Voltage pre-stabilizing circuit and device

Abstract

The invention provides a pre-voltage-stabilizing circuit and device, the circuit comprises an input module, a voltage dividing module, an adjusting module, a negative feedback module and a voltage output module, the input module is used for obtaining an input voltage and a bias current; the voltage division module is used for performing voltage division adjustment on the input voltage according to the bias current to obtain branch voltage; the adjusting module is used for generating adjusting voltage according to input voltage and target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the adjusting voltage; the voltage output module is used for outputting the target output voltage. According to the pre-voltage-stabilizing circuit provided by the invention, the target output voltage is generated through negative feedback regulation, so that the regulation module can carry out real-time regulation according to the change of the target output voltage, the target output voltage is ensured not to be influenced by the load current through a negative feedback mechanism under the condition that the load current is relatively large, and the stability of the output voltage is improved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a pre-stabilization circuit and a device. Background Art

[0002] As electronic devices continue to develop in the direction of miniaturization, high performance and multi-function, the internal circuit system of electronic devices has become more and more complex and sophisticated, and the sensitivity to power supply stability has also increased. The pre-stabilization circuit plays a vital role in the entire power supply system. Its core function is to be able to efficiently and stably convert the input higher voltage into a lower voltage that meets specific requirements. In practical applications, it is often required that the circuit can quickly output a stable voltage that can be directly used by subsequent circuits as soon as the power supply is powered on. In addition, based on the consideration of various factors such as actual application scenarios and costs, it is hoped that the design of the pre-stabilization circuit is as simple as possible, reducing unnecessary complex components and line connections, and reducing costs and failure probability. At the same time, the circuit is required to have a high degree of reliability during the power-on process, and can ensure normal startup and stable operation under any working conditions, without circuit failure or output abnormality caused by voltage shock or other interference at the moment of power-on. In addition, there are also high requirements for the stability of the output voltage. In various situations such as input voltage fluctuations and load changes, the output voltage can always be kept relatively stable, thereby providing a stable and reliable power supply for subsequent electronic equipment or circuits, and ensuring the normal operation of the entire system.

[0003] At present, a common way to implement a pre-regulator circuit is to use a voltage regulator to provide a stable voltage output. The bias current generated inside the circuit is applied to the voltage regulator through a current mirror, thereby generating a control voltage for the power tube. However, since the gate voltage of the power tube is not affected by the load current, when the load current is large, the output voltage will show a significant downward trend and the output voltage will be unstable. Summary of the invention

[0004] The present invention aims to provide a pre-voltage stabilization circuit and device to solve the above technical problems and achieve the goal of ensuring that the output voltage is not affected by the load current through a negative feedback mechanism when the load current is large, thereby improving the output voltage stability.

[0005] In order to solve the above technical problems, the present invention provides a pre-voltage stabilization circuit, including an input module, a voltage dividing module, a regulating module, a negative feedback module and a voltage output module; wherein:

[0006] The input module is used to obtain input voltage and bias current;

[0007] The voltage division module is used to adjust the input voltage according to the bias current to obtain the branch voltage;

[0008] The regulating module is used to generate a regulating voltage according to the input voltage and the target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage;

[0009] The voltage output module is used to output a target output voltage.

[0010] In the above scheme, a voltage divider module is used to adjust the input voltage under the drive of bias current to provide a suitable branch voltage for the subsequent circuit; an adjustment module is used to control the input voltage and the target output voltage to ensure that the generated adjustment voltage meets the requirements of the subsequent circuit; a negative feedback module is used to receive the branch voltage and the adjustment voltage, and generate the target output voltage through negative feedback adjustment, so that the adjustment module can be adjusted in real time according to the change of the target output voltage. When the target output voltage is large, the target output voltage is reduced through negative feedback; when the target output voltage is small, the target output voltage is increased through negative feedback to keep the target output voltage stable, so that when the load current is large, the negative feedback mechanism can ensure that the target output voltage is not affected by the load current, thereby improving the output voltage stability.

[0011] Furthermore, the voltage divider module includes a first PMOS tube and a second PMOS tube; wherein:

[0012] The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

[0013] In the above scheme, when the input voltage increases, the absolute value of the gate-source voltage of the second PMOS tube decreases under the condition that the bias current remains unchanged. According to the characteristics of the PMOS tube, within a certain range, its on-resistance is inversely proportional to the absolute value of the gate-source voltage, that is, when the absolute value of the gate-source voltage of the second PMOS tube decreases, the on-resistance of the second PMOS tube increases; after the second PMOS tube is turned on, the current flows to the source of the first PMOS tube; since the gate of the first PMOS tube is connected to the drain of the second PMOS tube, the change of the potential of the drain of the second PMOS tube will affect the gate-source voltage of the first PMOS tube, thereby changing the on-resistance of the first PMOS tube, and within a certain range, the on-resistance of the first PMOS tube is inversely proportional to the absolute value of the gate-source voltage of the first PMOS tube. Therefore, when the absolute value of the gate-source voltage of the first PMOS tube decreases, the on-resistance of the first PMOS tube increases; through the change of the on-resistance of the second PMOS tube and the first PMOS tube, the input voltage is divided and adjusted, and the voltage output to the first PMOS tube is initially stabilized.

[0014] Furthermore, the regulating module includes a first NMOS tube; wherein:

[0015] The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

[0016] In the above scheme, the gate potential of the first NMOS tube affects the conduction degree of the first NMOS tube, so that the input voltage and the target output voltage can be adjusted to generate a regulation voltage: after the gate potential of the first NMOS tube increases, according to the characteristics of the NMOS tube, its on-resistance increases; the increase in the on-resistance of the first NMOS tube will reduce the current flowing from the first PMOS tube to the output end, thereby suppressing the increase of the target output voltage and causing the output voltage to change in a stable direction.

[0017] Furthermore, the negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0018] The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube;

[0019] The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube;

[0020] The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube;

[0021] The source of the second NMOS tube is electrically connected to the voltage output module;

[0022] The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

[0023] In the above scheme, the negative feedback module has a voltage feedback mechanism: the change of the branch voltage will be fed back to the gate of the first NMOS tube through the current mirror structure composed of the second NMOS tube and the third NMOS tube, forming a negative feedback regulation; when the target output voltage increases, the gate-source voltage of the third NMOS tube will increase. In order to keep the current of the first PMOS tube and the third NMOS tube equal, the source potential of the third NMOS tube increases, so that the on-resistance of the third NMOS tube changes, and the change of the drain current of the third NMOS tube is fed back to the gate of the first NMOS tube; because the drain of the third NMOS tube is connected to the gate of the first NMOS tube, the change of the current of the third NMOS tube will cause the first The gate potential of the NMOS tube decreases; the current of the first NMOS tube decreases, and the target output voltage decreases accordingly; a negative feedback is formed to keep the output voltage relatively stable; when the target output voltage decreases, the gate-source voltage of the third NMOS tube will decrease. In order to keep the currents of the first PMOS tube and the third NMOS tube equal, the source potential of the third NMOS tube decreases, causing the on-resistance of the third NMOS tube to change. Since the drain of the third NMOS tube is connected to the gate of the first NMOS tube, the change in the current of the third NMOS tube will cause the gate potential of the first NMOS tube to increase; the current of the first NMOS tube increases, and the target output voltage increases accordingly; a negative feedback is formed to keep the output voltage relatively stable.

[0024] Furthermore, the negative feedback module further includes a first voltage regulator tube; wherein:

[0025] The anode of the first voltage regulator is electrically connected to the voltage output module;

[0026] The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube.

[0027] In the above solution, the first voltage regulator tube plays a role in the discharge process and in protecting the target output voltage.

[0028] The present invention provides a pre-stabilization device, comprising a housing, wherein the housing is provided with the above-mentioned pre-stabilization circuit; the housing also comprises a voltage input interface, a current input interface and a voltage output interface; wherein:

[0029] The input module is used to obtain input voltage and bias current;

[0030] The voltage division module is used to adjust the input voltage according to the bias current to obtain the branch voltage;

[0031] The regulating module is used to generate a regulating voltage according to the input voltage and the target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage;

[0032] The voltage output module is used to output a target output voltage;

[0033] The input module is electrically connected to the voltage input interface and is used to obtain input voltage;

[0034] The input module is electrically connected to the current input interface and is used to obtain the bias current;

[0035] The voltage output interface is electrically connected to the voltage output module and is used to output a target output voltage.

[0036] The pre-voltage stabilization device provided by the above scheme has a simple structure. In practical applications, it only needs to connect the input module through the voltage input interface, connect the input module through the current input interface, and output the voltage of the voltage output module through the voltage output interface. In this way, when the load current is large, the negative feedback mechanism can ensure that the output voltage is not affected by the load current, thereby improving the output voltage stability.

[0037] Furthermore, the voltage divider module includes a first PMOS tube and a second PMOS tube; wherein:

[0038] The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

[0039] Furthermore, the regulating module includes a first NMOS tube; wherein:

[0040] The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

[0041] Furthermore, the negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0042] It includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0043] The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube;

[0044] The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube;

[0045] The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube;

[0046] The source of the second NMOS tube is electrically connected to the voltage output module;

[0047] The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

[0048] Furthermore, the negative feedback module further includes a first voltage regulator tube; wherein:

[0049] The anode of the first voltage regulator is electrically connected to the voltage output module;

[0050] The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 A structural diagram of a pre-voltage stabilization circuit provided in one embodiment of the present invention;

[0052] Figure 2 A circuit structure diagram of a pre-voltage stabilization circuit provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] See also Figure 1 This embodiment provides a pre-stabilization circuit. For details of its architecture, please refer to Figure 1 ,include:

[0055] Input module, used to obtain input voltage and bias current;

[0056] A voltage divider module is used to divide the input voltage according to the bias current to obtain the branch voltage;

[0057] A regulating module, used for generating a regulating voltage according to an input voltage and a target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage;

[0058] The voltage output module is used to output the target output voltage.

[0059] A pre-voltage stabilization circuit provided in the present embodiment adopts a voltage divider module to adjust the input voltage under the drive of a bias current, so as to provide a suitable branch voltage for a subsequent circuit; adopts an adjustment module to control the input voltage and the target output voltage, so as to ensure that the generated adjustment voltage meets the requirements of the subsequent circuit; adopts a negative feedback module to receive the branch voltage and the adjustment voltage, and generates the target output voltage through negative feedback adjustment, so that the adjustment module can be adjusted in real time according to the change of the target output voltage. When the target output voltage is large, the target output voltage is reduced through negative feedback; when the target output voltage is small, the target output voltage is increased through negative feedback to keep the target output voltage stable, so as to ensure that the target output voltage is not affected by the load current through the negative feedback mechanism when the load current is large, thereby improving the stability of the output voltage; the pre-voltage stabilization circuit is used to convert a higher voltage into a lower voltage, and outputs the target output voltage as soon as the power supply is powered on, and has the characteristics of simple circuit, reliable power-on process, and ability to maintain a stable target output voltage.

[0060] See also Figure 2 , which is a circuit structure diagram of a pre-voltage stabilization circuit provided in this embodiment, wherein the voltage dividing module includes a first PMOS tube and a second PMOS tube; wherein:

[0061] The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

[0062] In this embodiment, when the input voltage increases, the absolute value of the gate-source voltage of the second PMOS tube decreases under the condition that the bias current remains unchanged. According to the characteristics of the PMOS tube, within a certain range, its on-resistance is inversely proportional to the absolute value of the gate-source voltage, that is, when the absolute value of the gate-source voltage of the second PMOS tube decreases, the on-resistance of the second PMOS tube increases; after the second PMOS tube is turned on, the current flows to the source of the first PMOS tube; since the gate of the first PMOS tube is connected to the drain of the second PMOS tube, the change of the potential of the drain of the second PMOS tube will affect the gate-source voltage of the first PMOS tube, thereby changing the on-resistance of the first PMOS tube, and within a certain range, the on-resistance of the first PMOS tube is inversely proportional to the absolute value of the gate-source voltage of the first PMOS tube. Therefore, when the absolute value of the gate-source voltage of the first PMOS tube decreases, the on-resistance of the first PMOS tube increases; through the change of the on-resistance of the second PMOS tube and the first PMOS tube, the input voltage is divided and adjusted, and the voltage output to the first PMOS tube is initially stabilized.

[0063] Furthermore, the regulating module includes a first NMOS tube; wherein:

[0064] The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

[0065] In this embodiment, the gate potential of the first NMOS tube affects the conduction degree of the first NMOS tube, so that the input voltage and the target output voltage can be adjusted to generate a regulation voltage: after the gate potential of the first NMOS tube increases, according to the characteristics of the NMOS tube, its on-resistance increases; the increase in the on-resistance of the first NMOS tube will reduce the current flowing from the first PMOS tube to the output end, thereby suppressing the increase of the target output voltage and causing the output voltage to change in a stable direction.

[0066] In this embodiment, the negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0067] The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube;

[0068] The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube;

[0069] The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube;

[0070] The source of the second NMOS tube is electrically connected to the voltage output module;

[0071] The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

[0072] In this embodiment, a current mirror is added: the second NMOS tube and the third NMOS tube, so that the negative feedback module has a voltage feedback mechanism: the change of the branch voltage will be fed back to the gate of the first NMOS tube through the current mirror structure composed of the second NMOS tube and the third NMOS tube, forming a negative feedback regulation. When the target output voltage increases, the gate-source voltage of the third NMOS tube will increase. In order to keep the current of the first PMOS tube and the third NMOS tube equal, the source potential of the third NMOS tube increases, so that the on-resistance of the third NMOS tube changes, and the change of the drain current of the third NMOS tube is fed back to the gate of the first NMOS tube. Since the drain of the third NMOS tube is connected to the gate of the first NMOS tube, the change of the current of the third NMOS tube will cause the gate potential of the first NMOS tube to decrease; the current of the first NMOS tube decreases, and the target output voltage decreases. Negative feedback is formed to keep the output voltage relatively stable; when the target output voltage decreases, the gate-source voltage of the third NMOS tube will decrease. In order to keep the currents of the first PMOS tube and the third NMOS tube equal, the source potential of the third NMOS tube decreases, causing the on-resistance of the third NMOS tube to change. Since the drain of the third NMOS tube is connected to the gate of the first NMOS tube, the change in the current of the third NMOS tube will cause the gate potential of the first NMOS tube to increase; the current of the first NMOS tube increases, and the target output voltage rises, forming negative feedback to keep the output voltage relatively stable.

[0073] Furthermore, the negative feedback module further includes a first voltage regulator tube; wherein:

[0074] The anode of the first voltage regulator is electrically connected to the voltage output module;

[0075] The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube;

[0076] In this embodiment, the first voltage regulator tube plays a role in the discharge process and in protecting the target output voltage.

[0077] Furthermore, the present embodiment provides a pre-stabilization device, comprising a housing, wherein the housing is provided with the above-mentioned pre-stabilization circuit; the housing further comprises a voltage input interface, a current input interface and a voltage output interface; wherein:

[0078] The input module is used to obtain input voltage and bias current;

[0079] The voltage division module is used to adjust the input voltage according to the bias current to obtain the branch voltage;

[0080] The regulating module is used to generate a regulating voltage according to the input voltage and the target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage;

[0081] The voltage output module is used to output a target output voltage;

[0082] The input module is electrically connected to the voltage input interface and is used to obtain input voltage;

[0083] The input module is electrically connected to the current input interface and is used to obtain the bias current;

[0084] The voltage output interface is electrically connected to the voltage output module and is used to output a target output voltage.

[0085] The pre-voltage stabilization device provided in this embodiment has a simple structure. In practical applications, it only needs to connect the input module through the voltage input interface, connect the input module through the current input interface, and output the voltage of the voltage output module through the voltage output interface. In this way, when the load current is large, the negative feedback mechanism can be used to ensure that the output voltage is not affected by the load current, thereby improving the output voltage stability.

[0086] Furthermore, the voltage divider module includes a first PMOS tube and a second PMOS tube; wherein:

[0087] The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

[0088] Furthermore, the regulating module includes a first NMOS tube; wherein:

[0089] The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

[0090] Furthermore, the negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0091] It includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein:

[0092] The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube;

[0093] The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube;

[0094] The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube;

[0095] The source of the second NMOS tube is electrically connected to the voltage output module;

[0096] The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

[0097] Furthermore, the negative feedback module further includes a first voltage regulator tube; wherein:

[0098] The anode of the first voltage regulator is electrically connected to the voltage output module;

[0099] The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube.

[0100] This embodiment uses a negative feedback module to receive the branch voltage and the regulation voltage, and generates the target output voltage through negative feedback regulation, so that the regulation module can be adjusted in real time according to the change of the target output voltage. When the target output voltage is large, the target output voltage is reduced through negative feedback; when the target output voltage is small, the target output voltage is increased through negative feedback to keep the target output voltage stable, thereby ensuring that the target output voltage is not affected by the load current through the negative feedback mechanism when the load current is large, thereby improving the stability of the output voltage.

[0101] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A pre-stabilization circuit, characterized in that: It includes an input module, a voltage dividing module, a regulating module, a negative feedback module and a voltage output module; wherein: The input module is used to obtain input voltage and bias current; The voltage division module is used to adjust the input voltage according to the bias current to obtain the branch voltage; The regulating module is used to generate a regulating voltage according to the input voltage and the target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage; The voltage output module is used to output a target output voltage.

2. A pre-stabilizing circuit according to claim 1, characterized in that: The voltage divider module includes a first PMOS tube and a second PMOS tube; wherein: The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

3. A pre-stabilizing circuit according to claim 2, characterized in that: The regulating module includes a first NMOS tube; wherein: The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

4. A pre-stabilizing circuit according to claim 3, characterized in that: The negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein: The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube; The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube; The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube; The source of the second NMOS tube is electrically connected to the voltage output module; The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

5. A pre-stabilizing circuit according to claim 4, characterized in that: The negative feedback module also includes a first voltage regulator tube; wherein: The anode of the first voltage regulator is electrically connected to the voltage output module; The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube.

6. A pre-voltage stabilization device, characterized in that: It comprises a housing, in which a pre-stabilization circuit as claimed in claim 1 is arranged; the housing also comprises a voltage input interface, a current input interface and a voltage output interface; wherein: The input module is used to obtain input voltage and bias current; The voltage division module is used to adjust the input voltage according to the bias current to obtain the branch voltage; The regulating module is used to generate a regulating voltage according to the input voltage and the target output voltage; the target output voltage is generated by the negative feedback module according to the branch voltage and the regulating voltage; The voltage output module is used to output a target output voltage; The input module is electrically connected to the voltage input interface and is used to obtain input voltage; The input module is electrically connected to the current input interface and is used to obtain the bias current; The voltage output interface is electrically connected to the voltage output module and is used to output a target output voltage.

7. A pre-voltage stabilization device according to claim 6, characterized in that: The voltage divider module includes a first PMOS tube and a second PMOS tube; wherein: The source of the second PMOS tube is connected to the input voltage, the gate of the second PMOS tube is connected to the bias current, the gate of the second PMOS tube is electrically connected to the gate of the first PMOS tube, and the drain of the second PMOS tube is connected to the bias current; the source of the first PMOS tube is connected to the input voltage, the gate of the first PMOS tube is connected to the bias current, and the drain of the first PMOS tube is connected to the output end of the regulation module and the input end of the negative feedback module; the first PMOS tube and the second PMOS tube are used to divide the input voltage according to the bias current to obtain the branch voltage.

8. A pre-voltage stabilization device according to claim 7, characterized in that: The regulating module includes a first NMOS tube; wherein: The source of the first NMOS tube is connected to the input voltage; the drain of the first NMOS tube is electrically connected to the output end of the negative feedback module to obtain the target output voltage; the gate of the first NMOS tube is electrically connected to the drain of the first PMOS tube, and the first NMOS tube is used to generate a regulation voltage according to the input voltage and the target output voltage.

9. A pre-voltage stabilization device according to claim 8, characterized in that: The negative feedback module includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein: It includes a second voltage regulator tube, a second NMOS tube and a third NMOS tube; wherein: The anode of the second voltage regulator is electrically connected to the drain of the first PMOS tube; the cathode of the second voltage regulator is electrically connected to the drain of the third NMOS tube; The source of the third NMOS tube is grounded, and the gate of the third NMOS tube is electrically connected to the source of the second NMOS tube; The drain of the second NMOS tube is grounded, and the source of the second NMOS tube is electrically connected to the gate of the second NMOS tube; The source of the second NMOS tube is electrically connected to the voltage output module; The source of the second NMOS tube is electrically connected to the drain of the first NMOS tube.

10. A pre-voltage stabilization device according to claim 9, characterized in that: The negative feedback module also includes a first voltage regulator tube; wherein: The anode of the first voltage regulator is electrically connected to the voltage output module; The cathode of the first voltage regulator tube is electrically connected to the source of the second NMOS tube.

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