Linear voltage regulators and electrical equipment

Abstract

This application provides a linear voltage regulator and an electrical device, belonging to the field of electronic circuit technology. The linear voltage regulator includes: a linear voltage regulator circuit and a signal generation circuit; the signal generation circuit is connected to the linear voltage regulator circuit and provides multiple reset electrical signals to the linear voltage regulator circuit, which outputs a working voltage; the linear voltage regulator circuit includes: a primary voltage regulator module, a bandgap reference module, and an output voltage regulator module; the primary voltage regulator module is connected to the bandgap reference module, which is also connected to the output voltage regulator module; the output voltage regulator module disconnects the output based on a first reset electrical signal and also outputs a voltage based on a third reset electrical signal; the bandgap reference module provides a startup voltage to the output voltage regulator module based on a second reset electrical signal; the primary voltage regulator module provides the input voltage. This application can prevent chips or components from being damaged due to voltage exceeding the specified range.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and more specifically, to a linear voltage regulator and electrical equipment. Background Technology

[0002] During operation, electrical devices typically require a power supply to provide power. The power supply usually starts from 0 and changes to a larger voltage in a very short time, such as 1μs. During the power-on process, the reference voltage will generate a large voltage overshoot due to the rapid power-on of the power supply, and this overshoot will be amplified by the linear regulator, resulting in a voltage range that exceeds the internal components' tolerance.

[0003] This can lead to damage to some chips or components in the circuit due to exceeding their voltage tolerance during rapid power-up, thus affecting the lifespan of the chips or components. Summary of the Invention

[0004] The purpose of this application is to provide a linear voltage regulator and electrical equipment that can prevent chips or components from being damaged due to exceeding the voltage range.

[0005] The embodiments of this application are implemented as follows:

[0006] One aspect of this application provides a linear voltage regulator device, including: a linear voltage regulator circuit and a signal generation circuit;

[0007] The signal generation circuit is connected to the linear voltage regulator circuit. The signal generation circuit is used to provide multiple reset electrical signals to the linear voltage regulator circuit, which is used to output the working voltage.

[0008] The linear voltage regulator circuit includes: a primary voltage regulator module, a bandgap reference module, and an output voltage regulator module;

[0009] The primary voltage regulator module is connected to the bandgap reference module, which is also connected to the output voltage regulator module.

[0010] Among them, the bandgap reference module is connected to the second reset electrical signal, and the output voltage regulator module is connected to the first reset electrical signal and the third reset electrical signal. The first reset electrical signal, the second reset electrical signal and the third reset electrical signal are reset electrical signals sent sequentially according to the timing sequence.

[0011] The output voltage regulator module is used to disconnect the output according to the first reset electrical signal, and the output voltage regulator module is also used to output voltage according to the third reset electrical signal; the bandgap reference module is used to provide the start-up voltage to the output voltage regulator module according to the second reset electrical signal; the primary voltage regulator module is used to provide the input voltage.

[0012] Optionally, the bandgap reference module includes a startup unit, which includes a startup switch, multiple resistors, and multiple capacitors. The bandgap reference module is connected to the output voltage regulator module through the startup unit.

[0013] The start switch is used to turn on after receiving the second reset electrical signal, and the start unit is used to provide the start voltage to the output voltage regulator module after the start switch is turned on.

[0014] Optionally, the linear regulator circuit may further include: a reference voltage module;

[0015] The reference voltage module is connected to the output terminal, and the reference voltage module is connected to the first reset electrical signal and the third reset electrical signal;

[0016] The reference voltage module is used to disconnect the output when a third reset electrical signal is received, and the reference voltage module is also used to output voltage when a first reset electrical signal is received.

[0017] Optionally, the reference voltage module includes: a first switch, the reference voltage module being connected to the output terminal via the first switch;

[0018] The first switch turns on after receiving the first reset signal, and turns off after receiving the third reset signal.

[0019] Optionally, the output voltage regulator module includes: a second switch, through which the output voltage regulator module is connected to the output terminal;

[0020] The second switch opens after receiving the first reset signal and turns on after receiving the third reset signal.

[0021] Optionally, the signal generation circuit includes: a bias generation module, an oscillation module, and a reset signal generation module;

[0022] The bias generation module is connected to the oscillation module. The bias generation module is used to generate bias current and send the bias current to the oscillation module.

[0023] The oscillation module is connected to the reset signal generation module. The oscillation module is used to generate an oscillation voltage based on the bias current and send the oscillation voltage to the reset signal generation module.

[0024] The reset signal generation module is connected to the linear voltage regulator circuit. The reset signal generation module is used to generate multiple reset electrical signals with different timings according to the oscillation voltage, and send each reset electrical signal to the linear voltage regulator circuit in sequence.

[0025] Optionally, the reset signal generation module includes: a frequency divider and multiple flip-flops;

[0026] The frequency divider is connected to the oscillation module and is used to divide the received oscillation voltage.

[0027] Multiple flip-flops are connected to a frequency divider in sequence. The frequency divider is used to send a frequency-divided oscillation voltage to each flip-flop, and each flip-flop is used to generate a reset electrical signal based on the frequency-divided oscillation voltage.

[0028] Optionally, the signal generation circuit further includes: an initial reset module;

[0029] The initial reset module is connected to the frequency divider and each flip-flop, and is used to initialize and reset the frequency divider and each flip-flop.

[0030] Optionally, the oscillation module includes a ring oscillator, which generates an oscillation voltage of a corresponding waveform based on the input bias current.

[0031] In another aspect of the embodiments of this application, an electrical device is provided, which includes a linear voltage regulator and an electrical device connected to the linear voltage regulator.

[0032] The beneficial effects of the embodiments of this application include:

[0033] In a linear voltage regulator and electrical device provided in this application embodiment, a signal generation circuit is connected to a linear voltage regulator circuit. The signal generation circuit provides multiple reset electrical signals to the linear voltage regulator circuit, which outputs a working voltage. A primary voltage regulator module is connected to a bandgap reference module, which is also connected to an output voltage regulator module. The output voltage regulator module disconnects its output based on a first reset electrical signal and outputs a voltage based on a third reset electrical signal. The bandgap reference module provides a startup voltage to the output voltage regulator module based on a second reset electrical signal. The primary voltage regulator module provides the input voltage. Since the timing of the multiple reset electrical signals is different, the connection state of the output voltage regulator module can be controlled based on different reset electrical signals. This allows the output voltage regulator module to be disconnected when a voltage surge occurs, preventing the voltage surge from affecting the output and thus avoiding damage to chips or components due to exceeding the voltage range. This further improves the lifespan of chips or components in the circuit. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the linear voltage regulator provided in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the bandgap reference module in the linear voltage regulator provided in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the reference voltage module in the linear voltage regulator provided in the embodiments of this application;

[0038] Figure 4 This is a schematic diagram of the output voltage regulator module in the linear voltage regulator device provided in the embodiments of this application;

[0039] Figure 5 This is a schematic diagram of the signal generation circuit provided in an embodiment of this application;

[0040] Figure 6 This is another schematic diagram of the signal generation circuit provided in the embodiments of this application;

[0041] Figure 7 This is a schematic diagram of the structure of the electrical equipment provided in the embodiments of this application.

[0042] Icons: 10 - Electrical device; 20 - Linear voltage regulator; 100 - Linear voltage regulator circuit; 110 - Primary voltage regulator module; 120 - Bandgap reference module; 121 - Start-up unit; 130 - Output voltage regulator module; 140 - Reference voltage module; 200 - Signal generation circuit; 210 - Bias generation module; 220 - Oscillation module; 230 - Reset signal generation module; 240 - Initial reset module; S0 - Start switch; S1 - First switch; S2 - Second switch; R1 - First resistor; R2 - Second resistor; C1 - First capacitor; C2 - Second capacitor; D - Flip-flop; DIV - Frequency divider. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0046] In the description of this application, it should be noted that the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] The following section will explain the specific structural relationship and working principle of the linear voltage regulator provided in the embodiments of this application.

[0048] Figure 1 Please refer to the schematic diagram of the linear voltage regulator provided in the embodiments of this application. Figure 1 A linear voltage regulator includes a linear voltage regulator circuit 100 and a signal generation circuit 200.

[0049] The signal generation circuit 200 is connected to the linear voltage regulator circuit 100. The signal generation circuit 200 is used to provide multiple reset electrical signals to the linear voltage regulator circuit 100, and the linear voltage regulator circuit 100 is used to output the working voltage.

[0050] The linear voltage regulator circuit 100 includes: a primary voltage regulator module 110, a bandgap reference module 120, and an output voltage regulator module 130; the primary voltage regulator module 110 is connected to the bandgap reference module 120, and the bandgap reference module 120 is also connected to the output voltage regulator module 130.

[0051] The bandgap reference module 120 is connected to the second reset signal, and the output voltage regulator module 130 is connected to the first reset signal and the third reset signal. The first reset signal, the second reset signal and the third reset signal are reset signals sent sequentially according to the timing sequence.

[0052] The output voltage regulator module 130 is used to disconnect the output according to the first reset electrical signal, and the output voltage regulator module 130 is also used to output voltage according to the third reset electrical signal; the bandgap reference module 120 is used to provide the output voltage regulator module 130 with the second reset electrical signal; the primary voltage regulator module 110 is used to provide the input voltage.

[0053] Optionally, the linear voltage regulator circuit 100 can be a circuit for outputting a stable voltage. The linear voltage regulator circuit 100 can be connected to the signal generation circuit 200, wherein the signal generation circuit 200 can generate multiple reset electrical signals. Different reset electrical signals can be connected to different positions of the linear voltage regulator circuit 100, thereby controlling the connection or disconnection of different positions of the circuit.

[0054] Specifically, in the linear voltage regulator circuit 100, the primary voltage regulator module 110, the bandgap reference module 120, and the output voltage regulator module 130 are connected in sequence. The primary voltage regulator module 110 can be connected to an external voltage, specifically to provide power to subsequent circuits. The bandgap reference module 120 can be connected to the aforementioned second reset signal. When the second reset signal is not connected, the bandgap reference module 120 operates normally. After the second reset signal is connected, a startup voltage is generated, which can be provided to the output voltage regulator module 130. The output voltage regulator module 130 can be connected to both a first reset signal and a third reset signal. When the first reset signal is connected, the output voltage regulator module 130 disconnects its output; when the third reset signal is connected, the output voltage regulator module 130 resumes its output.

[0055] Specifically, the first reset signal, the second reset signal, and the third reset signal can be generated sequentially. Correspondingly, for the linear voltage regulator circuit 100, these three reset signals can be received sequentially, specifically, the first reset signal can be received first, then the second reset signal, and finally the third reset signal.

[0056] The working principle of this linear voltage regulator will be explained below:

[0057] First stage: The signal generation circuit 200 generates a first reset electrical signal and sends the first reset electrical signal to the output voltage regulator module 130. The output voltage regulator module 130 disconnects the output according to the first reset electrical signal, so that the entire linear voltage regulator circuit 100 does not output voltage to the outside.

[0058] Second stage: Signal generation circuit 200 generates a second reset electrical signal and sends the second reset electrical signal to bandgap reference module 120. Bandgap reference module 120 can provide a start-up voltage to output voltage regulator module 130 according to the second reset electrical signal.

[0059] Third stage: The signal generation circuit 200 generates a third reset electrical signal and sends the third reset electrical signal to the output voltage regulator module 130. The output voltage regulator module 130 starts up under the start-up voltage provided by the bandgap reference module 120 and resumes output, so that it can output voltage to the linear voltage regulator circuit 100.

[0060] It should be noted that the voltage surge mainly occurs during the second reset signal input stage, which is the second stage mentioned above. During this stage, the output voltage regulator module 130 has not yet resumed output. Therefore, the voltage surge generated at this time will not affect other chips or components in the circuit.

[0061] In a linear voltage regulator device provided in this application embodiment, a signal generation circuit is connected to a linear voltage regulator circuit. The signal generation circuit provides multiple reset electrical signals to the linear voltage regulator circuit, which outputs a working voltage. A primary voltage regulator module is connected to a bandgap reference module, which is also connected to an output voltage regulator module. The output voltage regulator module disconnects its output based on a first reset electrical signal and also outputs a voltage based on a third reset electrical signal. The bandgap reference module provides a startup voltage to the output voltage regulator module based on a second reset electrical signal. The primary voltage regulator module provides the input voltage. Since the timing of the multiple reset electrical signals is not the same, the connection state of the output voltage regulator module can be controlled based on different reset electrical signals. This allows the output voltage regulator module to be disconnected when a voltage surge occurs, preventing the voltage surge from affecting the output. This avoids damage to chips or components due to exceeding the voltage range, further improving the lifespan of chips or components in the circuit.

[0062] The specific structural relationship of the bandgap reference module provided in the embodiments of this application will be explained in detail below.

[0063] Figure 2 For a schematic diagram of the bandgap reference module in the linear voltage regulator provided in this application embodiment, please refer to... Figure 2 The bandgap reference module includes a startup unit 121, which includes a startup switch S0, multiple resistors, and multiple capacitors. The bandgap reference module 120 is connected to the output voltage regulator module 130 through the startup unit 121. The startup switch S0 is turned on after receiving a second reset electrical signal, and the startup unit 121 is used to provide a startup voltage to the output voltage regulator module 130 after the startup switch S0 is turned on.

[0064] Optionally, the starting unit 121 may specifically include: a starting switch S0, a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2.

[0065] One end of the start switch S0 is connected to the other part of the bandgap reference module 120. The other end of the start switch S0 is connected to the first end of the first resistor R1, the first end of the second resistor R2, and the first end of the first capacitor C1. The second end of the first resistor R1 is connected to the second end of the first capacitor C1 and grounded. The second end of the second resistor R2 is also connected to the first end of the second capacitor C2. The second end of the second capacitor C2 is connected to the second end of the first capacitor C1 and grounded. The first end of the second capacitor C2 and the second end of the second resistor R2 are also connected to the output voltage regulator module 130.

[0066] When the start switch S0 receives the second reset electrical signal, it closes, causing the entire start unit 121 to provide start voltage to the output voltage regulator module 130.

[0067] In the linear voltage regulator device provided in this embodiment, the start switch can be turned on after receiving the second reset electrical signal, and the start unit provides a start voltage to the output voltage regulator module after the start switch is turned on. By providing a start voltage to the output voltage regulator module, the output voltage regulator module can be started normally in subsequent operation, thereby improving the stability of the entire circuit.

[0068] The specific structural relationship of the reference voltage module provided in the embodiments of this application will be explained in detail below.

[0069] Figure 3 For a schematic diagram of the reference voltage module in the linear voltage regulator provided in this application embodiment, please refer to... Figure 3 The linear voltage regulator circuit 100 also includes a reference voltage module 140.

[0070] The reference voltage module 140 is connected to the output terminal and is connected to a first reset electrical signal and a third reset electrical signal. The reference voltage module 140 is used to disconnect the output when the third reset electrical signal is received, and the reference voltage module 140 is also used to output voltage when the first reset electrical signal is received.

[0071] It should be noted that the reference voltage module 140 can be used to replace the output voltage regulator module 130 for output. Specifically, the reference voltage module 140 can provide an initial reference voltage, which can be a fixed value.

[0072] Optionally, the connection method between the reference voltage module 140 and the output terminal can be the opposite of the connection method between the output voltage regulator module 130 and the output terminal. Specifically, when the output voltage regulator module 130 is disconnected from the output terminal, the reference voltage module 140 is connected to the output terminal; correspondingly, when the output voltage regulator module 130 is reconnected to the output terminal, the reference voltage module 140 is disconnected from the output terminal.

[0073] Specifically, the reference voltage module 140 can also be connected to a first reset signal and a third reset signal. When the first reset signal is received, the module outputs voltage, and when the third reset signal is received, the output is disconnected.

[0074] Optionally, the reference voltage module 140 includes a first switch S1, which connects the reference voltage module 140 to the output terminal; the first switch S1 is turned on after receiving a first reset signal, and turned off after receiving a third reset signal.

[0075] It should be noted that the reference voltage module 140 also includes a power supply, multiple MOSFETs, multiple capacitors, and multiple resistors. For specific connection details, please refer to [link / reference]. Figure 3The reference voltage module 140 can provide an output voltage. After the first switch S1 receives the first reset signal, the output voltage can be output to the output terminal of the linear voltage regulator circuit 100. After the first switch S1 receives the third reset signal, the output can be disconnected.

[0076] In the linear voltage regulator provided in this embodiment, a reference voltage module can be connected to the output terminal. The reference voltage module can be connected to a first reset signal and a third reset signal. The reference voltage module can disconnect its output when it receives the third reset signal, and it can also output voltage when it receives the first reset signal. In this linear voltage regulator circuit, the reference voltage module can replace the output voltage regulator module in outputting voltage when the output voltage regulator module disconnects, and disconnect the reference voltage module after the output voltage regulator module resumes output. This improves the overall stability of the linear voltage regulator circuit and ensures the normal output of the linear voltage regulator.

[0077] The following section will explain the specific structural relationship of the output voltage regulator module in the linear voltage regulator provided in the embodiments of this application.

[0078] Figure 4 For a schematic diagram of the output voltage regulator module in the linear voltage regulator device provided in this application embodiment, please refer to... Figure 4 The output voltage regulator module 130 includes a second switch S2, which connects the output terminal to the output terminal. The second switch S2 is disconnected after receiving a first reset signal and turned on after receiving a third reset signal.

[0079] Optionally, the second switch S2 can be the opposite of the first switch S1. The second switch S2 will be turned off after receiving the first reset signal and turned on after receiving the third reset signal.

[0080] The output voltage regulator module 130 may also include multiple MOSFETs, multiple resistors, and capacitors. Please refer to the following for specific connection relationships. Figure 4 .

[0081] The specific structural relationship of the signal generation circuit in the linear voltage regulator provided in the embodiments of this application will be explained in detail below.

[0082] Figure 5 Please refer to the schematic diagram of the signal generation circuit provided in the embodiment of this application. Figure 5 The signal generation circuit 200 includes: a bias generation module 210, an oscillation module 220, and a reset signal generation module 230.

[0083] The bias generation module 210 is connected to the oscillation module 220. The bias generation module 210 generates a bias current and sends the bias current to the oscillation module 220. The oscillation module 220 is connected to the reset signal generation module 230. The oscillation module 220 generates an oscillation voltage based on the bias current and sends the oscillation voltage to the reset signal generation module 230. The reset signal generation module 230 is connected to the linear voltage regulator circuit 100. The reset signal generation module 230 generates multiple reset electrical signals with different timings based on the oscillation voltage and sends each reset electrical signal to the linear voltage regulator circuit 100 in sequence.

[0084] Optionally, the bias generation module 210 can generate a bias current based on its supply voltage, which flows into the oscillation module 220. The oscillation module 220 can be a ring oscillator, which generates an oscillation voltage of a corresponding waveform according to the input bias current, and can transmit the corresponding oscillation voltage to the reset signal generation module 230. The reset signal generation module 230 can divide the oscillation voltage and use multiple triggers to obtain multiple reset electrical signals with different timings in sequence, specifically the first reset electrical signal, the second reset electrical signal, and the third reset electrical signal mentioned above.

[0085] It should be noted that the reset signal generation module 230 may generate more than three reset electrical signals; for example, it can generate four reset electrical signals. The reset electrical signals input to the linear regulator circuit 100 only need to satisfy the corresponding timing relationship. For example, in sequence, reset electrical signals 1, 2, 3, and 4 can be generated. Reset electrical signal 1 can be used as the first reset electrical signal, reset electrical signal 2 as the second reset electrical signal, reset electrical signal 3 may not be input to the linear regulator circuit 100, and reset electrical signal 4 can be used as the third reset electrical signal. The specific configuration of multiple reset electrical signals can be based on actual needs and is not limited to the above example, as long as the corresponding timing relationship can be achieved.

[0086] The following explains another specific structural relationship of the signal generation circuit provided in the embodiments of this application.

[0087] Figure 6 For another schematic diagram of the signal generation circuit provided in the embodiments of this application, please refer to... Figure 6 The reset signal generation module 230 includes a frequency divider DIV and multiple flip-flops D; wherein, the frequency divider DIV is connected to the oscillation module 220, and the frequency divider DIV is used to perform frequency division processing on the received oscillation voltage; the multiple flip-flops D are connected to the frequency divider DIV in sequence, and the frequency divider DIV is used to send the frequency-divided oscillation voltage to each flip-flop D, and each flip-flop D is used to generate a reset electrical signal based on the frequency-divided oscillation voltage.

[0088] It should be noted that, Figure 6 Taking four flip-flops D as an example, in actual use, there can be more flip-flops D. Each flip-flop D can correspond to a reset signal. Based on the connection order, each reset signal can have a certain delay compared to the previous reset signal. Specifically, the output of the first flip-flop is the first reset signal, the output of the second flip-flop is the second reset signal, and the output of the fourth flip-flop is the third reset signal.

[0089] Specifically, the frequency divider DIV divides the input oscillation voltage. Furthermore, among multiple flip-flops D, one flip-flop D can be connected to the next flip-flop D.

[0090] It should be noted that the frequency divider DIV can specifically be a programmable frequency divider. A programmable frequency divider can divide the output frequency of a ring oscillator, and this frequency can be used to adjust the output delay of the oscillator.

[0091] Optionally, the signal generation circuit 200 further includes an initial reset module 240; the initial reset module 240 is connected to the frequency divider DIV and each flip-flop D respectively, and the initial reset module 240 is used to initialize and reset the frequency divider DIV and each flip-flop D.

[0092] Specifically, the initial reset module 240 can provide a reset signal to each module in the reset signal generation circuit, so that the frequency divider DIV and each flip-flop D can be initialized and reset.

[0093] It should be noted that the bias generation module 210 may include multiple MOSFETs and resistors; the oscillation module 220 may include multiple comparator MOSFETs; and the initial reset module 240 may include multiple MOSFETs and resistors.

[0094] For detailed connection relationships and the number of each component, please refer to [link / reference]. Figure 6 As shown, and, Figure 6 The diagram shows only one possible connection scheme. In actual implementation, it can be adapted to meet the specific circuit requirements. No restrictions are imposed here.

[0095] It should be noted that the bias current generated in the bias generation module 210 can be determined based on the drain current formula of the MOSFET.

[0096] The specific formula for drain current is as follows:

[0097] I = Kt(W / L)*(Vgs-Vth)2;

[0098] In the formula: Kt is the conductivity factor; W / L is the width-to-length ratio of the oxide layer; Vgs-Vth is the overdrive voltage. The magnitude of the bias current can be derived based on the specific structural relationship of the bias generation module and the drain current formula.

[0099] The specific formula for calculating Kt is as follows:

[0100] Kt = (1 / 2)UnCox;

[0101] Where Un is the electron migration rate; Cox is the gate oxide capacitance per unit area.

[0102] The specific structural and connection relationships of the electrical equipment provided in the embodiments of this application will be explained in detail below.

[0103] Figure 7 Please refer to the structural schematic diagram of the electrical equipment provided in the embodiments of this application. Figure 7 The electrical equipment includes a linear voltage regulator 20 and an electrical device 10 connected to the linear voltage regulator 20.

[0104] The electrical device 10 can be any device that requires the use of the linear voltage regulator 20 for power supply. The linear voltage regulator 20 and the electrical device 10 together constitute the electrical equipment.

[0105] In an embodiment of this application, an electrical device includes a linear voltage regulator. A signal generation circuit is connected to the linear voltage regulator circuit, which provides multiple reset signals to the linear voltage regulator circuit, which outputs a working voltage. A primary voltage regulator module is connected to a bandgap reference module, which is also connected to an output voltage regulator module. The output voltage regulator module disconnects its output based on a first reset signal and also outputs a voltage based on a third reset signal. The bandgap reference module provides a startup voltage to the output voltage regulator module based on a second reset signal. The primary voltage regulator module provides the input voltage. Since the timing of the multiple reset signals is different, the connection state of the output voltage regulator module can be controlled based on different reset signals. This allows the output voltage regulator module to be disconnected when a voltage surge occurs, preventing the voltage surge from affecting the output and thus avoiding damage to chips or components due to exceeding the voltage range. This further improves the lifespan of chips or components in the circuit.

[0106] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0107] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A linear voltage regulator, characterized in that, The application relates to a linear voltage stabilizing circuit and a signal generating circuit. The signal generating circuit is connected with the linear voltage stabilizing circuit, the signal generating circuit is used for providing multiple reset electric signals for the linear voltage stabilizing circuit, and the linear voltage stabilizing circuit is used for outputting working voltage. The linear voltage stabilizing circuit comprises a primary voltage stabilizing module, a band gap reference module and an output voltage stabilizing module. The primary voltage stabilizing module is connected with the band gap reference module, and the band gap reference module is further connected with the output voltage stabilizing module. The band gap reference module is connected with the second reset electric signal, the output voltage stabilizing module is connected with the first reset electric signal and the third reset electric signal, and the first reset electric signal, the second reset electric signal and the third reset electric signal are reset electric signals sent in time sequence. The output voltage stabilizing module is used for disconnecting output according to the first reset electric signal, and is further used for outputting voltage according to the third reset electric signal; the band gap reference module is used for providing starting voltage for the output voltage stabilizing module according to the second reset electric signal; and the primary voltage stabilizing module is used for providing input voltage. The signal generating circuit comprises a bias generating module, an oscillation module and a reset signal generating module. The bias generating module is connected with the oscillation module, and is used for generating bias current and sending the bias current to the oscillation module. The oscillation module is connected with the reset signal generating module, and is used for generating oscillation voltage according to the bias current and sending the oscillation voltage to the reset signal generating module. The reset signal generating module is connected with the linear voltage stabilizing circuit, and is used for generating multiple reset electric signals with different time sequences according to the oscillation voltage and sending each reset electric signal to the linear voltage stabilizing circuit in sequence. The band gap reference module comprises a starting unit, the starting unit comprises a starting switch, multiple resistors and multiple capacitors, and the band gap reference module is connected with the output voltage stabilizing module through the starting unit.

2. The linear voltage stabilizer according to claim 1, wherein The starting switch is used for being turned on after receiving the second reset electric signal, and the starting unit is used for providing starting voltage for the output voltage stabilizing module after the starting switch is turned on. The linear voltage stabilizing circuit further comprises a reference voltage module.

3. The linear voltage stabilizer according to claim 1, wherein The reference voltage module is connected with an output end, and is connected with the first reset electric signal and the third reset electric signal. The reference voltage module is used for disconnecting output when receiving the third reset electric signal, and is further used for outputting voltage when receiving the first reset electric signal. The reference voltage module comprises a first switch, and is connected with the output end through the first switch.

4. The linear voltage regulator of claim 3, wherein, The first switch is turned on after receiving the first reset signal, and is disconnected after receiving the third reset signal. The output voltage stabilizing module comprises a second switch, and is connected with the output end through the second switch.

5. The linear voltage regulator of claim 1, wherein, ​ The second switch is turned off when receiving a first reset signal, and is turned on when receiving a third reset signal.

6. The linear voltage regulator of claim 1, wherein, The reset signal generation module comprises a frequency divider and a plurality of flip-flops. The frequency divider is connected to the oscillation module, and is configured to perform frequency division on the received oscillation voltage. The plurality of flip-flops are connected to the frequency divider in sequence, and the frequency divider is configured to send the frequency-divided oscillation voltage to each flip-flop, and each flip-flop is configured to generate a reset signal based on the frequency-divided oscillation voltage.

7. The linear voltage regulator of claim 6, wherein, The signal generation circuit further comprises an initial reset module. The initial reset module is connected to the frequency divider and each flip-flop, and is configured to initialize the frequency divider and each flip-flop.

8. The linear voltage regulator of claim 1, wherein, The oscillation module comprises a ring oscillator configured to generate an oscillation voltage with a corresponding waveform according to an input bias current.

9. An electric device, characterized by The power-consuming device comprises the linear voltage stabilizer according to any one of claims 1-8 and a power-consuming device connected to the linear voltage stabilizer.

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