to charge in the negative direction to a preset negative threshold, wherein the absolute values ​​of the preset positive threshold and the preset negative threshold are the same; The positive pulse output control unit is used to generate a positive output pulse signal when the positive pulse charging unit is charged to a preset positive threshold, and the negative pulse output control unit is used to generate a negative output pulse signal when the negative pulse charging unit is charged to a preset negative threshold. The positive pulse transmission unit includes at least a positive multiplication transmission unit for multiplying the positive output pulse signal by positive voltage or positive current; the negative pulse transmission unit includes at least a negative multiplication transmission unit for multiplying the negative output pulse signal by negative voltage or negative current; the multiplication magnitude of the positive output pulse signal is the same as that of the negative output pulse signal. The positive pulse output electrode line and the negative pulse output electrode line are used to synchronously output their respective multiplied output pulse signals to the target object.

2. The bipolar nanosecond pulse synchronous output circuit according to claim 1, characterized in that, The forward multiplication transmission unit includes: a first forward transmission cable and a second forward transmission cable. One end of the first forward transmission cable and one end of the second forward transmission cable are connected in parallel to serve as the input end of the forward multiplication transmission unit, and the other end of the first forward transmission cable and the other end of the second forward transmission cable are connected in series to serve as the output end of the forward multiplication transmission unit. The first forward transmission cable and the second forward transmission cable can increase the forward transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the forward output voltage of the forward multiplication transmission unit is twice the forward input voltage. The negative multiplication transmission unit includes: a first negative transmission cable and a second negative transmission cable. One end of the first negative transmission cable and one end of the second negative transmission cable are connected in parallel to serve as the input end of the negative multiplication transmission unit. The other end of the first negative transmission cable and the other end of the second negative transmission cable are connected in series to serve as the output end of the negative multiplication transmission unit. The first negative transmission cable and the second negative transmission cable can increase the negative transmission impedance by connecting their input terminals in parallel and their output terminals in series, so that the negative output voltage of the output terminal of the negative multiplication transmission unit is twice the negative input voltage.

3. The bipolar nanosecond pulse synchronous output circuit according to claim 2, characterized in that, A first magnetic ring is provided on the first forward transmission cable, and a second magnetic ring is provided on the second forward transmission cable. The core wire at one end of the first forward transmission cable is connected to the core wire of the second forward transmission cable, and the shielding layer at the other end of the first forward transmission cable is connected to the core wire at the other end of the second forward transmission cable. A third magnetic ring is provided on the first negative transmission cable, and a fourth magnetic ring is provided on the second negative transmission cable. The core wire at one end of the first negative transmission cable is connected to the core wire of the second negative transmission cable, and the shielding layer at the other end of the first negative transmission cable is connected to the core wire at the other end of the second negative transmission cable.

4. The bipolar nanosecond pulse synchronous output circuit according to claim 1, characterized in that, The forward multiplication transmission unit includes: a first forward transmission cable and a second forward transmission cable. One end of the first forward transmission cable and one end of the second forward transmission cable are connected in series to serve as the input end of the forward multiplication transmission unit. The other ends of the first forward transmission cable and the second forward transmission cable are connected in parallel to serve as the output end of the forward multiplication transmission unit. The first forward transmission cable and the second forward transmission cable can reduce the forward transmission impedance by connecting their input terminals in series and their output terminals in parallel, so that the forward output current of the forward multiplication transmission unit is twice the forward input current. The negative multiplication transmission unit includes: a first negative transmission cable and a second negative transmission cable. One end of the first negative transmission cable and one end of the second negative transmission cable are connected in series to serve as the input end of the negative multiplication transmission unit. The other ends of the first negative transmission cable and the second negative transmission cable are connected in parallel to serve as the output end of the negative multiplication transmission unit. The first negative transmission cable and the second negative transmission cable can reduce the negative transmission impedance by connecting their input terminals in series and their output terminals in parallel, so that the negative output current at the output terminal of the negative multiplication transmission unit is twice the negative input current.

5. The bipolar nanosecond pulse synchronous output circuit according to claim 4, characterized in that, A first magnetic ring is provided on the first forward transmission cable, and a second magnetic ring is provided on the second forward transmission cable. The shielding layer at one end of the first forward transmission cable is connected to the core wire at one end of the second forward transmission cable, and the core wire at the other end of the first forward transmission cable is connected to the core wire at the other end of the second forward transmission cable. A third magnetic ring is provided on the first negative transmission cable, and a fourth magnetic ring is provided on the second negative transmission cable. The shielding layer at one end of the first negative transmission cable is connected to the core wire at one end of the second negative transmission cable, and the core wire at the other end of the first negative transmission cable is connected to the core wire at the other end of the second negative transmission cable.

6. The bipolar nanosecond pulse synchronous output circuit according to any one of claims 1 to 5, characterized in that, The positive pulse transmission unit further includes a positive base transmission unit. One end of the positive base transmission unit is connected to the output end of the positive multiplication transmission unit, and the other end of the positive base transmission unit is connected to the positive pulse output electrode line. The positive base transmission unit is used to transmit the positive voltage or positive current multiplied by the positive multiplication transmission unit to the positive pulse output electrode line. The negative pulse transmission unit further includes a negative base transmission unit. One end of the negative base transmission unit is connected to the output end of the negative multiplication transmission unit, and the other end of the negative base transmission unit is connected to the negative pulse output electrode line. The negative base transmission unit is used to transmit the negative voltage or negative current multiplied by the negative multiplication transmission unit to the negative pulse output electrode line.

7. The bipolar nanosecond pulse synchronous output circuit according to claim 6, characterized in that, The positive pulse transmission unit further includes a positive output socket, which is located between the positive multiplication transmission unit and the positive base transmission unit. The input end of the positive output socket is connected to the two positive transmission cables of the positive multiplication transmission unit, and the other end of the positive output socket is connected to the positive base transmission unit. The negative pulse transmission unit further includes a negative output socket, which is located between the negative multiplication transmission unit and the negative base transmission unit. The input end of the negative output socket is connected to two negative transmission cables of the negative multiplication transmission unit, and the other end of the negative output socket is connected to the negative base transmission unit.

8. The bipolar nanosecond pulse synchronous output circuit according to any one of claims 1 to 5, characterized in that, The positive pulse charging unit includes: a first positive diode, a first positive inductor, and a first positive capacitor. The anode of the first positive diode is connected to the positive terminal of the power supply, the cathode of the first positive diode is connected to one end of the first positive inductor, the other end of the first positive inductor is connected to one end of the first positive capacitor, the other end of the first positive capacitor is connected to one end of the power supply inductor, and the other end of the power supply inductor is connected to the negative terminal of the power supply. The negative pulse charging unit includes: a first negative diode, a first negative inductor, and a first negative capacitor. The cathode of the first negative diode is connected to the positive terminal of the power supply, the anode of the first negative diode is connected to one end of the first negative inductor, the other end of the first negative inductor is connected to one end of the first negative capacitor, the other end of the first negative capacitor is connected to one end of the power supply inductor, and the other end of the power supply inductor is connected to the negative terminal of the power supply.

9. The bipolar nanosecond pulse synchronous output circuit according to claim 8, characterized in that, The positive pulse output control unit includes: a second positive capacitor, a positive resistor, and a positive synchronization controllable switch. One end of the second positive capacitor is connected to one end of the first positive capacitor, and the other end of the second positive capacitor is connected to one end of the positive resistor. The other end of the positive resistor is connected to the positive multiplication transmission unit. One end of the positive synchronization controllable switch is connected to one end of the first positive capacitor, and the other end of the positive synchronization controllable switch is connected to the positive multiplication transmission unit. The control terminal of the positive synchronization controllable switch is connected to one end of the positive resistor. The negative pulse output control unit includes: a second negative capacitor, a negative resistor, and a negative synchronization controllable switch. One end of the second negative capacitor is connected to one end of the first negative capacitor, and the other end of the second negative capacitor is connected to one end of the negative resistor. The other end of the negative resistor is connected to the negative multiplication transmission unit. One end of the negative synchronization controllable switch is connected to one end of the first negative capacitor, and the other end of the negative synchronization controllable switch is connected to the negative multiplication transmission unit. The control terminal of the negative synchronization controllable switch is connected to one end of the negative resistor.

10. An ablation device, characterized in that, Includes the bipolar nanosecond pulse synchronous output circuit as described in any one of claims 1 to 9.

Images