Passive and passive trigger pulse generation circuit

Abstract

The utility model relates to a passive and passive trigger pulse generation circuit. The circuit comprises a charging loop and a discharging loop. The charging loop charges the energy storage capacitor; the discharge loop comprises a voltage sensitive component, after the voltage at the two ends of the energy storage capacitor reaches the set voltage value of the voltage sensitive component, the energy storage capacitor discharges through the discharge loop, and the power pulse is loaded to the load to form the power pulse. A control mode of a power pulse and a circuit topological structure principle are innovated, a passive mode is adopted, passive triggering is carried out, and the voltage of a power source is utilized (high voltage can be directly used for charging an energy storage capacitor without being converted into low voltage to charge the energy storage capacitor) to be matched with the characteristic of a passive voltage sensitive component (generally used for circuit protection traditionally); and outputting a power pulse signal.

Description

Technical Field

[0001] This utility model relates to a pulse generator, specifically to a passive, passively triggered pulse generation circuit. Background Technology

[0002] Power pulse generation technology has wide applications in many fields, including high-energy physics, industrial processing, medical treatment, radar communication, and electromagnetic pulse weapons. With continuous technological advancements, various power pulse generation methods have emerged, such as pulse forming line methods, pulse compression methods, and field flux compression methods, all of which can generate power pulses.

[0003] The generation of power pulses also requires a corresponding triggering method. Common triggering methods include: mechanical triggering, which uses switches with mechanical contacts such as relays or reed switches to deliver the pulse signal to the target load; and solid-state switch triggering, which uses IGBTs, MOSFETs, and SCRs as trigger carriers, controlling the generation of power pulses by rapidly switching on and off the control signal. Among these, semiconductor switching technology is currently the most commonly used pulse control scheme and is widely used in various applications. It requires direct control of the generation and release of high-voltage pulses through external switches or circuit logic, i.e., using a low-voltage signal as the trigger signal, and outputting a high-voltage pulse after the controlled unit operates. This method has fast switching speed, short response time, stable pulse timing, and is relatively simple to control low-voltage pulse signals. Regardless of the method, pulse triggering methods largely rely on active control signals. Figure 1 As shown.

[0004] Under current technological conditions, achieving short-pulse triggering of solid-state switching transistors is relatively complex and influenced by many factors, requiring solutions to the following challenges:

[0005] 1) Parasitic capacitance effect: Parasitic capacitances (such as gate-source capacitance Cgs, gate-drain capacitance Cgd, and drain-source capacitance Cds) existing inside the switching transistor and in its package limit its switching speed. During the switching process, these capacitors need to be charged and discharged, resulting in switching delay and energy loss.

[0006] 2) Gate drive capability: Switching speed is directly affected by the capability of the gate drive circuit. If the drive circuit cannot provide sufficient current to quickly charge and discharge the gate capacitance, it will lead to a longer switching time and affect the overall performance.

[0007] 3) Thermal effect: If the heat generated during high-speed switching cannot be dissipated in time, it will cause the junction temperature of the MOSFET to rise, thereby affecting its performance stability and even causing permanent damage.

[0008] 4) Switching noise: During high-speed switching, the rapid changes in current and voltage will generate electromagnetic interference (EMI) and radio frequency interference (RFI), which may adversely affect other circuit parts.

[0009] 5) Threshold voltage variation: The threshold voltage (Vth) of the switching transistor is affected by factors such as process parameters and temperature changes. Even small changes can significantly affect the switching characteristics and increase the complexity of the design. Utility Model Content

[0010] This invention proposes a passive, passively triggered pulse generation circuit.

[0011] The technical solution of this utility model:

[0012] A passive, passively triggered pulse generation circuit includes a charging circuit and a discharging circuit. The charging circuit charges an energy storage capacitor. The discharging circuit includes a voltage-sensitive component. After the voltage across the energy storage capacitor reaches the set voltage value of the voltage-sensitive component, the energy storage capacitor discharges through the discharging circuit, loading a power pulse onto the load to form a power pulse.

[0013] Further refining the above technical solution, the charging circuit consists of a high-voltage power supply, an energy storage capacitor, and a diode or a discharge load; the discharge circuit consists of an energy storage capacitor, a voltage-sensitive component, a current-limiting resistor, and a discharge load; the diode is connected in parallel with the discharge load.

[0014] Further refining the above technical solution, the charging circuit consists of a high-voltage power supply, an energy storage resistor, and a current-limiting resistor; the discharging circuit consists of an energy storage capacitor, voltage-sensitive components, a current-limiting resistor, and a discharge load.

[0015] To further refine the above technical solution, the voltage-sensitive component is a ceramic gas discharge tube, a glass discharge tube, or a semiconductor discharge tube.

[0016] The advantages of this utility model are that it has a reasonable design and ingenious concept. It innovates the control method and circuit topology of the power pulse, adopts a passive method, and is passively triggered. It utilizes the voltage of the power source itself (which can directly charge the energy storage capacitor with high voltage without converting to low voltage before charging the energy storage capacitor) in conjunction with the characteristics of passive voltage-sensitive components (which are generally used for circuit protection) to output a power pulse signal. It does not require a complex switching signal control circuit, does not need to consider various parasitic parameters, has the ability to conduct quickly, and the switch is resistive switching with high switching current. There is no need to consider thermal effects. The system design is simple and reliable, and it is suitable for product miniaturization design. Attached Figure Description

[0017] Figure 1It is a commonly used power pulse control method.

[0018] Figure 2 It is a passive, passively triggered pulse generation circuit topology (Example 1).

[0019] Figure 3 It is a passive, passively triggered pulse generation circuit topology (Example 2). Detailed Implementation Example

[0020] like Figure 1 As shown, a passive, passively triggered pulse generation circuit is provided, wherein a high-voltage power supply, an energy storage capacitor C1, a diode D1, and a discharge load Z1 constitute a charging circuit; and an energy storage capacitor C1, a voltage-sensitive component SW1, a current-limiting resistor R1, and a discharge load Z1 constitute a discharging circuit.

[0021] The output voltage of the (DC) high-voltage power supply is U1, the trigger voltage of the voltage-sensitive component SW1 is USW, and the voltage across the energy storage capacitor C1 is UC (initially zero). After the high-voltage power supply is turned on, the energy storage capacitor C1 is charged through diode D1 or discharge load Z1. When UC is greater than USW, the voltage-sensitive component SW1 is broken down and turned on. After it is turned on, the voltage across the voltage-sensitive component SW1 is approximately short-circuited. Since the current-limiting resistor R1 is mainly used for current limiting, the voltage across the energy storage capacitor C1 is mainly applied to the discharge load Z1, generating a fast-on-off power pulse across the discharge load Z1. When the voltage across the energy storage capacitor C1 is consumed to the turn-off voltage of the voltage-sensitive component SW1, the high-voltage power supply continues to charge the energy storage capacitor C1, and then continues to generate power pulses in the same way. Example

[0022] like Figure 2 As shown, a passive, passively triggered pulse generation circuit is provided, wherein: a high-voltage power supply, an energy storage capacitor C1, and a current-limiting resistor R1 form a charging circuit, and an energy storage capacitor C1, a current-limiting resistor R1, a discharge load Z1, and a voltage-sensitive component SW1 form a discharge circuit.

[0023] The output voltage of the (DC) high-voltage power supply is U1, the trigger voltage of the voltage-sensitive component SW1 is USW, and the voltage across the energy storage capacitor C1 is UC (initially zero). After the high-voltage power supply is turned on, the energy storage capacitor C1 is charged through the current-limiting resistor R1. When UC is greater than USW, the voltage-sensitive component SW1 is broken down and turned on. After it is turned on, the voltage across the voltage-sensitive component SW1 is approximately short-circuited. Since the current-limiting resistor R1 is mainly used for current limiting, the voltage across the energy storage capacitor C1 is mainly applied to the discharge load Z1, generating a fast-on-off power pulse across the discharge load Z1. When the voltage across the energy storage capacitor C1 is consumed to the turn-off voltage of the voltage-sensitive component SW1, the high-voltage power supply continues to charge the energy storage capacitor C1, and then continues to generate power pulses in the same way.

[0024] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope defined in the claims.

Claims

1. A passively triggered pulse generation circuit, characterized in that, The circuit includes a charging circuit and a discharging circuit; the discharging circuit includes voltage-sensitive components.

2. The passively triggered pulse generation circuit according to claim 1, characterized in that, The charging circuit consists of a high-voltage power supply, an energy storage capacitor, a diode, and a discharge load, wherein the diode and the discharge load are connected in parallel. The discharge circuit consists of an energy storage capacitor, voltage-sensitive components, a current-limiting resistor, and a discharge load.

3. The passively triggered pulse generation circuit according to claim 1, characterized in that, The charging circuit consists of a high-voltage power supply, an energy storage resistor, and a current-limiting resistor; The discharge circuit consists of an energy storage capacitor, voltage-sensitive components, a current-limiting resistor, and a discharge load.

4. The passively triggered pulse generation circuit according to claim 1, characterized in that, The voltage-sensitive component is a ceramic gas discharge tube, a glass discharge tube, or a semiconductor discharge tube.

Images