Miniature high-voltage module for nuclear radiation detector

Abstract

The utility model discloses a miniature high-voltage module for a nuclear radiation detector. The miniature high-voltage module comprises a Boost chip circuit, a driving circuit and a voltage doubling rectifying circuit, the input end of the Boost chip circuit is connected with a power supply, the output end of the Boost chip circuit is connected with the driving circuit, and the Boost chip circuit is used for boosting the voltage input into the input end of the Boost chip circuit and outputting the boosted voltage to the driving circuit; the driving circuit is used for providing bidirectional current for the voltage doubling rectifying circuit based on the voltage output by the output end of the Boost chip circuit; and the voltage doubling rectifying circuit is used for amplifying the voltage output by the driving circuit and outputting a target voltage meeting the detection condition of the nuclear radiation detector. According to the module, the Boost chip circuit is adopted, the size of the miniature high-voltage module can be optimized, meanwhile, the miniature high-voltage module is additionally provided with the driving circuit, the requirement of some special detectors for large current is met, and the adaptation degree between the miniature high-voltage module and the nuclear radiation detector can be improved.

Description

Technical Field

[0001] This application relates to the field of electronic technology, and in particular to a miniature high-voltage module for use in nuclear radiation detectors. Background Technology

[0002] Nuclear radiation detectors convert physical radiation signals into measurable voltage signals. These detectors require a high bias voltage from the system. Only under an excitation high-voltage electric field can the weak electronic signals generated by the physical radiation signals be amplified and detected by subsequent circuitry.

[0003] In existing technologies, transformers are typically used to step up the voltage and combine them with voltage multiplier rectifiers to generate a high-voltage electric field. However, the high-voltage circuit constructed in this way is large in size, consumes a lot of power, and has a weak driving current capability, which cannot meet the high current requirements of some special detectors. Utility Model Content

[0004] In view of the above-mentioned technological status, this application provides a miniature high-voltage module for nuclear radiation detectors to solve the problems that existing high-voltage circuits are large in size, consume a lot of power, and have weak driving current capability, which cannot meet the high current requirements of some special detectors.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A miniature high-voltage module for a nuclear radiation detector includes: a Boost converter chip circuit, a driver circuit, and a voltage doubler rectifier circuit. The input terminal of the Boost converter chip circuit is connected to a power supply, and the output terminal of the Boost converter chip circuit is connected to the driver circuit. The Boost converter chip circuit is used to boost the voltage input to its input terminal and output the boosted voltage to the driver circuit. The driver circuit is used to provide bidirectional current to the voltage doubler rectifier circuit based on the voltage output from the output terminal of the Boost converter chip circuit. The voltage doubler rectifier circuit is used to amplify the voltage output from the driver circuit and output a target voltage that meets the detection conditions of the nuclear radiation detector.

[0007] In one optional embodiment of this application, the driving circuit includes: a first driving sub-circuit, a second driving sub-circuit, a first capacitor, and a second capacitor; the first driving sub-circuit and the second driving sub-circuit are arranged in a symmetrical push-pull driving topology; one end of the first capacitor is connected to the input terminal of the first driving sub-circuit, and the other end is connected to the input terminal of the second driving sub-circuit and the output terminal of the Boost converter chip circuit, respectively; the output terminals of the first driving sub-circuit and the second driving sub-circuit are connected to one end of the second capacitor; the other end of the second capacitor is connected to the input terminal of the voltage doubler rectifier circuit.

[0008] In one optional embodiment of this application, the first driving sub-circuit includes: a first resistor, a second resistor, a first NPN diode, a third capacitor, a third resistor, a fourth resistor, a first PNP diode, and a first inductor; the base of the first NPN diode is connected to one end of the first resistor, the second resistor, and the first capacitor; the collector of the first NPN diode is connected to the other end of the first resistor; the emitter of the first NPN diode is connected to the other end of the second resistor; one end of the third capacitor is connected to the collector of the first NPN diode and one end of the third resistor; the other end of the third capacitor is connected to the emitter of the first NPN diode and one end of the fourth resistor; the base of the first PNP diode is connected to the other end of the fourth resistor; the emitter of the first PNP diode is connected to the other end of the third resistor; the collector of the first PNP diode is connected to one end of the first inductor; the other end of the first inductor is connected to the second resistor. The first driving sub-circuit includes: a fifth resistor, a sixth resistor, a second PNP diode, a fourth capacitor, a seventh resistor, an eighth resistor, a second NPN diode, and a second inductor; the base of the second PNP diode is connected to the other ends of the fifth resistor, the sixth resistor, and the first capacitor; the emitter of the second PNP diode is connected to the other end of the fifth resistor; the collector of the second PNP diode is connected to the other end of the sixth resistor; one end of the fourth capacitor is connected to the collector of the second PNP diode and one end of the seventh resistor; the other end of the fourth capacitor is connected to the emitter of the second PNP diode and one end of the eighth resistor; the base of the second NPN diode is connected to the other end of the eighth resistor; the emitter of the second NPN diode is connected to the other end of the seventh resistor; the collector of the second NPN diode is connected to one end of the second inductor; and the other end of the second inductor is connected to one end of the second capacitor.

[0009] In one optional embodiment of this application, the Boost converter chip circuit includes: a Boost converter chip, a third inductor, an isolation diode, a ninth resistor, and a tenth resistor; the Boost converter chip includes: an input power supply pin, a switch pin, and a feedback pin; the input power supply pin is connected to a power supply and one end of the third inductor; the switch pin is connected to the other end of the third inductor and the positive terminal of the isolation diode; the negative terminal of the isolation diode is connected to one end of the ninth resistor and the output terminal of the Boost converter chip; the feedback pin is connected to the other end of the ninth resistor and one end of the tenth resistor; the other end of the tenth resistor is grounded.

[0010] In one optional embodiment of this application, the voltage multiplier rectifier circuit includes: m cascaded voltage multiplier sub-circuits, each of which is used to amplify the voltage output by the driving circuit step by step to output a target voltage that meets the detection conditions of the nuclear radiation detector; m is a positive integer.

[0011] In one optional embodiment of this application, the voltage multiplier circuit includes: a first diode, a second diode, and a fifth capacitor; the anode of the first diode is connected to the cathode of the second diode, the first terminal of the fifth capacitor is connected to the cathode of the first diode, and the second terminal of the fifth capacitor is connected to the anode of the second diode; wherein, the anode of the first diode and the cathode of the second diode in the i-th voltage multiplier circuit includes an i-th node; the first node of the first voltage multiplier circuit is connected to the input terminal of the voltage multiplier rectifier circuit; the cathode of the first diode in the m-th voltage multiplier circuit is connected to the output terminal of the voltage multiplier rectifier circuit; the i-th node and the (i+1)-th node of adjacent voltage multiplier circuits are connected through a sixth capacitor; the cathode of the first diode in the i-th stage voltage multiplier circuit is connected to the anode of the second diode in the (i+1)-th stage voltage multiplier circuit; the fifth capacitors of adjacent voltage multiplier circuits are connected in series; i is a positive integer greater than 1.

[0012] In one optional embodiment of this application, it further includes: a filtering circuit; the filtering circuit includes: a plurality of cascaded filters; each of the filters is connected to the fifth capacitor of each stage of the voltage multiplier circuit.

[0013] In one optional embodiment of this application, the filter includes: a filter capacitor and a filter resistor; one end of the filter capacitor of the first filter is connected to the second end of the fifth capacitor of the first voltage multiplier circuit; the other end of the filter capacitor of the first filter is connected to one end of the filter resistor of the first filter; the other end of the filter resistor of the first filter is connected to the first end of the fifth capacitor of the first voltage multiplier circuit and the second end of the fifth capacitor of the second voltage multiplier circuit, respectively; one end of the filter capacitor of the i-th filter is connected to one end of the filter capacitor and the filter resistor of the (i-1)-th filter, respectively; the other end of the filter capacitor of the i-th filter is connected to one end of the filter resistor of the i-th filter; the other end of the filter resistor of the i-th filter is connected to the first end of the fifth capacitor of the i-th voltage multiplier circuit and the second end of the fifth capacitor of the (i+1)-th voltage multiplier circuit, respectively; i is a positive integer greater than 1.

[0014] In one optional embodiment of this application, the voltage doubler rectifier circuit includes 10 stages of voltage doubler circuits, each stage of which is used to output a DC voltage of 120 volts.

[0015] Compared with existing technologies, the miniature high-voltage module for nuclear radiation detectors provided in this application optimizes the size of the miniature high-voltage module by using a Boost converter chip circuit instead of a transformer for voltage boosting in existing technologies. At the same time, the miniature high-voltage module adds a drive circuit, which provides bidirectional current to the voltage doubler rectifier circuit based on the voltage output from the output terminal of the Boost converter chip circuit. This results in a final output voltage that is significantly higher than that of existing designs, meeting the high current requirements of some special detectors and improving the compatibility between the miniature high-voltage module and nuclear radiation detectors. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 A structural diagram of a miniature high-voltage module for a nuclear radiation detector provided in an embodiment of this application;

[0018] Figure 2 This is a structural diagram of the Boost converter chip circuit provided in the embodiments of this application;

[0019] Figure 3 A structural diagram of the driving circuit provided in the embodiments of this application;

[0020] Figure 4 This is a structural diagram of the voltage doubler rectifier circuit provided in the embodiments of this application;

[0021] Figure 5 This is a structural diagram of the filter circuit provided in an embodiment of this application. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise expressly specified. "Several" means one or more, unless otherwise expressly specified.

[0025] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Nuclear radiation detectors convert physical radiation signals into measurable voltage signals. These detectors require a high bias voltage from the system. Only under an excitation high-voltage electric field can the weak electronic signals generated by the physical radiation signals be amplified and detected by subsequent circuitry.

[0028] In existing technologies, transformers are typically used to step up the voltage and combine them with voltage multiplier rectifiers to generate a high-voltage electric field. However, the high-voltage circuit constructed in this way is large in size, consumes a lot of power, and has a weak driving current capability, which cannot meet the high current requirements of some special detectors.

[0029] This application provides a miniature high-voltage module for nuclear radiation detectors to solve the problems of existing high-voltage circuits being large in size, consuming a lot of power, and having weak driving current capability, which cannot meet the high current requirements of some special detectors.

[0030] Please refer to Figure 1 , Figure 1 This is a structural diagram of a miniature high-voltage module for a nuclear radiation detector provided in an embodiment of this application.

[0031] like Figure 1 As shown, the miniature high-voltage module for the nuclear radiation detector includes: a Boost converter chip circuit 101, a drive circuit 102, and a voltage doubler rectifier circuit 103.

[0032] The Boost boost chip circuit 101 is used to boost the voltage at the input terminal of the Boost boost chip circuit and output the boosted voltage to the drive circuit 102.

[0033] The driving circuit 102 is used to provide bidirectional current to the voltage doubler rectifier circuit 103 based on the voltage output from the output terminal of the Boost boost chip circuit.

[0034] The voltage doubler rectifier circuit 103 is used to amplify the voltage output by the drive circuit 102 and output a target voltage that meets the detection conditions of the nuclear radiation detector.

[0035] In one optional embodiment of this application, in order to remove high-frequency noise and smooth the voltage output, the miniature high-voltage module for the nuclear radiation detector further includes a filter circuit 104.

[0036] Furthermore, to facilitate understanding of the miniature high-voltage module for nuclear radiation detector provided in this application, the following detailed description of the miniature high-voltage module is provided in conjunction with the circuit structure of the Boost boost chip circuit 101, the drive circuit 102, the voltage doubler rectifier circuit 103, and the filter circuit 104.

[0037] For the Boost converter chip circuit 101, please refer to... Figure 2 , Figure 2 This is a structural diagram of the Boost converter chip circuit provided in an embodiment of this application.

[0038] like Figure 2As shown, the Boost converter chip circuit mainly includes: Boost converter chip U1, third inductor L3, isolation diode D3, ninth resistor R9, and tenth resistor R10.

[0039] The Boost converter chip U1 is a DC-DC converter whose main function is to boost a lower input voltage to a higher output voltage.

[0040] In one optional embodiment of this application, the Boost boost chip U1 may be a boost chip of model LT8365 or other models of Boost boost chips. This application does not limit the choice of which model to use.

[0041] Specifically, the Boost converter chip U1 mainly includes: input power supply pin VIN, switch pins SW1 / SW2, and feedback pin FBX;

[0042] The input power pin VIN is connected to the power supply and one end of the third inductor L3, respectively; the switch pins SW1 / SW2 are connected to the other end of the third inductor L3 and the positive terminal of the isolation diode D3, respectively; the negative terminal of the isolation diode D3 is connected to one end of the ninth resistor R9 and the output terminal of the Boost converter chip circuit, respectively.

[0043] The feedback pin FBX is connected to the other end of the ninth resistor R9 and one end of the tenth resistor R10, respectively; the other end of the tenth resistor R10 is grounded to form a voltage feedback circuit between the feedback pin FBX and ground.

[0044] In practical applications, the third inductor L3 acts as a boost energy storage device. When the control circuit of the switch pin SW1 / SW2 is turned on, the power supply voltage is directly applied to the third inductor L3, and the current increases linearly through the third inductor L3, storing energy. When the control circuit of the switch pin SW1 / SW2 is turned off, the current in the third inductor L3 cannot immediately become zero. At this time, the energy in the third inductor L3 is released and superimposed with the input voltage of the power supply, thereby generating an output voltage higher than the input voltage.

[0045] Furthermore, the Boost converter chip also includes a control and protection pin EN / UV, which is connected to one end of a resistor R11. The other end of the resistor R11 is connected to the power supply and one end of the third inductor L3, thereby controlling the operating state of the Boost converter chip circuit and preventing unstable operation or damage caused by low input voltage.

[0046] The input terminal of the Boost converter chip circuit is grounded through capacitor C11, and the output terminal is grounded through capacitor C12. The Boost converter chip also includes a soft-start pin SS, which is grounded through capacitor C8 to reduce the large current surge during the startup of the boost converter chip circuit, prevent output voltage overshoot, and protect the load and power supply circuit.

[0047] The Boost converter chip circuit also includes a compensation pin Vc, which is grounded through resistor R12 and capacitor C9 to improve the stability of the Boost converter chip circuit, reduce output voltage fluctuations, avoid oscillations, and ensure a fast response to transient load changes.

[0048] The Boost converter chip circuit also includes a frequency setting pin RT, which is grounded through resistor R13 and used to adjust the operating frequency of the Boost converter chip circuit.

[0049] The Boost converter chip circuit also includes an internal pin IntVcc, which is grounded through capacitor C10.

[0050] For driver circuit 102, please refer to... Figure 3 , Figure 3 This is a structural diagram of the driving circuit provided in an embodiment of this application.

[0051] like Figure 3 As shown, the driving circuit 102 includes: a first driving sub-circuit 301, a second driving sub-circuit 302, a first capacitor C1, and a second capacitor C2.

[0052] Specifically, the driving circuit has a symmetrical push-pull topology. One end of the first capacitor C1 is connected to the input terminal of the first driving sub-circuit 301, and the other end is connected to the input terminal of the second driving sub-circuit 302 and the output terminal of the Boost converter chip circuit (i.e., the input terminal of the driving circuit 102). The output terminals of the first driving sub-circuit 301 and the second driving sub-circuit 302 are connected to one end of the second capacitor C2. The other end of the second capacitor C2 is connected to the input terminal of the voltage doubler rectifier circuit 103.

[0053] Specifically, the first driving sub-circuit 301 includes: a first resistor R1, a second resistor R2, a first NPN diode Q1, a third capacitor C3, a third resistor R3, a fourth resistor R4, a first PNP diode Q2, and a first inductor L1.

[0054] The base of the first NPN diode Q1 is connected to one end of the first resistor R1, the second resistor R2, and the first capacitor C1, respectively; the collector of the first NPN diode Q1 is connected to the other end of the first resistor R1; and the emitter of the first NPN diode Q1 is connected to the other end of the second resistor R2.

[0055] One end of the third capacitor C3 is connected to the collector of the first NPN diode Q1 and one end of the third resistor R3; the other end of the third capacitor C3 is connected to the emitter of the first NPN diode Q1 and one end of the fourth resistor R4.

[0056] The base of the first PNP diode Q2 is connected to the other end of the fourth resistor R4; the emitter of the first PNP diode Q2 is connected to the other end of the third resistor R3; the collector of the first PNP diode Q2 is connected to one end of the first inductor L1; and the other end of the first inductor L1 is connected to one end of the second capacitor C2.

[0057] The second driving sub-circuit 302 includes: a fifth resistor R5, a sixth resistor R6, a second PNP diode Q3, a fourth capacitor C4, a seventh resistor R7, an eighth resistor R8, a second NPN diode Q4, and a second inductor L2.

[0058] The base of the second PNP diode Q3 is connected to the other end of the fifth resistor R5, the sixth resistor R6, and the first capacitor C1, respectively; the emitter of the second PNP diode Q3 is connected to the other end of the fifth resistor R5; and the collector of the second PNP diode Q3 is connected to the other end of the sixth resistor R6.

[0059] One end of the fourth capacitor C4 is connected to the collector of the second PNP diode Q3 and one end of the seventh resistor R7; the other end of the fourth capacitor C4 is connected to the emitter of the second PNP diode Q3 and one end of the eighth resistor R8.

[0060] The base of the second NPN diode Q4 is connected to the other end of the eighth resistor R8; the emitter of the second NPN diode Q4 is connected to the other end of the seventh resistor R7; the collector of the second NPN diode Q4 is connected to one end of the second inductor L2; and the other end of the second inductor L2 is connected to one end of the second capacitor C2.

[0061] In practical applications, the square wave signal at the input terminal of the input drive circuit 102 is AC coupled to the first NPN diode Q1 through the first capacitor C1 to isolate the influence of the DC bias operating point of the first NPN diode Q1 on the input signal.

[0062] In this embodiment, the first NPN diode Q1 and the second PNP diode Q3 can be regarded as the buffer stage of the driving circuit 102, wherein the first resistor R1 and the second resistor R2 are used to provide DC bias for the first NPN diode Q1; the fifth resistor R5 and the sixth resistor R6 are used to provide DC bias for the second PNP diode Q3.

[0063] The third capacitor C3 and the fourth resistor R4, as well as the fourth capacitor C4 and the eighth resistor R8, can be regarded as two sets of low-pass filters to eliminate pulse spikes and damped square wave oscillations.

[0064] The first PNP diode Q2 and the second NPN diode Q4 can be regarded as the driving stage of the driving circuit 102 to provide excitation pulses and driving circuit for the voltage doubler rectifier circuit 103; wherein, the third resistor R3 and the seventh resistor R7 are the current limiting protection resistors of the first PNP diode Q2 and the second NPN diode Q4, respectively, and the first inductor L1 and the second inductor L2 are the impedance matching inductors of the subsequent stage.

[0065] Furthermore, for the voltage doubler rectifier circuit 103, please refer to... Figure 4 , Figure 4 This is a structural diagram of the voltage doubler rectifier circuit provided in an embodiment of this application.

[0066] like Figure 4 As shown, the voltage multiplier rectifier circuit consists of m cascaded voltage multiplier sub-circuits. Each voltage multiplier sub-circuit is used to amplify the voltage output by the drive circuit 102 step by step, and output a target voltage that meets the detection conditions of the nuclear radiation detector; m is a positive integer.

[0067] Specifically, for voltage multiplier circuits, the circuit structure of each stage of the voltage multiplier circuit is roughly the same, including: first diode D1, second diode D2 and fifth capacitor C5.

[0068] In this circuit, the positive terminal of the first diode D1 is connected to the negative terminal of the second diode D2, the first terminal of the fifth capacitor C5 is connected to the negative terminal of the first diode D1, and the second terminal of the fifth capacitor C5 is connected to the positive terminal of the second diode D2; the i-th node is included between the positive terminal of the first diode D1 and the negative terminal of the second diode D2 in the i-th voltage multiplier circuit 401.

[0069] The first node of the first voltage multiplier circuit is connected to the input terminal of the voltage multiplier rectifier circuit; the cathode of the first diode D1 of the m-th voltage multiplier circuit is connected to the output terminal of the voltage multiplier rectifier circuit.

[0070] The i-th node and the (i+1)-th node of adjacent voltage multiplier circuits are connected by a sixth capacitor C6; the cathode of the first diode D1 of the i-th stage voltage multiplier circuit is connected to the anode of the second diode D2 of the (i+1)-th stage voltage multiplier circuit; the fifth capacitor C5 between adjacent voltage multiplier circuits is connected in series; i is a positive integer greater than 1.

[0071] In one optional embodiment of this application, the voltage multiplier rectifier circuit adopts a 10-stage voltage multiplier, and each stage of the voltage multiplier sub-circuit can output a maximum DC high voltage of 120V; the first diode D1 and the second diode D2 of each stage of the voltage multiplier sub-circuit are unidirectionally turned on when the high voltage pulse is input to charge the fifth capacitor C5. During the half-wave rectification of the high voltage signal, the output voltage of the fifth capacitor C5 of each stage of the voltage multiplier sub-circuit is connected in series, thereby achieving the voltage multiplication function of the entire circuit.

[0072] Furthermore, for filter circuit 104, please refer to... Figure 5 , Figure 5 This is a structural diagram of the filter circuit provided in an embodiment of this application.

[0073] like Figure 5 As shown, the filtering circuit consists of multiple cascaded filters, each of which is connected to the fifth capacitor C5 of each voltage multiplier circuit.

[0074] Specifically, each stage of the filter includes filter capacitor C7 and filter resistor R11.

[0075] Each of the filters is connected to the fifth capacitor C5 of each stage of the voltage multiplier circuit.

[0076] One end of the filter capacitor C7 of the first filter is connected to the second end of the fifth capacitor C5 of the first voltage multiplier circuit; the other end of the filter capacitor C7 of the first filter is connected to one end of the filter resistor R11 of the first filter; the other end of the filter resistor C7 of the first filter is connected to the first end of the fifth capacitor C5 of the first voltage multiplier circuit and the second end of the fifth capacitor C5 of the second voltage multiplier circuit, respectively.

[0077] One end of the filter capacitor of the i-th filter is connected to one end of the filter capacitor C7 and the filter resistor R11 of the (i-1)-th filter, respectively; the other end of the filter capacitor C7 of the i-th filter is connected to one end of the filter resistor R11 of the i-th filter; the other end of the filter resistor R11 of the i-th filter is connected to the first end of the fifth capacitor C7 of the i-th voltage multiplier circuit and the second end of the fifth capacitor C7 of the (i+1)-th voltage multiplier circuit, respectively; i is a positive integer greater than 1.

[0078] In summary, the miniature high-voltage module for nuclear radiation detectors provided in this application optimizes the size of the miniature high-voltage module by using a Boost converter chip circuit instead of the transformer step-up in the prior art. Furthermore, the addition of a drive circuit provides bidirectional current to the voltage doubler rectifier circuit based on the voltage output from the Boost converter chip circuit, resulting in a significantly higher final output voltage than existing designs. This meets the high-current requirements of some special detectors and improves the compatibility between the miniature high-voltage module and the nuclear radiation detector.

[0079] The embodiments of this disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of this disclosure. The scope of this disclosure is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of this disclosure, and all such substitutions and modifications should fall within the scope of this disclosure.

Claims

1. A miniature high-voltage module for a nuclear radiation detector, characterized in that, include: Boost converter chip circuit, driver circuit, voltage doubler rectifier circuit; The input terminal of the Boost boost chip circuit is connected to the power supply, and the output terminal of the Boost boost chip circuit is connected to the driving circuit. The Boost boost chip circuit is used to boost the voltage input to the input terminal of the Boost boost chip circuit and output the boosted voltage to the driving circuit. The driving circuit is used to provide bidirectional current to the voltage doubler rectifier circuit based on the voltage output from the output terminal of the Boost boost chip circuit. The voltage doubler rectifier circuit is used to amplify the voltage output by the drive circuit and output a target voltage that meets the detection conditions of the nuclear radiation detector.

2. The miniature high-voltage module for a nuclear radiation detector according to claim 1, characterized in that, The driving circuit includes: a first driving sub-circuit, a second driving sub-circuit, a first capacitor, and a second capacitor; The first driving sub-circuit and the second driving sub-circuit are in a symmetrical push-pull driving topology; one end of the first capacitor is connected to the input terminal of the first driving sub-circuit, and the other end is connected to the input terminal of the second driving sub-circuit and the output terminal of the Boost converter chip circuit respectively; the output terminals of the first driving sub-circuit and the second driving sub-circuit are connected to one end of the second capacitor; the other end of the second capacitor is connected to the input terminal of the voltage doubler rectifier circuit.

3. The miniature high-voltage module for a nuclear radiation detector according to claim 2, characterized in that, The first driving sub-circuit includes: a first resistor, a second resistor, a first NPN diode, a third capacitor, a third resistor, a fourth resistor, a first PNP diode, and a first inductor; The base of the first NPN diode is connected to one end of the first resistor, the second resistor, and the first capacitor, respectively; the collector of the first NPN diode is connected to the other end of the first resistor; and the emitter of the first NPN diode is connected to the other end of the second resistor. One end of the third capacitor is connected to the collector of the first NPN diode and one end of the third resistor, respectively; the other end of the third capacitor is connected to the emitter of the first NPN diode and one end of the fourth resistor, respectively. The base of the first PNP diode is connected to the other end of the fourth resistor; the emitter of the first PNP diode is connected to the other end of the third resistor; the collector of the first PNP diode is connected to one end of the first inductor; and the other end of the first inductor is connected to one end of the second capacitor. The second driving sub-circuit includes: a fifth resistor, a sixth resistor, a second PNP diode, a fourth capacitor, a seventh resistor, an eighth resistor, a second NPN diode, and a second inductor; The base of the second PNP diode is connected to the other end of the fifth resistor, the sixth resistor, and the first capacitor, respectively; the emitter of the second PNP diode is connected to the other end of the fifth resistor; and the collector of the second PNP diode is connected to the other end of the sixth resistor. One end of the fourth capacitor is connected to the collector of the second PNP diode and one end of the seventh resistor, respectively; the other end of the fourth capacitor is connected to the emitter of the second PNP diode and one end of the eighth resistor, respectively. The base of the second NPN diode is connected to the other end of the eighth resistor; the emitter of the second NPN diode is connected to the other end of the seventh resistor; the collector of the second NPN diode is connected to one end of the second inductor; and the other end of the second inductor is connected to one end of the second capacitor.

4. The miniature high-voltage module for a nuclear radiation detector according to claim 1, characterized in that, The Boost converter chip circuit includes: The Boost converter chip circuit includes: a Boost converter chip, a third inductor, an isolation diode, a ninth resistor, and a tenth resistor; The Boost converter chip includes: an input power supply pin, a switch pin, and a feedback pin; The input power pin is connected to the power supply and one end of the third inductor, respectively; the switch pin is connected to the other end of the third inductor and the positive terminal of the isolation diode, respectively; the negative terminal of the isolation diode is connected to one end of the ninth resistor and the output terminal of the Boost converter chip, respectively. The feedback pin is connected to the other end of the ninth resistor and one end of the tenth resistor, respectively; the other end of the tenth resistor is grounded.

5. The miniature high-voltage module for a nuclear radiation detector according to claim 1, characterized in that, The voltage doubler rectifier circuit includes: m cascaded voltage multiplier circuits, each of which amplifies the voltage output by the drive circuit stage by stage to output a target voltage that meets the detection conditions of the nuclear radiation detector; m is a positive integer.

6. The miniature high-voltage module for a nuclear radiation detector according to claim 5, characterized in that, The voltage multiplier circuit includes: a first diode, a second diode, and a fifth capacitor; The anode of the first diode is connected to the cathode of the second diode, the first terminal of the fifth capacitor is connected to the cathode of the first diode, and the second terminal of the fifth capacitor is connected to the anode of the second diode; wherein, the i-th node is included between the anode of the first diode and the cathode of the second diode in the i-th voltage multiplier circuit. The first node of the first voltage multiplier circuit is connected to the input terminal of the voltage multiplier rectifier circuit; the cathode of the first diode of the m-th voltage multiplier circuit is connected to the output terminal of the voltage multiplier rectifier circuit. The i-th node and the (i+1)-th node of adjacent voltage multiplier circuits are connected by a sixth capacitor; the cathode of the first diode of the i-th stage voltage multiplier circuit is connected to the anode of the second diode of the (i+1)-th stage voltage multiplier circuit; the fifth capacitors of adjacent voltage multiplier circuits are connected in series; i is a positive integer greater than 1.

7. The miniature high-voltage module for a nuclear radiation detector according to claim 5, characterized in that, Also includes: Filtering circuit; The filtering circuit includes: multiple cascaded filters; Each of the filters is connected to the fifth capacitor of each stage of the voltage multiplier circuit.

8. The miniature high-voltage module for a nuclear radiation detector according to claim 7, characterized in that, The filter includes: a filter capacitor and a filter resistor; One end of the filter capacitor of the first filter is connected to the second end of the fifth capacitor of the first voltage multiplier circuit; the other end of the filter capacitor of the first filter is connected to one end of the filter resistor of the first filter; the other end of the filter resistor of the first filter is connected to the first end of the fifth capacitor of the first voltage multiplier circuit and the second end of the fifth capacitor of the second voltage multiplier circuit. One end of the filter capacitor of the i-th filter is connected to one end of the filter capacitor and one end of the filter resistor of the (i-1)-th filter, respectively; the other end of the filter capacitor of the i-th filter is connected to one end of the filter resistor of the i-th filter; the other end of the filter resistor of the i-th filter is connected to the first end of the fifth capacitor of the i-th voltage multiplier circuit and the second end of the fifth capacitor of the (i+1)-th voltage multiplier circuit, respectively; i is a positive integer greater than 1.

9. The miniature high-voltage module for a nuclear radiation detector according to any one of claims 5 to 8, characterized in that, The voltage doubler rectifier circuit includes 10 voltage doubler circuits, each of which is used to output a DC voltage of 120 volts.

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