CN110187731B

CN110187731B - Power supply adjusting device and electronic equipment

Info

Publication number: CN110187731B
Application number: CN201910407247.8A
Authority: CN
Inventors: 李钊
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2021-12-17
Anticipated expiration: 2039-05-16
Also published as: CN110187731A

Abstract

The application provides a power adjusting device, which is characterized by comprising: the circuit comprises a first resistance circuit, a second resistance circuit and a control unit; the direct-current voltage input port is connected to the ground wire through the first resistance circuit and the second resistance circuit which are connected in series; the control unit is used for controlling the direct-current voltage input port to supply power to the digital circuit, or controlling a first port between the first resistance circuit and the second resistance circuit to supply power to the digital circuit. Through the mode, the voltage can be adjusted, the direct-current voltage suitable for the circuit is provided for different digital circuits, the power is supplied for the digital circuits, and meanwhile, the manufacturing cost is reduced.

Description

Power supply adjusting device and electronic equipment

Technical Field

The application relates to the technical field of power supplies, in particular to a power supply adjusting device and electronic equipment.

Background

Currently, many electronic devices use a Power Management Unit (PMU) to manage power. In an electronic device, the applicable voltage of electronic components provided by different manufacturers may be different. To reduce the limitation of product assembly, the mobile phone needs to be compatible with electronic components of different applicable voltages. Due to the limitation of PMU resources, only a limited number of voltage-adjustable power supply ports can be provided, and the voltage output of other ports is fixed and cannot be adjusted. A low dropout regulator (LDO) with adjustable voltage can be used to realize power supplies with different voltage values, but the LDO has a high cost.

Disclosure of Invention

The application provides a power supply regulating device can realize the regulation to mains voltage, for the digital circuit of difference provides the direct current voltage who suits this circuit, for the digital circuit power supply, simultaneously, reduces manufacturing cost.

In a first aspect, a power conditioning device is provided, comprising: the circuit comprises a first resistance circuit, a second resistance circuit and a control unit; the direct-current voltage input port is connected to the ground wire through the first resistance circuit and the second resistance circuit which are connected in series; the control unit is used for controlling the direct-current voltage input port to supply power to the digital circuit, or controlling a first port between the first resistance circuit and the second resistance circuit to supply power to the digital circuit.

Through the mode, the voltage can be adjusted, the direct-current voltage suitable for the circuit is provided for different digital circuits, the power is supplied for the digital circuits, and meanwhile, the manufacturing cost is reduced.

With reference to the first aspect, in certain implementations of the first aspect, the power supply regulation apparatus further includes a first controllable switching device, a second controllable switching device; the direct-current voltage input port is connected to the digital circuit through the first controllable switching device; the first port is connected to the digital circuit via the second controllable switching device; the control unit is configured to control the first controllable switching device to be turned on so that the dc voltage input port supplies power to the digital circuit, or control the second controllable switching device to be turned on so that the first port supplies power to the digital circuit.

With reference to the first aspect, in certain implementations of the first aspect, the first controllable switching device is a first Metal Oxide Semiconductor (MOS) transistor.

The function of the switch is realized through the MOS tube, so that the power consumption can be reduced.

With reference to the first aspect, in certain implementations of the first aspect, the power supply regulation device further includes a first capacitor, where one end of the first capacitor is connected to the first port, and the other end of the first capacitor is connected to the ground line, and is used to stabilize a voltage of the first port.

By adding a first capacitance between the first port and ground, the voltage at the first port can be stabilized. The first capacitor can also provide current for the digital circuit, and the signal turnover rate in the digital circuit is improved.

With reference to the first aspect, in certain implementations of the first aspect, the dc voltage input port is connected to a constant dc voltage port of a terminal device power management unit.

With reference to the first aspect, in certain implementations of the first aspect, the digital circuit is a digital circuit in a terminal device sensor.

With reference to the first aspect, in certain implementations of the first aspect, the digital circuit is a digital circuit in an image sensor of a terminal device.

With reference to the first aspect, in certain implementations of the first aspect, the first resistance circuit has a resistance value greater than 1 kiloohm.

By adopting a larger resistor, the influence of the digital circuit on the voltage of the first port is reduced, and the voltage stability of the first port is ensured. Meanwhile, the current flowing through the resistance circuit can be reduced, and the power consumption is reduced.

With reference to the first aspect, in certain implementations of the first aspect, a feature process size of the digital circuit is less than or equal to 130 nanometers.

The signal of the digital circuit changes, and the power supply in the digital circuit may need to charge the gate capacitance of part of the MOS transistors in the digital circuit. The process size of the digital circuit is small, so that the current in the power supply line is small, and the digital circuit hardly influences the output voltage of the power supply regulating device.

With reference to the first aspect, in certain implementations of the first aspect, the control unit is configured to control the dc voltage input port to supply power to the digital circuit or the first port to supply power to the digital circuit according to an identifier of the digital circuit

In a second aspect, an electronic device is provided, which includes a power management unit, a digital circuit, and the power conditioning device described above, wherein the power management unit supplies power to the dc voltage input port of the power conditioning device.

Drawings

Fig. 1 is a schematic structural diagram of an electronic device.

Fig. 2 is a schematic configuration diagram of a two-stage inverter.

Fig. 3 is a schematic structural diagram of a power supply regulation device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a power supply regulation device according to another embodiment of the present application.

Fig. 5 is a schematic flow chart of a method for power regulation according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a power management device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Terminal equipment in the embodiments of the present application may refer to user equipment, access terminals, subscriber units, subscriber stations, mobile stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or user devices. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication function, a computing device or other processing device connected to a Wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G Network or a terminal device in a future evolved Public Land Mobile Network (PLMN), and the like, which are not limited in this embodiment.

Fig. 1 is a schematic structural diagram of an electronic device. The electronic device 110 may be a terminal device.

The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identification Module (SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, a fingerprint sensor 180N, and the like.

It is to be understood that the illustrated structure of the embodiment of the present invention does not specifically limit the electronic device 100. In other embodiments of the present application, electronic device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The sensor module 180 of the electronic device 100 includes a variety of sensors. The working voltages of the sensors provided by different manufacturers may have a certain difference, and the optical sensor is taken as an example for illustration.

The optical sensor in the terminal equipment camera can sense an optical signal, and the optical signal is converted into an electric signal, so that an image is generated. The camera needs 3 power supply voltages to supply power, which are respectively an analog voltage AVDD for supplying power to an analog circuit, a core working voltage DVDD for supplying power to a core of the camera, and an input/output (IO) interface voltage VDDIO for supplying power to an IO interface. The core of the camera can be understood as the digital core of the camera sensor. The digital core is used for realizing the main digital operation function of the circuit. The AVDD voltage is typically 2.8V, and the VDDIO voltage is typically 1.8V. However, the DVDD voltage varies depending on the photosensor used, and is generally 1.05V, 1.1V, 1.2V, or the like. DVDD can be understood as the applicable voltage of the digital circuit, i.e. the normal operating voltage of the digital circuit. To reduce the limitation of product assembly, the mobile phone needs to be compatible with different light sensors.

The power management module 141 of the terminal device may also be called a Power Management Unit (PMU), and may be implemented by a power manager. The power management module 141 is generally configured with an adjustable power output port that can provide an adjustable voltage within a voltage range. But the number of ports for adjustable voltage is limited due to cost considerations. Currently, a low dropout regulator (LDO) with adjustable voltage is commonly used to implement power supplies with different voltage values. The LDO can realize the function of voltage reduction.

Under the condition that the PMU can not provide enough adjustable supply voltage, the voltage regulation is usually realized by adopting an external adjustable LDO (low dropout regulator), namely, an independent adjustable LDO is arranged in the terminal equipment, and the non-adjustable supply voltage provided by the PMU is connected to the independent adjustable LDO, so that the output adjustable supply voltage is obtained.

The LDO regulates the voltage drop of the regulating tube through feedback so as to stabilize the output voltage. The adjusting tube can be a MOS tube or a bipolar transistor, etc. The LDO adopts a complex circuit structure to realize stable voltage output. However, the LDO circuit has a complicated structure and a high cost. Meanwhile, the range of the output voltage of the LDO circuit is limited due to the limitation of the circuit structure adopted by the LDO.

In a digital circuit, a supply voltage is used to control a gate of a metal-oxide-semiconductor (MOS) transistor under normal operation of the circuit. That is, the gate capacitance of the MOS transistor is charged by connecting the gate capacitance of the MOS transistor to a power supply voltage. An inverter is a simple circuit structure in a digital circuit. The inverter includes N-channel MOS (NMOS) and P-channel MOS (PMOS). The case of a load connected to a power supply voltage in a digital circuit will be described by taking a two-stage inverter as an example.

Fig. 2 is a schematic configuration diagram of a two-stage inverter.

V1 is the control input voltage, when V1 is low, NMOS1 of the first-stage inverter is on, PMOS1 of the first-stage inverter is off, the power line is connected to the gates of NMOS2 and PMOS2 of the first-stage inverter, and V2 is high.

When V1 is high, PMOS1 of the first stage inverter is turned on, NMOS1 is turned off, the power line is no longer connected to the second stage inverter, and V2 is low.

With a constant control input voltage V1, no current flows on the supply line. When the control input voltage V1 changes from high level to low level, the power supply voltage charges the MOS gate capacitance of the second stage inverter, and current flows through the power supply line.

With the development of digital circuits, the size of a transistor is continuously reduced, the gate capacitance of the transistor is reduced due to the reduction of the area of the gate of the MOS transistor, and the current for charging the gate capacitance is small. Especially for handheld devices such as mobile phones, the process size of the digital circuits therein is small, and therefore the current in the power lines is small.

In order to reduce the cost of Direct Current (DC) -DC conversion, the application provides a power management circuit for supplying power to a component digital core of a terminal device.

Fig. 3 is a schematic structural diagram of a power supply regulation device provided in an embodiment of the present application.

The power supply adjusting device comprises a first resistance circuit, a second resistance circuit and a control unit.

The direct-current voltage input port is connected to the ground wire through the first resistance circuit and the second resistance circuit which are connected in series;

the control unit is used for controlling the direct-current voltage input port to supply power to the digital circuit, or controlling a first port between the first resistance circuit and the second resistance circuit to supply power to the digital circuit.

Through resistance voltage division, can realize the regulation of voltage, for different digital circuit provide the direct current voltage who adapts to this circuit, for digital circuit power supply, provide comparatively stable voltage. Meanwhile, the power supply adjusting device is simple to realize due to the fact that the number of elements is small, and manufacturing cost is reduced.

The power regulating device may further comprise a first controllable switching device, a second controllable switching device. A dc voltage input port is connected to the digital circuit via the first controllable switching device. The first port is connected to the digital circuit via said second controllable switching device. The control unit is used for controlling the first controllable switch device to be conducted so that the direct-current voltage input port supplies power to the digital circuit, or controlling the second controllable switch device to be conducted so that the first port supplies power to the digital circuit.

The first controllable switching device may be a MOS transistor or a bipolar transistor. The second controllable switch device may be a MOS transistor or a bipolar transistor. The MOS tube is a voltage-controlled device, and the control unit can control the on and off of the MOS tube by controlling the grid voltage of the MOS tube. The bipolar transistor is a flow control device, and the control unit can control the on and off of the bipolar transistor by controlling the base current of the bipolar transistor.

The output of the power management unit may include a constant dc voltage port and an adjustable dc voltage port. The output voltage of the constant dc voltage port is not adjustable. The output voltage of the adjustable direct current voltage port is adjustable.

The direct current voltage input port can be connected to a constant direct current voltage port of the terminal equipment power management unit, so that voltage regulation is realized.

The dc voltage input port may be connected to the adjustable dc voltage port of the terminal device power management unit, thereby extending the voltage range of the adjustable dc voltage port.

Optionally, the control unit may be configured to control the dc voltage input port to supply power to the digital circuit, or the first port to supply power to the digital circuit, according to an identifier of the digital circuit. From the identity of the digital circuit, the applicable voltage of the digital circuit may be determined.

For the power management device provided by the embodiment of the application, after the voltage division by the resistors, the voltage at the connection of the two resistors is used as the output voltage, and the output voltage may be affected by the load because the load is connected in parallel with the resistors.

In order to reduce the influence of the digital circuit on the voltage of the first port and ensure the voltage of the first port to be stable, the first resistor circuit and the second resistor circuit may use resistors with larger resistance values, for example, resistors in kilo-ohm level, that is, the first resistor circuit may use a resistor with a resistance value larger than 1 kilo-ohm. The resistor with larger resistance is adopted, and simultaneously, the current flowing through the resistor circuit can be reduced, and the power consumption is reduced.

The first resistance circuit may include a first resistance. The first resistor may be a chip resistor, or may be integrated with the first controllable switch device on the same chip.

The output of the power management device is used as the power supply voltage of the digital circuit, that is, the load of the power management device is the gate capacitance of a part of MOS tubes in the digital circuit. A capacitor corresponds to an open circuit for direct current.

The signal of the digital circuit changes, and the power supply in the digital circuit may need to charge the gate capacitance of part of the MOS transistors in the digital circuit. With the development of digital circuits, the size of transistors is continuously reduced, and the current for charging the gate capacitor is small. In order to realize the same function, the number of MOS tubes in the digital circuit is unchanged, and the total area of the digital circuit is reduced. The voltage fluctuations on the power supply line of the digital circuit may be referred to as ripples, the magnitude of which is small. The digital circuit has little effect on the output voltage of the power management device. For example, by properly setting the resistance values of the first and second resistors, the voltage fluctuation of the first port can be less than 100 mv, even less than 50 mv or 30 mv. Therefore, when the first port supplies power to the digital circuit, stable voltage can be provided.

Especially for handheld devices such as mobile phones, the process size of the digital circuits therein is continuously shrinking. Small electronic devices such as cell phones, cameras, etc. may include the digital circuitry. The digital circuit may be a sensor in a small electronic device such as a mobile phone or a camera, a digital module in a processor, etc., for example, a light sensor in a camera or other sensors and digital modules in a processor as shown in fig. 1. The digital circuit may be a digital integrated circuit, or a digital circuit in a digital-to-analog hybrid circuit. The feature process size of the digital circuit may be less than or equal to 0.13 microns, for example, the digital circuit may employ a 90 nanometer (nm) process, a 65nm process, a 55nm process, a 45nm process, a 32nm process, etc. Different feature process dimensions represent different process nodes, and may also be understood as feature dimensions, line spacing, line width, half pitch, physical gate length, process line width, and the like.

A first capacitor may be connected between the first port and ground, i.e. one end of the first capacitor is connected to the first port and the other end is connected to the ground. The first capacitor may be used to stabilize the voltage of the first port. The first capacitor can also provide current for the digital circuit, and the signal turnover rate in the digital circuit is improved. The first capacitor is large, so that the capacitor stores more charges and can provide larger current.

For a digital circuit, the gate voltage of an MOS tube can meet the normal turn-on and turn-off of the MOS tube, and the normal operation of the circuit can be ensured. The fluctuation of the small power supply voltage does not affect the digital circuit. Therefore, the requirement of normal operation of the digital circuit can be met by adopting a resistance voltage division mode.

In the case where a plurality of voltage values are required to be provided, the power supply regulating device may include a plurality of resistors connected in series, each node between two resistors being capable of providing one voltage value. Alternatively, the power conditioning device may include multiple voltage divider branches to provide multiple voltage values.

The control unit may be further configured to control the dc voltage input port or the first port to supply power to the digital circuit according to an identifier of the digital circuit. A specific method of power supply regulation can be seen in fig. 5.

Fig. 4 is a schematic structural diagram of a power supply regulation device provided in an embodiment of the present application. Fig. 4 is an example of a plurality of voltage dividing branches implementing a plurality of voltage values.

The power supply regulating device comprises resistors R1, R2, R3 and R4, and MOS transistors Q1, Q2 and Q3. The first voltage dividing branch comprises R1 and R2 which are connected in series, the second voltage dividing branch comprises R3 and R4 which are connected in series, and the first voltage dividing branch and the second voltage dividing branch are connected in parallel. One end of each voltage division branch is connected with the ground, and the other end of each voltage division branch is connected with the direct-current voltage output end of the PMU. The voltage output by the dc voltage output is not adjustable, i.e. the voltage does not change. The node between the first branch R1, R2 is connected to the output of the power conditioning device via Q3. The node between the second branch R3, R4 is connected to the output of the power conditioning device through Q2. And the on-off of the Q1, the Q2 and the Q3 is controlled, so that the voltage value provided by the output end is adjusted.

The chip can integrate the devices such as resistors R1, R2, R3 and R4, MOS transistors Q1, Q2 and Q3, and realize the connection of the devices. The processor may also be integrated in the chip.

The resistors R1, R2, R3 and R4 may be independent resistors, and the MOS transistors Q1, Q2 and Q3 may also be independent devices. The connection of the resistors R1, R2, R3 and R4 and the MOS transistors Q1, Q2 and Q3 in the power supply regulator can be realized by a Printed Circuit Board (PCB). The circuit is realized through the PCB, and the cost can be reduced.

The power supply regulating device can comprise a control module which can control the on-off of the Q1, the Q2 and the Q3. The control module may be a processor in the electronic device, such as a CPU of the electronic device.

Fig. 5 is a schematic flow chart of a method for voltage regulation according to an embodiment of the present application.

In step S501, the power supply regulator is controlled to supply voltage to the digital circuit. This voltage is used to identify the digital circuit. The digital circuit may be part of the sensor.

In step S502, an Identification (ID) of the digital circuit is detected.

The ID of the digital circuit may be used to distinguish the applicable voltage of the digital circuit, and any label that can determine the applicable voltage of the digital circuit may be considered an identification of the digital circuit. For example, if the sensor includes a digital circuit and the ID of the sensor can determine the applicable voltage of the digital circuit, the ID of the sensor can be considered as the ID of the digital circuit. Detecting the ID of a digital circuit is understood to mean detecting the ID of the sensor containing the digital circuit.

Referring to fig. 4, the PMU outputs a constant first voltage. The R1 and the R2 divide the first voltage and are used for outputting a second voltage. The R3 and the R4 divide the first voltage and output a third voltage. For example, the first voltage is 1.2V, the second voltage is 1.1V, and the third voltage is 1.05V.

At this time, the voltage for detecting the digital circuit ID may be any one of the first voltage, the second voltage, and the third voltage, and may be, for example, the smallest one of the first voltage, the second voltage, and the third voltage. When the ID cannot be identified, the other voltage value of the first voltage, the second voltage and the third voltage is used as the voltage for ID identification.

In step S503, the power supply adjusting device is controlled to supply a voltage corresponding to the digital circuit ID. The voltage corresponding to the digital circuit ID is the voltage applicable to the digital circuit.

Steps S501-S503 may be performed by a processor, for example, a Central Processing Unit (CPU) of the terminal device. For the power supply adjusting device adopting the proper voltage dividing resistor and the MOS tube, the automatic identification and the automatic switching of the voltage of the digital circuit can be realized through the steps S501-S503, namely the power supply voltage is automatically adapted to the requirement of the digital circuit, and the self-adaptation of the voltage is realized.

When different sensors are installed in the mobile phone, the mobile phone CPU controls an MOS tube in the power supply adjusting device through a general-purpose input/output (GPIO) pin according to the detected ID of the sensor, so that corresponding DVDD voltage is provided for the sensor.

When the 1.2V DVDD camera 1 is installed, the CPU detects the ID1 of the camera 1, the CPU controls the conduction of the Q1 tube through the GPIO1 connected with the Q1, and the 1.2V voltage output by the PMU supplies power to the camera 1. The camera 1 includes a 1.2V DVDD optical sensor.

When the camera 2 of 1.1V DVDD is installed, the CPU detects the ID2 of the camera 2, the CPU controls the conduction of a Q2 tube through the GPIO2 connected with the Q2, and according to the 1.2V voltage output by the PMU, the R1 and the R2 divide the voltage to generate the 1.1V voltage to supply power for the camera 2.

When a camera 3 of 1.05V DVDD is installed, the CPU detects the ID3 of the camera 3, the CPU controls the conduction of a Q3 tube through GPIO3 connected with Q3, and according to the 1.2V voltage output by the PMU, R3 and R4 divide the voltage to generate 1.05V voltage to supply power for the camera 3.

The power supply regulating device can provide voltage corresponding to the digital circuit in other modes.

The power supply regulating device can also sequentially provide voltage which can be provided by the power supply regulating device for the digital circuit to judge whether the digital circuit works normally. The voltage which can enable the digital circuit to work normally is set as the power supply voltage, namely the power supply adjusting device judges that the digital circuit works normally and outputs the voltage when the digital circuit works normally to supply power for the digital circuit.

The power supply regulating device provided by the embodiment of the application can solve the problem of adaptation of the LDO specification of the PMU and the core voltage of different digital circuits. No matter whether PMU's output voltage is adjustable, through selecting suitable divider resistance and MOS pipe, can both realize adaptation, convenient to use. In the existing electronic equipment, the voltage self-adaption of the digital power supply can be realized by adding a plurality of resistors and MOS (metal oxide semiconductor) tubes without occupying PMU (phasor measurement Unit) adjustable voltage output resources, and the digital power supply has the advantages of small hardware circuit change, flexible use and low cost.

Through the scheme, the problem of voltage adaptation of the digital circuit power supply when the PMU adjustable voltage output resource is insufficient can be well solved.

Besides the digital circuit in the sensor of the electronic device, other digital circuits with different requirements on voltage in the electronic device can also adopt the power supply regulating device provided by the embodiment of the application.

Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

The electronic device 600 includes a power management unit 610, a power conditioning device 620, and digital circuitry 630.

The power management unit supplies power to the direct-current voltage input port of the power regulating device. The power conditioning device 620 can be seen from the description of fig. 3 and 4.

The embodiment of the application also provides a power management device, which comprises a power management unit and a power regulation device. The power management unit may be configured to provide a stable dc voltage output, and the power adjustment device may be configured to adjust a voltage value of the dc voltage output provided by the power management unit. The power supply regulating device can be seen from the descriptions of fig. 3 and fig. 4.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A power regulating device, comprising: the circuit comprises a first resistance circuit, a second resistance circuit and a control unit;

the first resistance circuit is used for connecting a direct-current voltage input port; wherein the DC voltage input port is connected to ground via the first and second resistor circuits in series;

the control unit is used for controlling a plurality of detection ports to sequentially supply power to a digital circuit in the sensor until the identifier of the digital circuit can be identified, the plurality of detection ports comprise the direct-current voltage input port and a first port between the first resistance circuit and the second resistance circuit, and the characteristic process size of the digital circuit is smaller than or equal to 130 nanometers;

the control unit is further configured to control a first power supply port corresponding to the identifier of the digital circuit to supply power to the digital circuit according to a correspondence between the identifier and the power supply port, where the first power supply port is the dc voltage input port or the first port.

2. The power regulating device of claim 1, further comprising a first controllable switching device, a second controllable switching device;

the direct-current voltage input port is connected to the digital circuit through the first controllable switching device;

the first port is connected to the digital circuit via the second controllable switching device;

the control unit is configured to control the first controllable switching device to be turned on so that the dc voltage input port supplies power as the power supply port digital circuit, or control the second controllable switching device to be turned on so that the first port supplies power as the power supply port digital circuit.

3. The power supply regulation device of claim 2, wherein the first controllable switching device is a first Metal Oxide Semiconductor (MOS) transistor.

4. A power regulating device according to any of claims 1-3, further comprising a first capacitor having one end connected to the first port and the other end connected to the ground for stabilizing the voltage at the first port.

5. A power conditioning arrangement according to any of claims 1-3, characterized in that the dc voltage input port is connected to a constant dc voltage port of a terminal equipment power management unit.

6. A power regulating device according to any of claims 1-3, characterized in that the digital circuit is a digital circuit in a sensor of a terminal equipment.

7. A power regulating device as claimed in any one of claims 1 to 3, characterized in that the resistance value of the first resistive circuit is greater than 1 kiloohm.

8. An electronic device comprising a power management unit, a digital circuit, and a power regulating device as claimed in claims 1-7, the power management unit supplying power to the dc voltage input port of the power regulating device.