Laser gyroscope and dithering power supply thereof

Abstract

The utility model discloses a laser gyro and dithering power supply thereof, dithering power supply includes BOOST power supply module, positive and negative output rectification circuit and feedback circuit, positive and negative output rectification circuit includes positive voltage output module and negative voltage output module, positive voltage output module includes resistor R1, diode D2, diode D1 and capacitor C4, and negative voltage output module includes resistor R1, diode D2, diode D1 and capacitor C4. The negative voltage output module comprises a capacitor C3, a diode D3, a resistor R8, a diode D4 and a capacitor C6. The jitter power supply of the laser gyroscope is formed by the BOOST power supply module, the positive and negative output rectification circuit and the feedback circuit, and the BOOST power supply module has higher switching frequency than a Royal circuit, so that a higher peak current can be obtained by using a lower inductance value, the volume of an inductor can be reduced, the volume occupied by the circuit is reduced, and meanwhile, the switching frequency is increased, so that the power consumption of the laser gyroscope is reduced. And the ripple voltage output of the circuit can be reduced, so that the precision of the laser gyroscope is improved.

Description

Technical Field

[0001] This utility model relates to the field of laser gyroscope technology, specifically to a laser gyroscope and its jitter power supply. Background Technology

[0002] A laser gyroscope is an angular velocity-sensitive device. It has the advantages of rapid start-up, insensitivity to acceleration, and good linearity of the scaling factor, and is widely used in the fields of aviation, aerospace, and navigation.

[0003] Laser gyroscopes have a locked region, which can lead to a decrease in their accuracy. To solve this problem, the laser gyroscope needs to be made to jitter randomly. The solution used in the circuit is to output a sine wave with added noise as the jitter driver for the gyroscope. The amplitude of this sine wave usually varies within 65V, so a jitter power supply of ±65V is needed to ensure the power supply for the jitter driver.

[0004] Existing dithering power supplies employ Royal circuits. However, this approach suffers from current spikes during both turn-off and turn-on, resulting in low efficiency. For high-precision, sensitive sensors like laser gyroscopes, this inefficiency can create a heat source in the gyroscope's operating environment, affecting temperature drift and potentially degrading accuracy. Furthermore, the large current spikes and high collector voltages during turn-off can easily damage the switching transistor. Another option is a flyback power supply, but this lacks a feedback loop in the -65V output circuit, leading to extremely high output ripple. This can negatively impact the load and reduce the laser gyroscope's accuracy. Utility Model Content

[0005] To address the problems in the background art, this utility model proposes a jitter power supply that reduces the ripple voltage output of the circuit and improves the accuracy of the laser gyroscope, as well as a laser gyroscope having the jitter power supply.

[0006] The present invention adopts the following technical solution:

[0007] A laser gyroscope jitter power supply includes a BOOST power module, positive and negative output rectifier circuits, and a feedback circuit. The positive and negative output rectifier circuits include a positive voltage output module and a negative voltage output module. The positive voltage output module includes a resistor R1, a diode D2, a diode D1, and a capacitor C4. The negative voltage output module includes a capacitor C3, a diode D3, a resistor R8, a diode D4, and a capacitor C6.

[0008] The output terminal of the BOOST power module is connected to the anode of diode D1 and one end of resistor R1. The cathode of diode D1 is connected to one end of capacitor C4. The connection between diode D1 and capacitor C4 is the positive voltage output terminal of the jitter power supply. The other end of capacitor C4 is connected to ground GND. The other end of resistor R1 is connected to the cathode of diode D2. The anode of diode D2 is connected to ground. The output terminal of the BOOST power module is also connected to one end of capacitor C3. The other end of capacitor C3 is connected to the cathode of diode D4 and one end of resistor R8. The anode of diode D4 is connected to one end of capacitor C6. The connection between diode D4 and capacitor C6 is the negative voltage output terminal of the jitter power supply. The other end of capacitor C6 is connected to ground GND. The other end of resistor R8 is connected to the anode of diode D3. The cathode of diode D3 is connected to ground.

[0009] The positive voltage output terminal of the jitter power supply and the negative voltage output terminal of the feedback circuit are both 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.

[0010] Preferably, the positive voltage output module further includes a capacitor C1, one end of which is connected to the output terminal of the BOOST power module, and the other end of which is connected to the anode of diode D1 and one end of resistor R1.

[0011] Preferably, the BOOST power module includes a quasi-resonant chip U1, an inductor L1, and an N-MOS transistor Q1.

[0012] The power supply VIN is connected to one end of capacitor C2, and the other end of capacitor C2 is connected to ground GND. The power supply VIN is connected to pin 1 VIN of quasi-resonant chip U1; pin 6 GND of quasi-resonant chip U1 is connected to the circuit ground GND.

[0013] The power supply VIN is connected to resistor R5. The other end of resistor R5 is connected to one end of resistor R6. The other end of resistor R6 is connected to ground GND. The connection point of resistors R5 and R6 is connected to pin 7 UVLO of quasi-resonant chip U1. Pin 10 SS of quasi-resonant chip U1 is connected to ground GND through capacitor C7. Pin 4 VCC of quasi-resonant chip U1 is connected to ground GND through capacitor C5.

[0014] Pin 9 RT of quasi-resonant chip U1 is connected to one end of resistor R2, and the other end of resistor R2 is connected to ground GND. Pin 5 OUTPUT of quasi-resonant chip U1 is connected to the gate of N-MOS transistor Q1.

[0015] 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.

[0016] The source of 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.

[0017] The source of N-MOS transistor Q1 is also connected to one end of resistor R15. The other end of resistor R15 is connected to one end of capacitor C9 and one end of resistor R16. The other end of capacitor C9 is grounded, and the other end of resistor R16 is connected to pin 8 CS of quasi-resonant chip U1.

[0018] The output of the feedback circuit is connected to pin 2 (FB) of the quasi-resonant chip U1. Pin 2 (FB) of the quasi-resonant chip U1 is also connected to one end of capacitor C8 and one end of resistor R13. The other end of capacitor C8 is connected to one end of resistor R12. The other end of resistor R12 is connected to pin 3 (COMP) of the quasi-resonant chip U1. The other end of resistor R13 is also connected to pin 3 (COMP) of the quasi-resonant chip U1.

[0019] Preferably, pin 5 OUTPUT of the quasi-resonant chip U1 is connected to the gate of the N-MOS transistor Q1 through resistor R3.

[0020] Preferably, the sampling resistor is a parallel branch consisting of resistors R7 and R4.

[0021] Preferably, the specific model of the quasi-resonant chip U1 is LM5022.

[0022] Preferably, the feedback circuit includes transistor Q2, transistor Q3, resistors R9, R10, R11, and R17.

[0023] The positive voltage output terminal of the jitter power supply is connected to one end of resistors R9 and R10 respectively. The other end of resistor R9 is connected to the emitter of diode Q2, and the other end of resistor R10 is connected to the emitter of diode Q3.

[0024] The negative voltage output terminal of the jitter power supply is connected to one end of resistor R11, and the other end of resistor R11 is connected to the collector of transistor Q2, the base of transistor Q2, and the base of transistor Q3, respectively.

[0025] One end of resistor R17 and the collector of transistor Q3 are both connected to pin 2 FB of quasi-resonant chip U1, and one end of resistor R17 is connected to ground.

[0026] As a general inventive concept, this utility model also provides a laser gyroscope, which includes the aforementioned jitter power supply.

[0027] Compared with the prior art, the advantages of this utility model are:

[0028] This invention uses a BOOST power module, positive and negative output rectifier circuits, and a feedback circuit to form the jitter power supply for the laser gyroscope. The BOOST power module has a higher switching frequency than the Royal circuit, which allows for the use of a lower inductance 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 reduces the ripple voltage output of the circuit, thereby improving the accuracy of the laser gyroscope.

[0029] Meanwhile, to ensure that the circuit can output positive and negative voltages, this invention combines a reverse polarity BOOST circuit, which uses the current limiting function of the diode and the energy storage function of the capacitor to achieve the output of positive and negative voltages.

[0030] Furthermore, since both positive and negative output voltages are connected to the feedback circuit, control over the positive and negative output voltages is achieved, thereby further reducing the ripple voltage of the positive and negative output voltages. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a circuit diagram of the laser gyroscope jitter power supply according to an embodiment of the present 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] This embodiment provides a switching power supply for powering the jitter drive of a laser gyroscope, namely a laser gyroscope jitter power supply, which includes a BOOST power module, positive and negative output rectifier circuits, and a feedback circuit.

[0035] The BOOST power module mainly includes a quasi-resonant chip U1, an inductor L1, and an N-MOS transistor Q1. The specific model of the quasi-resonant chip U1 is LM5022. The positive and negative output rectifier circuits include a positive voltage output module and a negative voltage output module. The positive voltage output module includes a capacitor C1, a resistor R1, a diode D2, a diode D4, and a capacitor C4. The negative voltage output module includes a capacitor C3, a diode D3, a resistor R8, a diode D4, and a capacitor C6.

[0036] The power supply VIN is connected to one end of capacitor C2, and the other end of capacitor C2 is connected to ground GND. Capacitor C2 is a filter capacitor used to filter the power supply VIN.

[0037] The power supply VIN is connected to pin 1 (VIN) of the chip U1-LM5022 to supply power to the chip.

[0038] The power supply VIN is connected to resistor R5, the other end of which is connected to resistor R6. The other end of resistor R6 is connected to ground GND. The connection between resistors R5 and R6 is connected to pin 7 (UVLO) of chip U1-LM5022. Resistors R5 and R6 divide the power supply VIN, which is used to set the voltage value for the chip's UVLO function.

[0039] Pin 10 (SS) of chip U1-LM5022 is connected to ground (GND) through capacitor C7. Pin 10 (SS) is the soft-start switch of the chip. By setting different values ​​of capacitor C7, the startup of chip U1-LM5022 can be controlled.

[0040] The VCC pin of chip U1-LM5022 is connected to ground (GND) through capacitor C5. 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.

[0041] Pin 9 (RT) of chip U1-LM5022 is connected to resistor R2, and the other end of resistor R2 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.

[0042] The OUTPUT pin 5 of the chip U1-LM5022 is connected to the gate of the N-MOS transistor Q1 through resistor R3, which is used to control the conduction of the N-MOS transistor Q1.

[0043] The source of N-MOS transistor Q1 is connected to one end of resistors R4 and R7, and the other end of resistors R4 and R7 is connected to ground (GND). That is, resistors R4 and R7 are connected in parallel. The source of N-MOS transistor Q1 is also connected to one end of resistor R15. The other end of resistor R15 is connected to capacitor C9 and one end of resistor R16. The other end of capacitor C9 is connected to ground (GND). The other end of resistor R16 is connected to pin 8 (CS) of chip U1 LM5022. Resistors R4 and R7 are used 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 satisfies circuit loop stability during actual debugging. Resistor R15 and capacitor C9 form a low-pass filter to filter out interference spikes generated by the sampling of resistors R4 and R7. The voltage signal across resistors R4 and R7 is input to pin 8 (CS) of the LM5022 via resistor R16, 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 R4 and R7 can prevent magnetic saturation of inductor L1.

[0044] 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 also to one end of capacitor C1 and capacitor C3.

[0045] The other end of capacitor C1 is connected to the anode of diode D1 and one end of resistor R1, respectively. The cathode of diode D1 is connected to one end of capacitor C4, and this connection serves as the positive voltage output terminal of the jitter power supply. The other end of capacitor C4 is connected to ground (GND) and acts as a filter capacitor for the positive voltage output terminal. The other end of resistor R1 is connected to the cathode of diode D2, and the anode of diode D2 is connected to ground, serving as a current limiting function in the circuit.

[0046] The other end of capacitor C3 is connected to the cathode of diode D4 and one end of resistor R8, respectively. The anode of diode D4 is connected to one end of capacitor C6, and this connection serves as the negative voltage output terminal of the jitter power supply. The other end of capacitor C6 is connected to ground (GND) and acts as a filter capacitor for the positive voltage output terminal. The other end of resistor R8 is connected to the anode of diode D3, and the cathode of diode D3 is connected to ground, serving as a current-limiting capacitor in the circuit.

[0047] The working principle of the BOOST circuit is as follows: In the first cycle of PWM, when the PWM rectangular wave output by pin 5 OUTPUT of chip U1 LM5022 is high, N-MOS transistor Q1 is turned on. At this time, the drain voltage of N-MOS transistor Q1 is close to GND. Since diodes have a turn-on voltage requirement, diodes D1, D2, D3, and D4 in the circuit are not turned on. Thus, the power supply VIN is only connected to ground through inductor L1, N-MOS transistor Q1, and parallel resistors R4 and R7. The power supply VIN only charges and stores energy for inductor L1.

[0048] When the PWM rectangular wave is low, N-MOS transistor Q1 is off. The energy stored in power supply VIN and inductor L1 charges capacitor C4 through capacitor C1 and diode D1, and also supplies power to the load connected to the circuit, forming a positive voltage output. Since the energy stored in power supply VIN and inductor L1 is used for power supply at this time, a positive voltage boost is achieved. Energy is also stored in capacitor C1 at this time. The energy stored in power supply VIN and inductor L1 then passes through capacitor C3, resistor R8, and diode D3, thus storing energy in capacitor C3.

[0049] When the PWM rectangular wave reaches its second cycle, and is at a high level, N-MOS transistor Q1 is turned on. At this time, the power supply VIN continues to charge inductor L1, storing energy. The energy stored in capacitor C4 is released to power the positive voltage load, ensuring the normal operation of the positive voltage output. The energy stored in capacitor C3 is supplied through N-MOS transistor Q1, resistors R4 and R7, capacitor C6, and diode D4, powering capacitor C6 and the connected load, forming a negative voltage output. This is because the energy supplied by power supply VIN and the energy stored in capacitor C3 work together to power the circuit, thus achieving a negative voltage boost. The energy stored in capacitor C1 is released through N-MOS transistor Q1, resistors R4 and R7, diode D2, and resistor R1.

[0050] In this embodiment, capacitors C1 and C3 also serve as circuit protection. When an external load experiences a short circuit, the power supply VIN will not directly supply power to the short-circuited load through inductor L1.

[0051] Pin 3 (COMP) of chip U1-LM5022 is connected to one end of resistor R12. The other end of resistor R12 is connected to one end of capacitor C8. The other end of capacitor C8 is connected to pin 2 of chip U1-LM5022. Pin 3 (COMP) of chip U1-LM5022 is connected to one end of resistor R13. The other end of R13 is connected to pin 2 (VFB) of chip U1-LM5022, forming the loop response circuit of the BOOST switching power supply.

[0052] The feedback circuit includes transistors Q2 and Q3, resistors R9, R10, R11, and R17. The feedback loop is described in detail below:

[0053] Pin 2 (VFB) of chip U1-LM5022 is connected to one end of resistor R17 and the collector of PNP transistor Q3. The other end of resistor R17 is connected to ground (GND). The base of PNP transistor Q3 is connected to the base and collector of PNP transistor Q2. The collector of PNP transistor Q2 is connected to one end of resistor R11. The other end of resistor R11 is connected to the negative voltage output terminal. The emitter of PNP transistor Q3 is connected to one end of resistor R10. The other end of R10 is connected to one end of resistor R9 and to the positive voltage output terminal. The other end of resistor R9 is connected to the emitter of PNP transistor Q2, forming a mirror constant current source feedback loop.

[0054] Both positive and negative output voltages are connected to the first arm of the mirror constant current source (composed of resistors R9 and R11, and PNP transistor Q2), thus forming one current path. The second arm of the mirror constant current source (composed of resistors R10 and R17, and PNP transistor Q3) is connected to the positive voltage output terminal and pin 2 (VFB) of chip U1 LM5022, respectively, to provide a confirmation current path, thereby providing feedback control to the current of the first arm. Simultaneously, the loop response circuit connected to pin 2 (VFB) of chip U1 LM5022, through the internal circuitry of chip U1 LM5022, controls the PWM rectangular wave output from pin 6 (OUTPUT), thereby achieving negative feedback control of the output voltage.

[0055] Because both the positive and negative output voltages are connected to the mirror constant current source feedback loop, the positive and negative output voltages are controlled, thereby reducing the ripple voltage of the positive and negative output voltages.

[0056] This invention is the first to use the LM5022 chip to build a BOOST circuit for the jitter power supply of a laser gyroscope. The BOOST circuit has higher efficiency than the Royal circuit and lower ripple voltage. Furthermore, to ensure the circuit can output positive and negative voltages (±65V), this invention combines a positive and negative output rectifier circuit with a reverse polarity BOOST circuit, cleverly utilizing diodes and capacitors for energy storage. The negative voltage output is achieved through diode current limiting. A mirror constant current source feedback loop is also designed to reduce the ripple voltage at the negative voltage output terminal. Therefore, compared to a flyback switching power supply, the ripple voltage at the negative voltage output terminal is lower.

[0057] The LM5022 chip has an extremely high switching frequency. The PWM rectangular wave can be adjusted by setting the resistance value of resistor R2 in the external circuitry of the chip, which can maximize the switching frequency. 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:

[0058]

[0059] In the formula Indicates the input voltage. Indicates the conduction time. This 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. Increasing the switching frequency allows for a larger peak current using a lower inductance value, thus reducing the inductor's size and overall circuit size. Furthermore, the feedback loop employs a mirrored constant current source feedback loop, further minimizing output voltage ripple.

[0060] In summary, the advantages of this jitter power supply are: compared to the royal circuit, it has higher circuit efficiency and lower ripple voltage. Furthermore, compared to a flyback switching power supply, it has lower ripple voltage at the negative voltage output. Additionally, due to the high-frequency PWM rectangular wave output by the LM5022 chip, the inductor size in the BOOST circuit can be reduced, thereby reducing the overall circuit size.

[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 gyroscope jitter power supply, characterized in that, It includes a BOOST power module, positive and negative output rectifier circuits and a feedback circuit. The positive and negative output rectifier circuits include a positive voltage output module and a negative voltage output module. The positive voltage output module includes a resistor R1, a diode D2, a diode D1, and a capacitor C4. The negative voltage output module includes a capacitor C3, a diode D3, a resistor R8, a diode D4, and a capacitor C6. The output terminal of the BOOST power module is connected to the anode of diode D1 and one end of resistor R1. The cathode of diode D1 is connected to one end of capacitor C4. The connection between diode D1 and capacitor C4 is the positive voltage output terminal of the jitter power supply. The other end of capacitor C4 is connected to ground GND. The other end of resistor R1 is connected to the cathode of diode D2. The anode of diode D2 is connected to ground. The output terminal of the BOOST power module is also connected to one end of capacitor C3. The other end of capacitor C3 is connected to the cathode of diode D4 and one end of resistor R8. The anode of diode D4 is connected to one end of capacitor C6. The connection between diode D4 and capacitor C6 is the negative voltage output terminal of the jitter power supply. The other end of capacitor C6 is connected to ground GND. The other end of resistor R8 is connected to the anode of diode D3. The cathode of diode D3 is connected to ground. The positive voltage output terminal of the jitter power supply and the negative voltage output terminal of the feedback circuit are both 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.

2. The laser gyroscope jitter power supply according to claim 1, characterized in that, The positive voltage output module also includes a capacitor C1. One end of the capacitor C1 is connected to the output terminal of the BOOST power module, and the other end of the capacitor C1 is connected to the anode of the diode D1 and one end of the resistor R1.

3. The laser gyroscope jitter power supply according to claim 1 or 2, characterized in that, 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 C2, and the other end of capacitor C2 is connected to ground GND. The power supply VIN is connected to pin 1 VIN of quasi-resonant chip U1; pin 6 GND of quasi-resonant chip U1 is connected to the circuit ground GND. The power supply VIN is connected to resistor R5. The other end of resistor R5 is connected to one end of resistor R6. The other end of resistor R6 is connected to ground GND. The connection point of resistors R5 and R6 is connected to pin 7 UVLO of quasi-resonant chip U1. Pin 10 SS of quasi-resonant chip U1 is connected to ground GND through capacitor C7. Pin 4 VCC of quasi-resonant chip U1 is connected to ground GND through capacitor C5. Pin 9 RT of quasi-resonant chip U1 is connected to one end of resistor R2, and the other end of resistor R2 is connected to ground GND. Pin 5 OUTPUT of 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 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 source of N-MOS transistor Q1 is also connected to one end of resistor R15. The other end of resistor R15 is connected to one end of capacitor C9 and one end of resistor R16. The other end of capacitor C9 is grounded, and the other end of resistor R16 is connected to pin 8 CS of quasi-resonant chip U1. The output of the feedback circuit is connected to pin 2 (FB) of the quasi-resonant chip U1. Pin 2 (FB) of the quasi-resonant chip U1 is also connected to one end of capacitor C8 and one end of resistor R13. The other end of capacitor C8 is connected to one end of resistor R12. The other end of resistor R12 is connected to pin 3 (COMP) of the quasi-resonant chip U1. The other end of resistor R13 is also connected to pin 3 (COMP) of the quasi-resonant chip U1.

4. The laser gyroscope jitter 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 R3.

5. The laser gyroscope jitter power supply according to claim 3, characterized in that, The sampling resistor is a parallel branch consisting of resistors R7 and R4.

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

7. The laser gyroscope jitter power supply according to claim 3, characterized in that, The feedback circuit includes transistors Q2 and Q3, resistors R9, R10, R11, and R17. The positive voltage output terminal of the jitter power supply is connected to one end of resistors R9 and R10 respectively. The other end of resistor R9 is connected to the emitter of diode Q2, and the other end of resistor R10 is connected to the emitter of diode Q3. The negative voltage output terminal of the jitter power supply is connected to one end of resistor R11, and the other end of resistor R11 is connected to the collector of transistor Q2, the base of transistor Q2, and the base of transistor Q3, respectively. One end of resistor R17 and the collector of transistor Q3 are both connected to pin 2 FB of quasi-resonant chip U1, and one end of resistor R17 is connected to ground.

8. A laser gyroscope, characterized in that, The laser gyroscope includes a dithering power supply as described in any one of claims 1-7.

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