Laser gyroscope and frequency-stabilized power supply thereof

Abstract

The utility model discloses a laser gyroscope and a frequency-stabilized power supply thereof. The frequency stabilized power supply comprises a BOOST power supply module, a voltage doubling rectifying circuit and a feedback circuit, the voltage doubling rectifying circuit module comprises a primary voltage output module and a secondary voltage output module, and the primary voltage output module comprises a diode D5 and a capacitor C6. The secondary voltage output module comprises a capacitor C3, a diode D3, a diode D4, a resistor R4 and a capacitor C4, the output end of the voltage doubling rectifying circuit comprises a first-stage output end and a second-stage output end, the output end of the BOOST power supply module is connected with the anode of the diode D5 and one end of the capacitor C3, the output end of the voltage doubling rectifying circuit is connected with the input end of the feedback circuit, and the output end of the feedback circuit is connected with the output end of the voltage doubling rectifying circuit. And the output end of the feedback circuit is connected with the feedback end of the BOOST power supply module. The utility model has the advantages that the ripple voltage output of the circuit is reduced, the circuit volume is reduced, and the withstand voltage requirement of the device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser gyroscope technical field, concretely relates to a laser gyroscope and its frequency stabilizing power supply. BACKGROUND

[0002] Laser gyroscope is a kind of angular velocity sensitive device, and laser gyroscope has the advantages of starting rapidly, acceleration insensitivity and good proportional factor linearity, and is widely used in the fields of aviation, aerospace and navigation.

[0003] After normal ignition of laser gyroscope, photoelectric current signal will be output, so that the photoelectric current signal output by laser gyroscope is stable, and the clamping of laser gyroscope needs to be controlled.Combining piezoelectric effect, to realize the control of the clamping inside laser gyroscope, a 0~290V control signal needs to be provided to the clamping of laser gyroscope, and sufficient power supply, i.e., frequency stabilizing power supply, needs to be provided to the control signal.

[0004] The prior art adopts chip UC1843 matched with peripheral circuit to constitute flyback switching power supply as the frequency stabilizing power supply of laser gyroscope, and the switching frequency that can be output by chip UC1843 is small, so that the ripple voltage of circuit is large, which can affect the work of load and lead to the precision reduction of laser gyroscope. UTILITY MODEL CONTENTS

[0005] In view of the problems in the background art, the utility model provides a laser gyroscope frequency stabilizing power supply for reducing the ripple voltage output of circuit, reducing the volume of circuit and lowering the voltage withstand requirement of device, and also correspondingly provides a laser gyroscope with the frequency stabilizing power supply.

[0006] The utility model adopts the following technical solutions:

[0007] A frequency stabilizing power supply of laser gyroscope, comprising BOOST power module, voltage doubler rectifier circuit and feedback circuit, the voltage doubler rectifier circuit module comprises primary voltage output module and secondary voltage output module,

[0008] The primary voltage output module comprises diode D5 and capacitor C6, the secondary voltage output module comprises capacitor C3, diode D3, diode D4, resistor R4 and capacitor C4, the output end of voltage doubler rectifier circuit comprises first stage output end and second stage output end,

[0009] The cathode of the diode D5 is connected with one end of the capacitor C6 and one end of the resistor R4, the other end of the capacitor C6 is connected with the ground GND, and the other end of the resistor R4 is connected with the anode of the diode D4;

[0010] The output end of the BOOST power module is connected with the anode of the diode D5 and one end of the capacitor C3, the other end of the capacitor C3 is connected with the cathode of the diode D4, and the cathode of the diode D5 and the connection end of the capacitor C6 form the first-stage output end;

[0011] The cathode of the diode D4 is also connected with the anode of the diode D3, the cathode of the diode D3 is connected with one end of the capacitor C4, the other end of the capacitor C4 is connected with the cathode of the diode D5, and the cathode of the diode D3 and the connection end of the capacitor C4 form the second-stage output end; the output end of the voltage doubling rectifier circuit is connected with the input end of the feedback circuit, and the output end of the feedback circuit is connected with the feedback end of the BOOST power module.

[0012] Preferably, the voltage doubling rectifier circuit module further comprises a third-stage voltage output module, the third-stage voltage output module comprises a capacitor C1, a diode D1, a diode D2, a resistor R3 and a capacitor C2, and the output end of the voltage doubling rectifier circuit further comprises a third-stage output end,

[0013] One end of the capacitor C1 is connected with the cathode of the diode D4, the other end of the capacitor C1 is connected with the cathode of the diode D2 and the anode of the diode D1, one end of the resistor R3 is connected with the cathode of the diode D3, the other end of the resistor R3 is connected with the anode of the diode D2, the cathode of the diode D1 is connected with one end of the capacitor C2, and the cathode of the diode D1 and the connection end of the capacitor C2 form the third-stage output end.

[0014] Preferably, the power module comprises a quasi-resonant chip U1, an inductor L1, an N-MOS tube Q1,

[0015] The power supply VIN is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the ground GND, the power supply VIN is connected with the 1-pin VIN of the quasi-resonant chip U1, and the 6-pin GND of the quasi-resonant chip U1 is connected with the ground GND of the circuit;

[0016] The power supply VIN is connected with the resistor R8, the other end of the resistor R8 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the ground GND, and the connection end of the resistors R8 and R9 is connected with the 7-pin UVLO of the quasi-resonant chip U1;

[0017] The 10-pin SS of the quasi-resonant chip U1 is connected with the ground GND through the capacitor C8, and the 4-pin VCC of the quasi-resonant chip U1 is connected with the ground GND through the capacitor C7;

[0018] The 9-pin RT of the quasi-resonant chip U1 is connected with a resistor R5, and the other end of the resistor R5 is connected with the ground GND; the 5-pin OUTPUT of the quasi-resonant chip U1 is connected with the gate of the N-MOS tube Q1;

[0019] The power supply VIN is connected with one end of an inductor L1, the other end of the inductor L1 is connected with the drain of the N-MOS tube Q1, and the drain of the N-MOS tube Q1 is also connected with the anode of a diode D5; the connection end of the drain of the N-MOS tube Q1 and the inductor L1 forms the output end of the power module; the source of the N-MOS tube Q1 is connected with one end of a sampling resistor, and the other end of the sampling resistor is connected with the ground GND,

[0020] The source of the N-MOS tube Q1 is also connected with one end of a resistor R11, the other end of the resistor R11 is connected with one end of a capacitor C10 and one end of a resistor R14, the other end of the capacitor C10 is grounded, and the other end of the resistor R14 is connected with the 8-pin CS of the quasi-resonant chip U1; the output end of the feedback circuit is connected with the 2-pin FB of the quasi-resonant chip U1, and the 2-pin FB of the quasi-resonant chip U1 is also connected with one end of a capacitor C9 and one end of a resistor R13, the other end of the capacitor C9 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with the 3-pin COMP of the quasi-resonant chip U1, and the other end of the resistor R13 is also connected with the 3-pin COMP of the quasi-resonant chip U1.

[0021] Preferably, the 5-pin OUTPUT of the quasi-resonant chip U1 is connected with the gate of the N-MOS tube Q1 through a resistor R6.

[0022] Preferably, the sampling resistor is a parallel branch composed of a resistor R7 and a resistor R10.

[0023] Preferably, the feedback circuit comprises a resistor R1 and a resistor R2, the output end of the voltage doubling rectifier circuit is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the resistor R2 and the 2-pin FB of the quasi-resonant chip U1, and the other end of the resistor R2 is connected with the ground GND.

[0024] Preferably, the specific model of the quasi-resonant chip U1 is LM5022.

[0025] As a general inventive concept, the utility model also provides a laser gyroscope, the laser gyroscope includes the frequency stabilization power supply.

[0026] Compared with the prior art, the utility model has the advantages that:

[0027] The utility model discloses a BOOST power module doubles voltage circuit and feedback circuit constitute the frequency stabilization power supply of laser gyroscope, and BOOST power module is greater than the switching frequency of flyback switching power module module, thereby can use lower inductance value to obtain greater peak current, and the volume of inductance can reduce, and it is favorable to reduce the volume of circuit occupied, and the increase of switching frequency will reduce the ripple voltage output of circuit.

[0028] And, on the basis of BOOST circuit, increase voltage rectifier circuit again, can make the voltage withstand requirement of relevant device in BOOST circuit reduce, to adapt laser gyroscope frequency stabilization power supply output voltage requirement. DRAWINGS

[0029] In order to more easily understand the utility model, the utility model will be described in more detail by referring to the specific embodiments shown in the drawings. These drawings only depict typical embodiments of the utility model and should not be considered as limiting the scope of protection of the utility model.

[0030] Figure 1 It is the circuit structure diagram of laser gyroscope frequency stabilization power supply of the utility model embodiment. SPECIFIC EMBODIMENT

[0031] The embodiments of the utility model are described below with reference to the drawings, so that the person skilled in the art can better understand the utility model and can be implemented, but the listed embodiments are not as the limitation of the utility model, and the following embodiments and technical features in the embodiments can be combined mutually without conflict, wherein the same parts are indicated with the same figure mark.

[0032] The embodiment provides a switching power supply for laser gyroscope frequency stabilization drive power supply, that is, laser gyroscope frequency stabilization power supply, including BOOST power module, voltage doubling rectifier circuit and feedback circuit.

[0033] Among them, BOOST power module includes quasi-resonant chip U1, inductance L1, N-MOS tube Q1, and quasi-resonant chip U1 is specifically type for chip LM5022. Voltage doubling rectifier circuit module includes primary voltage output module, secondary voltage output module and tertiary voltage output module, and primary voltage output module includes diode D5 and capacitor C6, secondary voltage output module includes capacitor C3, diode D3, diode D4, resistor R4 and capacitor C4, and tertiary voltage output module includes capacitor C1, diode D1, diode D2, resistor R3 and capacitor C2.

[0034] The power supply VIN is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the ground GND, and the capacitor C5 is a filter capacitor, used for filtering the power supply VIN.

[0035] The power supply VIN is connected with the pin 1 VIN of the chip U1 LM5022, which is used to supply power for the chip.

[0036] The pin 6 GND of the chip U1 LM5022 is connected with the ground GND of the circuit.

[0037] The power supply VIN is connected with the resistor R8, the other end of the resistor R8 is connected with the resistor R9, the other end of the resistor R9 is connected with the ground GND, and the connection between the resistors R8 and R9 is connected with the pin 7 UVLO of the chip U1 LM5022. The power supply VIN is divided by the resistors R8 and R9, which is used to set the voltage value for the UVLO function of the chip.

[0038] The pin 10 SS of the chip U1 LM5022 is connected with the ground GND through the capacitor C8, and the pin 10 SS is the soft start switch of the chip. By setting different capacitance values of the capacitor C8, the start of the chip U1 LM5022 can be controlled.

[0039] The pin 4 VCC of the chip U1 LM5022 is connected with the ground GND through the capacitor C7, and the pin 4 VCC is the output end of the high linearity power supply inside the chip, which needs to be connected with the ground GND through a ceramic capacitor.

[0040] The pin 9 RT of the chip U1 LM5022 is connected with the resistor R5, and the other end of the resistor R5 is connected with the ground GND. The switching frequency fsw of the PWM rectangular wave output by the pin 5 OUTPUT of the chip U1 LM5022 can be adjusted by adjusting the resistance value of R5.

[0041] The pin 5 OUTPUT of the chip U1 LM5022 is connected with the gate of the N-MOS tube Q1 through the resistor R6, which is used to control the conduction of the N-MOS tube Q1.

[0042] The power supply VIN is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the drain of the N-MOS tube Q1, the drain of the N-MOS tube Q1 is connected with the anode of the diode D5 and one end of the capacitor C3, the other end of the capacitor C3 is connected with the cathode of the diode D4. The cathode of the diode D5 is connected with one end of the capacitor C6 and one end of the resistor R4, the other end of the capacitor C6 is connected with the ground GND, and the other end of the resistor R4 is connected with the anode of the diode D4. Thus, the BOOST circuit topology and the first stage of the voltage doubling rectifier circuit are formed, and the connection end of the cathode of the diode D5 and the capacitor C6 is the output end of the first stage of the voltage doubling rectifier circuit.

[0043] The cathode of diode D4 is also connected to the anode of diode D3 and one end of capacitor C1, the other end of capacitor C1 is connected to the cathode of diode D2, the cathode of diode D3 is connected to one end of resistor R3 and one end of capacitor C4, the other end of resistor R3 is connected to the anode of diode D2, and the other end of capacitor C4 is connected to the cathode of diode D5. Thus, the second stage of the voltage doubler rectifier circuit is formed, and the connection end of the cathode of diode D3 and capacitor C4 is the second stage output end of the voltage doubler rectifier circuit.

[0044] The cathode of diode D2 is also connected to the anode of diode D1, the cathode of diode D1 is connected to one end of capacitor C2 and one end of resistor R1, which is the third stage output end of the voltage doubler rectifier circuit and is used as the voltage output end of the frequency stabilizing power supply in this embodiment. The other end of capacitor C2 is connected to the cathode of diode D3.

[0045] The working principles of the BOOST circuit and the voltage doubler rectifier circuit are as follows:

[0046] In the first period of the PWM rectangular wave, when the PWM rectangular wave output by the 5th pin OUTPUT of chip U1 LM5022 is at high level, N-MOS tube Q1 is turned on, the power supply VIN passes through inductor L1, N-MOS tube Q1, and parallel resistors R7 and R10 to the ground, at this time, the power supply VIN charges and stores energy in inductor L1. The parallel resistors R7 and R10 are used to convert the current flowing through inductor L1 into a voltage signal. When the PWM rectangular wave output by the 5th pin OUTPUT of chip U1 LM5022 is at low level, N-MOS tube Q1 is turned off, according to the Lenz law, at this time, the power supply VIN and the energy stored in inductor L1 will charge and store energy in capacitor C6 through diode D5, forming the first stage output voltage of the voltage doubler rectifier circuit. For convenience of description, it is assumed that the voltage drop across capacitor C6 after storing energy is VOUT.

[0047] In the second period of the PWM rectangular wave, when N-MOS tube Q1 is turned on, the power supply VIN continues to charge and store energy in inductor L1, at the same time, the energy stored in capacitor C6 will charge and store energy in capacitor C3 through resistor R4 and diode D4, the loss in the circuit is small, and the energy stored in capacitor C6 can be considered as almost all input to capacitor C3. When N-MOS tube Q1 is turned off, the power supply VIN and the energy stored in inductor L1, as well as the energy stored in capacitor C3, will charge and store energy in capacitors C4 and C6 through diode D3, forming the second stage output voltage of the voltage doubler rectifier circuit. The loss in the circuit is small, and the switching frequency fsw and the duty cycle of the PWM rectangular wave do not change, that is, the energy stored in capacitors C4 and C6 is the same, so the voltage drop across capacitors C4 and C6 after storing energy is 2VOUT.

[0048] In the third period of the PWM rectangular wave, similarly, when the N-MOS tube Q1 is turned on, the power supply VIN continues to charge the inductor L1, and the energy stored in the capacitors C6 and C4 charges the capacitors C1 and C3 through the resistor R3 and the diode D2. When the N-MOS tube Q1 is turned off, the power supply VIN and the energy stored in the inductor L1, and the energy stored in the capacitors C1 and C3 charge the capacitors C2, C4 and C6 through the diode D1, forming the third output voltage 3VOUT of the voltage doubler rectifier circuit, which is used as the output voltage of the frequency stabilizing power supply.

[0049] The use of the voltage doubler rectifier circuit is beneficial to reduce the voltage specification requirement of the component selection. The output voltage of the frequency stabilizing power supply can actually not use the voltage doubler rectifier circuit, and can directly achieve the required output voltage through the BOOST circuit. However, this will cause the N-MOS tube Q1 and the inductor L1 to need to withstand a larger voltage. In this scheme, a three-voltage voltage doubler rectifier circuit is used, and the voltage specification of the N-MOS tube Q1 and the inductor L1 is considered VOUT. If the voltage doubler rectifier circuit is not used, the voltage specification of the N-MOS tube Q1 and the inductor L1 needs to consider 3VOUT. Therefore, the voltage specification of the component is reduced through the voltage doubler rectifier circuit.

[0050] The use of the voltage doubler rectifier circuit is beneficial to improve the efficiency of the circuit. Using a three-voltage voltage doubler rectifier circuit, the maximum value of the drain voltage of the N-MOS tube Q1 is about (VIN+VOUT). If the three-voltage voltage doubler rectifier circuit is not used, the maximum value of the drain voltage of the N-MOS tube Q1 is about (VIN+3VOUT). Since the source voltage of the N-MOS tube Q1 is controlled by the 8-pin CS of the chip U1 LM5022. Therefore, the drain-source voltage (Vds) of the N-MOS tube Q1 without using the three-voltage voltage doubler rectifier circuit is greater than that of using the voltage doubler rectifier circuit. The current flowing through the N-MOS tube Q1 is unchanged, so the smaller drain-source voltage (Vds) of the N-MOS tube Q1 will make the switching loss of the N-MOS tube lower and the circuit efficiency higher.

[0051] The feedback loop of the frequency stabilizing power supply is described as follows:

[0052] The output end of the constant current power supply is connected to one end of the resistor R1, the other end of R1 is connected to one end of the resistor R2 and the 2-pin FB of the chip U1 LM5022, and the other end of the resistor R2 is connected to the ground GND.

[0053] The 2-pin FB of the chip U1 LM5022 is connected with one end of the capacitor C9 and one end of the resistor R13, the other end of the capacitor C9 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the 3-pin COMP of the chip U1 LM5022, and the other end of the resistor R13 is also connected with the 3-pin COMP of the chip U1 LM5022.

[0054] The resistors R1 and R2 form a voltage divider for the output voltage of the frequency stabilizing power supply, and the divided voltage is fed back to the 2-pin FB of the chip U1 LM5022, the 2-pin FB being the inverting input terminal of the error operational amplifier inside the chip U1 LM5022, and the non-inverting input terminal being fixedly inputted with a constant 1.25V. The 3-pin COMP of the chip U1 LM5022 is the output terminal of the error operational amplifier inside the chip U1 LM5022. Therefore, the resistors R12 and R13 and the capacitor C9 constitute a feedback loop of the operational amplifier, and together constitute a feedback loop of the frequency stabilizing power supply. When the output voltage changes, the voltage inputted to the FB pin changes, and then the voltage of the 3-pin COMP of the chip U1 LM5022 changes. The voltage of the 3-pin COMP of the chip U1 LM5022 is inputted into the chip U1 LM5022, and then the output PWM rectangular wave is adjusted and fed back through the control circuit inside the chip, so as to stably control the output voltage.

[0055] That is, by adjusting the resistance values of the resistors R1 and R2, the output voltage can be set. In order to stabilize the circuit, the values of the resistors R12, R13 and the capacitor C9 can be set.

[0056] The source of the N-MOS transistor Q1 is connected with one end of the resistors R7 and R10, and the other end of the resistors R7 and R10 is connected with the ground GND, that is, the resistors R7 and R10 are connected in parallel. The source of the N-MOS transistor Q1 is also connected with one end of the resistor R11, and the other end of the resistor R11 is connected with one end of the capacitor C10 and one end of the resistor R14, the other end of the capacitor C10 is connected with the ground GND, and the resistor R11 and the capacitor C10 constitute a low-pass filter. The other end of the resistor R14 is connected with the 8-pin CS of the chip U1 LM5022. According to the specification book of the chip U1 LM5022, the CS pin sets a reference voltage, when the input voltage is greater than the reference voltage, the 5-pin OUTPUT of the chip U1 LM5022 outputs low level, so as to control the N-MOS transistor Q1 to be turned off. The working principle of this part of the circuit is as follows:

[0057] When the 5-pin OUTPUT of the chip U1 LM5022 outputs high level, the N-MOS tube Q1 is turned on. The power supply VIN passes through the inductor L1, the N-MOS tube Q1, thereby forming a voltage drop across the resistors R7 and R10. Due to the law of Lenz ("come to refuse to stay"), the voltage waveform formed across the resistors R7 and R10 is a triangular wave. The triangular wave formed across the resistors R7 and R10 passes through the low-pass filter formed by R11 and C10, and is input to the 8-pin CS of the chip U1 LM5022 through the resistor R14. When the triangular wave voltage formed across the resistors R7 and R10 rises to the reference voltage set at the 8-pin CS of the chip U1 LM5022, the 5-pin OUTPUT of the chip U1 LM5022 outputs low level, thereby controlling the N-MOS tube Q1 to be turned off.

[0058] By setting different resistance values of the resistors R7 and R10, different currents required to reach the reference voltage set at the 8-pin CS of the chip U1 LM5022 and the time to reach the reference voltage set at the CS can be achieved. Therefore, the conduction time of the N-MOS tube Q1 can be controlled, that is, the duty cycle of the PWM rectangular wave can be controlled, thereby achieving the control of the output power of the circuit.

[0059] The utility model discloses a BOOST circuit doubling voltage circuit formed by chip LM5022 constitutes the frequency stabilization power supply of laser gyroscope, and the switching frequency that chip LM5022 can output is greater than the switching frequency that the chip UC1843 used by the existing flyback switching power supply can output, and higher switching frequency can make the ripple voltage of circuit smaller. Since the output voltage of the frequency stabilization power supply is higher, the utility model adds a voltage doubling rectifier circuit on the basis of the BOOST circuit, which can reduce the voltage withstand requirement of the device.

[0060] The chip LM5022 has a PWM rectangular wave with an extremely high output switching frequency f SW , and by setting the resistance value of the resistor R5 in the peripheral circuit of the chip, the switching frequency f SW can work at 1115KHz at most. The higher the switching frequency of the switching power supply during operation, the smaller the output ripple can be. At the same time, the calculation formula of the inductor L is as follows:

[0061]

[0062] In the formula, V dc represents the input voltage, T ON represents the conduction time, I P represents the peak current, D represents the duty cycle, f SW represents the switching frequency, and L represents the inductance. According to the formula, under the same input voltage V dc and duty cycle D, the same peak current IP If the switching frequency is increased, a lower inductance value can be used to obtain a larger peak current, so that the volume of the inductor can be reduced, which is beneficial to reduce the volume occupied by the circuit. At the same time, the increase of the switching frequency can reduce the ripple voltage output of the circuit. On the basis of the BOOST circuit, the voltage doubling rectifier circuit is further added, so that the voltage withstanding requirement of the device can be reduced, and smaller voltage withstanding performance devices can be selected when selecting components. In summary, compared with the flyback switching power supply circuit used in the existing jitter power supply, the switching frequency output by the chip LM5022 is higher, so that the volume of the inductor used in the BOOST circuit built by the chip LM5022 can be reduced, thereby reducing the volume of the circuit. At the same time, because of the increase of the switching frequency, the ripple of the output power supply is reduced. At the same time, because the voltage doubling rectifier circuit is added, compared with only the BOOST circuit, the voltage withstanding requirement of the component is reduced. For example, the capacitors C2, C4 and C6 in the circuit jointly bear the output voltage, so that when selecting the capacitors C2, C4 and C6, only one third of the output voltage withstand voltage needs to be considered. Similarly, the N-MOS tube Q1 in the circuit also needs to consider one third of the output voltage withstand voltage.

[0063] The above-described embodiments are only the preferred specific embodiments of the present application, and the phrase "in an embodiment", "in another embodiment", "in still another embodiment" or "in other embodiments" in the specification can refer to one or more of the same or different embodiments according to the present disclosure. The usual changes and replacements made by those skilled in the art within the technical scheme of the present application should be included in the protection scope of the present application.

Claims

1. A frequency stabilizing power supply for a laser gyroscope, characterized in that, The BOOST power module, the voltage doubling rectifier circuit and the feedback circuit are included, the voltage doubling rectifier circuit module includes a first voltage output module and a second voltage output module, The first voltage output module includes a diode D5 and a capacitor C6, the second voltage output module includes a capacitor C3, a diode D3, a diode D4, a resistor R4 and a capacitor C4, the output end of the voltage doubling rectifier circuit includes a first output end and a second output end, The cathode of the diode D5 is connected with one end of the capacitor C6 and one end of the resistor R4, the other end of the capacitor C6 is connected with the ground GND, and the other end of the resistor R4 is connected with the anode of the diode D4; The output end of the BOOST power module is connected with the anode of the diode D5 and one end of the capacitor C3, the other end of the capacitor C3 is connected with the cathode of the diode D4; the cathode of the diode D5 and the connection end of the capacitor C6 form the first output end; The cathode of the diode D4 is also connected with the anode of the diode D3, the cathode of the diode D3 is connected with one end of the capacitor C4, the other end of the capacitor C4 is connected with the cathode of the diode D5, and the cathode of the diode D3 and the connection end of the capacitor C4 form the second output end; the output end of the voltage doubling rectifier circuit is connected with the input end of the feedback circuit, and the output end of the feedback circuit is connected with the feedback end of the BOOST power module.

2. The frequency stabilizing power supply for a laser gyro according to claim 1, characterized in that, The voltage doubling rectifier circuit module further includes a third voltage output module, the third voltage output module includes a capacitor C1, a diode D1, a diode D2, a resistor R3 and a capacitor C2, and the output end of the voltage doubling rectifier circuit further includes a third output end, One end of the capacitor C1 is connected with the cathode of the diode D4, the other end of the capacitor C1 is connected with the cathode of the diode D2 and the anode of the diode D1, one end of the resistor R3 is connected with the cathode of the diode D3, the other end of the resistor R3 is connected with the anode of the diode D2, the cathode of the diode D1 is connected with one end of the capacitor C2, and the cathode of the diode D1 and the connection end of the capacitor C2 form the third output end.

3. The frequency stabilizing power supply for a laser gyro according to claim 1 or 2, characterized in that, The power module includes a quasi-resonant chip U1, an inductor L1 and an N-MOS tube Q1, The power supply VIN is connected with one end of the capacitor C5, the other end of the capacitor C5 is connected with the ground GND, the power supply VIN is connected with the 1 pin VIN of the quasi-resonant chip U1, and the 6 pin GND of the quasi-resonant chip U1 is connected with the ground GND of the circuit; The power supply VIN is connected with the resistor R8, the other end of the resistor R8 is connected with one end of the resistor R9, the other end of the resistor R9 is connected with the ground GND, and the connection part of the resistors R8 and R9 is connected with the 7 pin UVLO of the quasi-resonant chip U1; The 10 pin SS of the quasi-resonant chip U1 is connected with the ground GND through the capacitor C8, and the 4 pin VCC of the quasi-resonant chip U1 is connected with the ground GND through the capacitor C7; The 9 pin RT of the quasi-resonant chip U1 is connected with the resistor R5, the other end of the resistor R5 is connected with the ground GND; and the 5 pin OUTPUT of the quasi-resonant chip U1 is connected with the gate of the N-MOS tube Q1; The power supply VIN is connected with one end of the inductor L1, the other end of the inductor L1 is connected with the drain of the N-MOS tube Q1, the drain of the N-MOS tube Q1 is also connected with the anode of the diode D5; the connection end of the drain of the N-MOS tube Q1 and the inductor L1 forms the output end of the power module; the source of the N-MOS tube Q1 is connected with one end of the sampling resistor, the other end of the sampling resistor is connected with the ground GND, The source of the N-MOS tube Q1 is also connected with one end of the resistor R11, the other end of the resistor R11 is connected with one end of the capacitor C10 and one end of the resistor R14, the other end of the capacitor C10 is grounded, the other end of the resistor R14 is connected with the 8-pin CS of the quasi-resonant chip U1; the output end of the feedback circuit is connected with the 2-pin FB of the quasi-resonant chip U1, the 2-pin FB of the quasi-resonant chip U1 is also connected with one end of the capacitor C9 and one end of the resistor R13, the other end of the capacitor C9 is connected with one end of the resistor R12, the other end of the resistor R12 is connected with the 3-pin COMP of the quasi-resonant chip U1, the other end of the resistor R13 is also connected with the 3-pin COMP of the quasi-resonant chip U1.

4. The frequency stabilizing power supply for a laser gyro according to claim 3, characterized in that, The 5-pin OUTPUT of the quasi-resonant chip U1 is connected with the gate of the N-MOS tube Q1 through the resistor R6.

5. The frequency stabilizing power supply for a laser gyro according to claim 3, characterized in that, The sampling resistor is a parallel branch composed of the resistor R7 and the resistor R10.

6. The frequency stabilizing power supply for a laser gyro according to claim 3, characterized in that, The feedback circuit includes the resistor R1 and the resistor R2, the output end of the voltage doubling rectifier circuit is connected with one end of the resistor R1, the other end of the resistor R1 is connected with one end of the resistor R2 and the 2-pin FB of the quasi-resonant chip U1, the other end of the resistor R2 is connected with the ground GND.

7. The frequency stabilizing power supply for a laser gyro according to claim 3, characterized in that, The specific model of the quasi-resonant chip U1 is LM5022.

8. A laser gyro, characterized by, The laser gyro comprises the frequency stabilization power supply according to any one of claims 1-7. The laser gyro comprises the frequency stabilization power supply according to any one of claims 1-7.

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