A laser gyroscope positive glow power supply

Abstract

This invention discloses a positive ignition power supply for a laser gyroscope, comprising a BOOST power module, a primary voltage multiplier module, a multi-stage voltage multiplier module, and a feedback circuit. Each stage of the multi-stage voltage multiplier module includes a first voltage multiplier diode D01, a second voltage multiplier diode D02, and a first voltage multiplier capacitor C01. The primary voltage multiplier module includes a primary voltage multiplier diode and a primary voltage multiplier capacitor. The cathode of the primary voltage multiplier diode and one end of the primary voltage multiplier capacitor are both connected to the first connection terminal of the first-stage voltage multiplier unit, and the other end of the primary voltage multiplier capacitor is connected to ground (GND). The anode of the primary voltage multiplier diode is connected to the output terminal of the BOOST power module. The second connection terminal of the last stage voltage multiplier unit forms the output terminal of the voltage multiplier circuit. This invention can reduce the impact of temperature drift caused by circuit efficiency, ripple voltage output, and the voltage withstand requirements of components.

Description

Technical Field

[0001] This utility model relates to the field of inertial navigation technology, specifically to a laser gyroscope positive ignition power supply. Background Technology

[0002] The laser gyroscope starter power supply is a key component used to start and maintain the operation of a laser gyroscope, a high-precision inertial navigation device widely used in aerospace, military, and industrial fields. The main function of the starter power supply is to provide the high voltage (absolute value greater than 2000V) required for startup to excite the laser medium to generate laser light, and to maintain a stable discharge state during operation.

[0003] Existing technical solutions include flyback switching power supplies composed of L6565 and transformers. However, since the starting power supply is used in applications with higher switching frequencies, and the transformer has greater losses under higher switching frequency conversion, the efficiency of this circuit is not high. However, for high-precision and sensitive sensor devices such as laser gyroscopes, low circuit efficiency will cause a heat source in the working environment of the laser gyroscope, which will affect the temperature drift of the gyroscope and lead to the risk of deterioration of the gyroscope's accuracy. Utility Model Content

[0004] To address the problems in the background technology, this utility model proposes a laser gyroscope positive ignition power supply that can reduce the impact of temperature drift caused by circuit efficiency, ripple voltage output, and the withstand voltage requirements of components.

[0005] The present invention adopts the following technical solution:

[0006] A positive ignition power supply for a laser gyroscope includes: a BOOST power module, a primary voltage multiplier module, a multi-stage voltage multiplier module, and a feedback circuit. The multi-stage voltage multiplier module includes multiple voltage multiplier units. Each voltage multiplier unit includes a first voltage multiplier diode D01, a second voltage multiplier diode D02, and a first voltage multiplier capacitor C01. The anode of the first voltage multiplier diode D01 is connected to one end of the first voltage multiplier capacitor C01, forming a first connection terminal A. The cathode of the second voltage multiplier diode D02 is connected to the other end of the first voltage multiplier capacitor C01, forming a second connection terminal B. The second connection terminal B of the voltage multiplier unit is connected to the first connection terminal A of the next stage voltage multiplier unit. The primary voltage multiplier module includes a primary voltage multiplier diode D19 and a primary voltage multiplier capacitor C14. The cathode of the primary voltage multiplier diode D19 and one end of the primary voltage multiplier capacitor C14 are both connected to the first connection terminal of the first stage voltage multiplier unit. The other end of the primary voltage multiplier capacitor C14 is connected to ground GND. The anode of the primary voltage multiplier diode D19 is connected to the output terminal of the BOOST power module. The second connection terminal of the last stage voltage multiplier unit forms the output terminal of the voltage multiplier circuit.

[0007] The first connection terminal A of the Nth voltage multiplier unit is connected to the input terminal of the feedback circuit, and the output terminal of the feedback circuit is connected to the feedback terminal of the BOOST power module; the number of voltage multiplier units is 4-9.

[0008] Optionally, each voltage multiplier unit further includes a second voltage multiplier capacitor C02. The cathode of the first voltage multiplier diode D01 is connected to the anode of the second voltage multiplier diode D02 to form a third connection terminal C. The second voltage multiplier capacitor C02 of the next voltage multiplier unit is located between the third connection terminal of the next voltage multiplier unit and the third connection terminal of the previous voltage multiplier unit. The second voltage multiplier capacitor C02 of the first voltage multiplier unit is located between the third connection terminal of the first voltage multiplier unit and the output terminal of the BOOST power module.

[0009] Optionally, the power module includes a quasi-resonant chip U1, an inductor L1, and an N-MOS transistor Q1.

[0010] The power supply VIN is connected to one end of capacitor C21, and the other end of capacitor C21 is connected to ground GND. The power supply VIN is connected to pin 1 VIN of quasi-resonant chip U1, and pin 6 GND of quasi-resonant chip U1 is connected to the circuit ground GND.

[0011] The power supply VIN is connected to resistor R4. The other end of resistor R4 is connected to one end of resistor R5. The other end of resistor R5 is connected to ground GND. The connection point of resistors R4 and R5 is connected to pin 7 UVLO of quasi-resonant chip U1.

[0012] Pin 10 (SS) of the quasi-resonant chip U1 is connected to ground (GND) through capacitor C23, and pin 4 (VCC) of the quasi-resonant chip U1 is connected to ground (GND) through capacitor C22.

[0013] Pin 9 (RT) of the quasi-resonant chip U1 is connected to resistor R1, and the other end of resistor R1 is connected to ground (GND); pin 5 (OUTPUT) of the quasi-resonant chip U1 is connected to the gate of N-MOS transistor Q1.

[0014] The power supply VIN is connected to one end of the inductor L1, and the other end of the inductor L1 is connected to the drain of the N-MOS transistor Q1. The connection between the drain of the N-MOS transistor Q1 and the inductor L1 forms the output terminal of the power module. The source of the N-MOS transistor Q1 is connected to one end of the sampling resistor, and the other end of the sampling resistor is connected to ground GND.

[0015] The output of the feedback circuit is connected to pin 2 (FB) of the quasi-resonant chip U1.

[0016] Optionally, it also includes an RC filter circuit, which includes a resistor R9, a capacitor C24 and a resistor R12. The source of the N-MOS transistor Q1 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to one end of the capacitor C24 and one end of the resistor R12, the other end of the capacitor C24 is grounded, and the other end of the resistor R12 is connected to pin 8 CS of the quasi-resonant chip U1.

[0017] Optionally, it also includes a ramp compensation circuit, which includes a capacitor C20, a resistor R7 and a resistor R8. Pin 2 FB of the quasi-resonant chip U1 is connected to one end of the capacitor C20 and one end of the resistor R8. The other end of the capacitor C20 is connected to one end of the resistor R7. The other end of the resistor R7 is connected to pin 3 COMP of the quasi-resonant chip U1. The other end of the resistor R8 is also connected to pin 3 COMP of the quasi-resonant chip U1.

[0018] Optionally, pin 5 OUTPUT of the quasi-resonant chip U1 is connected to the gate of the N-MOS transistor Q1 through resistor R2.

[0019] Optionally, the sampling resistor is a parallel branch consisting of resistors R3 and R6.

[0020] Optionally, the feedback circuit includes resistors R10 and R11. One end of resistor R10 is connected to the first connection terminal of the first-stage voltage multiplier unit, and the other end of resistor R10 is connected to one end of resistor R11 and pin FB of the quasi-resonant chip U1. The other end of resistor R11 is connected to ground GND.

[0021] Optionally, the feedback circuit also includes a resistor R13, one end of which is connected to pin 2 FB of the quasi-resonant chip U1, and the other end of which is connected to the digital-to-analog conversion interface of the main control chip.

[0022] Optionally, the specific model of the quasi-resonant chip U1 is LM5022.

[0023] Optionally, it also includes a BGA package structure, wherein the BOOST power module, the primary voltage multiplier module and the multi-stage voltage multiplier module are packaged in the BGA package structure using SIP technology.

[0024] Compared with the prior art, the advantages of this utility model are:

[0025] This invention relates to a laser gyroscope ignition power supply. It employs a BOOST power module combined with a multiplier circuit to form the ignition power supply for the laser gyroscope. The multiplier output rectifier circuit cleverly utilizes diodes and capacitors for energy storage, thereby achieving a multiplier output. Since no transformer is used in the circuit structure, the BOOST circuit is more efficient than the flyback circuit in applications with higher switching frequencies. Furthermore, the temperature drift caused by the circuit efficiency is significantly lower than that of the flyback circuit, thus ensuring sufficient ignition voltage while maintaining gyroscope accuracy.

[0026] In addition, the BOOST power supply module has a higher switching frequency than the flyback switching power supply module, which allows for the use of a lower inductor value to obtain a larger peak current. This reduces the size of the inductor, which helps to reduce the size of the circuit. At the same time, the increase in switching frequency can improve the charging and discharging efficiency of the capacitor, thereby reducing the ripple voltage output of the circuit.

[0027] Furthermore, due to the addition of a multiplier rectifier circuit, the voltage withstand requirements of components are significantly reduced compared to a single BOOST circuit. For example, capacitors C5, C6, C7, C8, C9, C10, C11, C12, C13, and C14 in the circuit collectively bear the output voltage, meaning that when selecting capacitors, only one-tenth of the output voltage withstand rating needs to be considered. Similarly, the N-MOS transistor Q1 in the circuit also needs to have a voltage withstand rating of one-tenth of the output voltage. Attached Figure Description

[0028] To facilitate understanding of this invention, it will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. These drawings depict only typical embodiments of this invention and should not be considered as limiting the scope of protection of this invention.

[0029] Figure 1 This is a schematic diagram of the circuit structure of the positive ignition power supply for the laser gyroscope in Embodiment 1 of this utility model.

[0030] Figure 2 This is a schematic diagram of the voltage multiplier unit of the positive ignition power supply for the laser gyroscope of this invention.

[0031] Figure 3 This is a schematic diagram of the BOOST power module and voltage multiplier module of the laser gyroscope, which are packaged in SIP.

[0032] Figure 4 This is a schematic diagram of the feedback circuit of the positive ignition power supply for the laser gyroscope of this invention. Detailed Implementation

[0033] The embodiments of the present invention are described below with reference to the accompanying drawings, so that those skilled in the art can better understand and implement the present invention. However, the listed embodiments are not intended to limit the present invention. In the absence of conflict, the following embodiments and the technical features in the embodiments can be combined with each other, wherein the same components are indicated by the same reference numerals.

[0034] like Figure 1 As shown, this embodiment provides a high-voltage power supply for igniting a laser gyroscope, which is more efficient, has lower ripple voltage, and is smaller in size than existing flyback switching power supply circuit solutions.

[0035] The principle of this solution is as follows: Figure 1 As shown, 1 is the BOOST power module, 2 is the voltage multiplier module, and the others are peripheral adjustment circuits. In this embodiment, the BOOST power module and voltage multiplier module are integrated into a single 19.00mm × 25.00mm × 5.62mm module using the latest SIP technology. Figure 3 As shown, this results in better efficiency and a smaller size.

[0036] The LM5022, N-MOS transistor, and diode used in this solution are all bare cores, which are attached to the substrate with conductive adhesive. The pins are bonded using gold wire bonding technology with 1mil diameter gold wire. The bonding method is ultrasonic welding, the printing process is laser printing, and the packaging process is plastic encapsulation. The package type is BGA packaging, with a total of 138 pins and 30 effective pins.

[0037] like Figure 2 As shown, the voltage multiplier module includes a primary voltage multiplier module and a multi-stage voltage multiplier module. The multi-stage voltage multiplier module includes multiple voltage multiplier units. Each voltage multiplier unit includes a first voltage multiplier diode D01, a second voltage multiplier diode D02, a first voltage multiplier capacitor C01, and a second voltage multiplier capacitor C02. The anode of the first voltage multiplier diode D01 is connected to one end of the first voltage multiplier capacitor C01, which is the first connection terminal A. The cathode of the second voltage multiplier diode D02 is connected to the other end of the first voltage multiplier capacitor C01, which is the second connection terminal B. The cathode of the first voltage multiplier diode D01 is connected to the anode of the second voltage multiplier diode D02, which is the third connection terminal C. The second connection terminal B of the previous stage voltage multiplier unit is connected to the first connection terminal A of the next stage voltage multiplier unit. The second voltage multiplier capacitor C02 of the next stage voltage multiplier unit is located between the third connection terminal C of the next stage voltage multiplier unit and the third connection terminal C of the previous stage voltage multiplier unit. The second voltage multiplier capacitor C02 of the first stage voltage multiplier unit is located between the third connection terminal of the first stage voltage multiplier unit and the output terminal of the BOOST power module.

[0038] The primary voltage multiplier module includes a primary voltage multiplier diode D19 and a primary voltage multiplier capacitor C14. The cathode of the primary voltage multiplier diode D19 and one end of the primary voltage multiplier capacitor C14 are both connected to the first connection terminal of the first-stage voltage multiplier unit. The other end of the primary voltage multiplier capacitor C14 is connected to ground GND. The anode of the primary voltage multiplier diode D19 is connected to the output terminal of the BOOST power module. The second connection terminal of the last-stage voltage multiplier unit forms the output terminal of the voltage multiplier circuit.

[0039] This solution uses the LM5022 chip, which can output a PWM rectangular wave with a higher switching frequency fsw, which helps to reduce the size of the circuit and the ripple voltage.

[0040] This solution consists of a quasi-resonant chip LM5022 and its peripheral circuits, an inductor rectifier and filter circuit, a switching transistor enable circuit, and a feedback loop.

[0041] The power supply VIN is connected to one end of capacitor C21, and the other end of capacitor C21 is connected to ground GND. Capacitor C21 is a filter capacitor used to filter the power supply VIN.

[0042] The power supply VIN is connected to pin 1 (VIN) of chip U1 LM5022 to supply power to the chip.

[0043] The power supply VIN is connected to resistor R4, the other end of which is connected to resistor R5. The other end of resistor R5 is connected to ground GND. The connection between resistors R4 and R5 is connected to pin 7 (UVLO) of chip U1 LM5022. Resistors R4 and R5 divide the power supply VIN, which is used to set the voltage value for the chip's UVLO function.

[0044] Pin 10 (SS) of chip U1 LM5022 is connected to ground (GND) through capacitor C23. Pin 10 (SS) is the soft-start switch of the chip. By setting different values ​​of capacitor C23, the startup of chip U1 LM5022 can be controlled.

[0045] The VCC pin of chip U1 LM5022 is connected to ground GND through capacitor C22. The VCC pin is the output terminal of the chip's internal high linearity power supply and must be connected to ground GND through a ceramic capacitor.

[0046] Pin 9 (RT) of chip U1 LM5022 is connected to resistor R1, and the other end of resistor R1 is connected to ground (GND). This is used to adjust the switching frequency (fsw) of the PWM rectangular wave output from pin 5 (OUTPUT) of chip U1 LM5022.

[0047] The OUTPUT pin 5 of chip U1 LM5022 is connected to the gate of N-MOS transistor Q1 through resistor R2, which is used to control the conduction of N-MOS transistor Q1.

[0048] The source of N-MOS transistor Q1 is connected to one end of resistors R3 and R6, and the other end of R3 and R6 is connected to ground (GND). R3 and R6 are connected in parallel. The source of N-MOS transistor Q1 is also connected to one end of resistor R9. The other end of resistor R9 is connected to capacitor C24 and one end of resistor R12. The other end of capacitor C24 is connected to ground (GND). The other end of resistor R12 is connected to pin 8 (CS) of chip U1LM5022. R3 and R6 act as sampling resistors to sample the current flowing through N-MOS transistor Q1. Using two resistors in parallel here increases the current-carrying capacity of the resistors and expands the resistance adjustment range, making it easier to find a resistance value that ensures circuit loop stability during actual debugging. Resistor R9 and capacitor C24 form a low-pass filter to filter out interference spikes generated by the sampling of resistors R3 and R6. The voltage signal across resistors R3 and R6 is input to pin 8 (CS) of the LM5022 via resistor R12, serving as the CS voltage signal input. The CS pin of the LM5022 uses the sampled CS voltage signal to toggle the PWM rectangular wave, thus setting the duty cycle of the PWM rectangular wave. Properly setting the values ​​of resistors R3 and R6 can prevent magnetic saturation of inductor L1.

[0049] The power supply VIN is connected to one end of inductor L1, and the other end of inductor L1 is connected to the drain of N-MOS transistor Q1 and the anode of diode D19. The cathode of diode D19 is connected to one end of capacitor C14, and the other end of capacitor C14 is connected to GND. This constitutes the first stage of the BOOST circuit topology and voltage doubler rectifier circuit. The connection between the cathode of diode D19 and capacitor C14 is the output of the first stage and also the feedback terminal. Utilizing the feedback of the first stage greatly reduces the voltage withstand requirements of the components. The functions of diode D19 are: 1) To separate the positive and negative half-cycles of the AC input using the unidirectional conductivity of the diode, controlling the current direction; 2) To guide the current to charge the capacitor or isolate reverse voltage during a specific half-cycle when it is turned on or off. The function of capacitor C14 is to store charge and maintain voltage stability.

[0050] One end of capacitor C13 is connected to the output of the first stage, and the other end is connected to the cathode of diode D17 and the anode of diode D16. The anode of diode D17 is connected to the cathode of diode D18. One end of capacitor C19 is connected to the anode of diode D17 and the cathode of diode D18, and the other end is connected to the anode of diode D19. The connection between the cathode of diode D17 and capacitor C13 is the output of the second stage. Diodes D17 and D18, and capacitors C13 and C19 constitute the second stage amplification. The function of diode D17 is to conduct during the positive half-cycle of the input, allowing capacitor C19 to charge capacitor C13. The function of diode D18 is to conduct during the negative half-cycle of the input, charging capacitor C19 by superimposing the voltage of capacitor C13 with the input voltage. The function of capacitor C13 is to be charged to the peak input voltage during the positive half-cycle, serving as the "base power supply" for subsequent voltage superposition. During the negative half-cycle, capacitor C19 receives the superposition value of capacitor C13 and the input voltage, which is ultimately used as the superposition value of the output capacitor. Following this pattern, capacitors C1-C19 and diodes D1-D19 form a 10x voltage multiplier rectifier circuit. The connection between capacitor C8 and the cathode of diode D9 is the output terminal of the final stage of the entire 10x voltage multiplier rectifier circuit. Each stage can output up to 300V, with the highest output voltage reaching 3000V. Through feedback circuit control, the output voltage range can be from 1500V to 3000V. The total number of voltage multiplier stages is 5-10, capable of providing ignition voltage for different types of laser gyroscopes.

[0051] Zhengqihui Components Collaborative Working Process: The input voltage is a sine wave with a peak value of Vpeak. The working process alternates between the positive and negative half-cycles of the input voltage. In the first negative half-cycle: Diode D19 conducts, and the input charges capacitor C14 through diode D19, charging C14 to near Vpeak, with the polarity left being positive and right being negative. In the first positive half-cycle: Diode D18 conducts, and capacitor C14 charges capacitor C19 through diode D18. According to Kirchhoff's voltage law, the sum of the voltages of capacitors C14 and C19 is zero. In the second negative half-cycle: Diode D17 conducts, and the input charges capacitor C13 through diode D17, charging it to Vpeak. The two capacitors are connected in series and superimposed, resulting in a total output of 2Vpeak. This process continues, with subsequent capacitors superimposed to form a voltage multiplier of ten.

[0052] The working principle of the BOOST circuit is as follows: In the first cycle of the PWM rectangular wave, when the PWM rectangular wave output from pin 5 (OUTPUT) of chip U1 LM5022 is high, N-MOS transistor Q1 is turned on. The power supply VIN is connected to ground through inductor L1, N-MOS transistor Q1, and parallel resistors R3 and R6. At this time, the power supply VIN charges and stores energy in inductor L1. The parallel resistors R3 and R6 are used to convert the current flowing through inductor L1 into a voltage signal. When the PWM rectangular wave output from pin 5 (OUTPUT) of chip U1 LM5022 is low, N-MOS transistor Q1 is turned off. At this time, the polarity of inductor L1 is reversed. The energy stored in the power supply VIN and inductor L1 charges and stores energy in capacitor C14 through diode D19, forming the first stage output of the voltage doubler rectifier circuit.

[0053] The working principle of the voltage doubler rectifier circuit: In the second cycle of the PWM rectangular wave, when N-MOS transistor Q1 is turned on, the power supply VIN continues to charge inductor L1, while the energy stored in capacitor C14 charges capacitor C19 through diode D18. The circuit loss is small, and it can be considered that almost all the energy stored in capacitor C14 is input to capacitor C19. When N-MOS transistor Q1 is turned off, the energy stored in power supply VIN, inductor L1, and capacitor C19 charges capacitors C13 and C14 through diode D17, forming the second-stage output voltage in the voltage doubler rectifier circuit. The circuit loss is small, and the switching frequency fsw and duty cycle of the PWM rectangular wave do not change, meaning the energy stored across capacitors C14 and C13 is the same. Therefore, the voltage drop across capacitors C14 and C13 after energy storage is 2VOUT. Similarly, the voltage at the connection between the cathode of diode D9 and capacitor C8 is 10VOUT.

[0054] The feedback loop principle of Qihui power supply circuit:

[0055] like Figure 4 As shown, the first-stage output terminal of the Qihui power supply circuit is connected to one end of resistor R10. The other end of resistor R10 is connected to one end of resistors R11 and R13, as well as pin FB of U1 LM5022. The other end of resistor R11 is connected to ground (GND), and resistor R13 is connected to the digital-to-analog converter interface of the laser gyroscope main control chip. By pre-calculating the resistance values ​​of resistors R10, R11, and R13 and adjusting the range of the DAC, the output voltage of the Qihui power supply can be programmed.

[0056] Pin 2 (FB) of chip U1 LM5022 is connected to one end of capacitor C20 and one end of resistor R8. The other end of capacitor C20 is connected to one end of resistor R7. The other end of resistor R7 is connected to pin 3 (COMP) of chip U1 LM5022. The other end of resistor R8 is also connected to pin 3 (COMP) of chip U1 LM5022.

[0057] Resistors R10 and R11 form a voltage divider on the output voltage of the power supply, feeding the divided voltage back to pin 2 (FB) of chip U1LM5022. Pin 2 (FB) is the inverting input of the internal error operational amplifier of chip U1LM5022, while the non-inverting input is fixed at a constant 1.25V. Pin 3 (COMP) of chip U1LM5022 is the output of the internal error operational amplifier of chip U1LM5022. Therefore, resistors R7 and R8, and capacitor C20 constitute the feedback loop of the operational amplifier, together forming the feedback loop of the power supply. When the output voltage changes, the voltage input to pin FB changes, which in turn changes the voltage at pin 3 (COMP) of chip U1LM5022. The voltage at pin 3 (COMP) of chip U1LM5022 is then input to the internal circuitry of chip U1LM5022, which in turn uses the internal control circuitry to adjust the output PWM rectangular wave, thereby stabilizing the output voltage.

[0058] The LM5022 chip has an extremely high switching frequency. The PWM rectangular wave, as shown in the figure, can have its switching frequency adjusted by setting the value of resistor R1. It operates at 1115kHz. A higher switching frequency in a switching power supply results in lower output ripple. This is further explained by the formula for calculating the inductance L: ,

[0059] In the formula Indicates the input voltage. Indicates the conduction time. D represents the peak current, and D represents the duty cycle. This represents the switching frequency, and L represents the inductance. From the formula, we know that under the same input voltage... Under the condition of duty cycle D, maintain the same peak current. If the switching frequency is increased, a larger peak current can be obtained using a lower inductance value, which can reduce the size of the inductor and thus reduce the size of the circuit.

[0060] In other embodiments, each diode in the voltage multiplier module can be composed of two diodes connected in series. The two diodes integrate two functional units into one physical unit, reducing volume, lowering material and manufacturing costs, simplifying design, layout, installation and wiring, sharing heat dissipation, and making the thermal and electrical characteristics more similar.

[0061] The embodiments described above are merely preferred embodiments of this utility model. The terms "in one embodiment," "in another embodiment," "in yet another embodiment," or "in still another embodiment" used in this specification all refer to one or more of the same or different embodiments according to this disclosure. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution should be included within the protection scope of this utility model.

Claims

1. A laser gyro positive start-up power supply, characterized by, include: The system includes a BOOST power module, a primary voltage multiplier module, a multi-stage voltage multiplier module, and a feedback circuit. The multi-stage voltage multiplier module comprises multiple voltage multiplier units. Each voltage multiplier unit includes a first voltage multiplier diode D01, a second voltage multiplier diode D02, and a first voltage multiplier capacitor C01. The anode of the first voltage multiplier diode D01 is connected to one end of the first voltage multiplier capacitor C01 to form a first connection terminal A. The cathode of the second voltage multiplier diode D02 is connected to the other end of the first voltage multiplier capacitor C01 to form a second connection terminal B. The second connection terminal B of the previous voltage multiplier unit is connected to the first connection terminal A of the next voltage multiplier unit. The primary voltage multiplier module includes a primary voltage multiplier diode D19 and a primary voltage multiplier capacitor C14. The cathode of the primary voltage multiplier diode D19 and one end of the primary voltage multiplier capacitor C14 are both connected to the first connection terminal of the first voltage multiplier unit. The other end of the primary voltage multiplier capacitor C14 is connected to ground GND. The anode of the primary voltage multiplier diode D19 is connected to the output terminal of the BOOST power module. The second connection terminal of the last voltage multiplier unit forms the output terminal of the voltage multiplier circuit. The first connection terminal of the Nth voltage multiplier unit is connected to the input terminal of the feedback circuit, and the output terminal of the feedback circuit is connected to the feedback terminal of the BOOST power module. The voltage multiplier unit has 4-9 stages.

2. The laser gyro positive start-up power supply of claim 1, wherein, Each voltage multiplier unit also includes a second voltage multiplier capacitor C02. The cathode of the first voltage multiplier diode D01 is connected to the anode of the second voltage multiplier diode D02 to form a third connection terminal C. The second voltage multiplier capacitor C02 of the next voltage multiplier unit is located between the third connection terminal of the next voltage multiplier unit and the third connection terminal of the previous voltage multiplier unit. The second voltage multiplier capacitor C02 of the first voltage multiplier unit is located between the third connection terminal of the first voltage multiplier unit and the output terminal of the BOOST power module.

3. The laser gyro start-up power supply of claim 2 wherein, The BOOST power module includes a quasi-resonant chip U1, an inductor L1, and an N-MOS transistor Q1. The power supply VIN is connected to one end of capacitor C21, and the other end of capacitor C21 is connected to ground GND. The power supply VIN is connected to pin 1 VIN of quasi-resonant chip U1, and pin 6 GND of quasi-resonant chip U1 is connected to the circuit ground GND. The power supply VIN is connected to resistor R4. The other end of resistor R4 is connected to one end of resistor R5. The other end of resistor R5 is connected to ground GND. The connection point of resistors R4 and R5 is connected to pin 7 UVLO of quasi-resonant chip U1. Pin 10 (SS) of the quasi-resonant chip U1 is connected to ground (GND) through capacitor C23, and pin 4 (VCC) of the quasi-resonant chip U1 is connected to ground (GND) through capacitor C22. Pin 9 (RT) of the quasi-resonant chip U1 is connected to resistor R1, and the other end of resistor R1 is connected to ground (GND); pin 5 (OUTPUT) of the quasi-resonant chip U1 is connected to the gate of N-MOS transistor Q1. The power supply VIN is connected to one end of the inductor L1, and the other end of the inductor L1 is connected to the drain of the N-MOS transistor Q1. The connection between the drain of the N-MOS transistor Q1 and the inductor L1 forms the output terminal of the power module. The source of the N-MOS transistor Q1 is connected to one end of the sampling resistor, and the other end of the sampling resistor is connected to ground GND. The output of the feedback circuit is connected to pin 2 (FB) of the quasi-resonant chip U1.

4. The laser gyroscope positive ignition power supply according to claim 3, characterized in that, It also includes an RC filter circuit, which includes a resistor R9, a capacitor C24 and a resistor R12. The source of the N-MOS transistor Q1 is connected to one end of the resistor R9, the other end of the resistor R9 is connected to one end of the capacitor C24 and one end of the resistor R12, the other end of the capacitor C24 is grounded, and the other end of the resistor R12 is connected to pin 8 CS of the quasi-resonant chip U1.

5. The laser gyroscope positive ignition power supply according to claim 3, characterized in that, It also includes a ramp compensation circuit, which includes capacitor C20, resistor R7 and resistor R8. Pin 2 FB of quasi-resonant chip U1 is connected to one end of capacitor C20 and one end of resistor R8. The other end of capacitor C20 is connected to one end of resistor R7. The other end of resistor R7 is connected to pin 3 COMP of quasi-resonant chip U1. The other end of resistor R8 is also connected to pin 3 COMP of quasi-resonant chip U1.

6. The laser gyroscope positive ignition power supply according to claim 3, characterized in that, Pin 5 OUTPUT of the quasi-resonant chip U1 is connected to the gate of the N-MOS transistor Q1 through resistor R2.

7. The laser gyroscope positive ignition power supply according to claim 3, characterized in that, The feedback circuit includes resistors R10 and R11. One end of resistor R10 is connected to the first connection terminal of the first-stage voltage multiplier unit. The other end of resistor R10 is connected to one end of resistor R11 and pin FB of the quasi-resonant chip U1. The other end of resistor R11 is connected to ground GND.

8. The laser gyroscope positive ignition power supply according to claim 7, characterized in that, The feedback circuit also includes resistor R13. One end of resistor R13 is connected to pin 2 FB of quasi-resonant chip U1, and the other end of resistor R13 is connected to the digital-to-analog conversion interface of the main control chip.

9. The laser gyroscope positive ignition power supply according to claim 3, characterized in that, The specific model of the quasi-resonant chip U1 is LM5022.

10. The laser gyroscope positive ignition power supply according to any one of claims 1-9, characterized in that, It also includes a BGA package structure, in which the BOOST power module, primary voltage multiplier module and multi-stage voltage multiplier module are packaged in the BGA package structure using SIP technology.

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