Analog signal output circuit, electrical stimulation device and electrical stimulation method

Abstract

The present invention relates to the technical field of electronic equipment, and provides an analog signal output circuit, an electrical stimulation device and an electrical stimulation method. The analog signal output circuit includes a boost voltage regulation module, a digital-to-analog module and an output electrode. The boost voltage regulation module includes a chip U2, a resistor R5, a resistor R6, a resistor R8, a transistor Q1 and a capacitor C9; a branch at the FB pin of the chip U2 is connected to the collector of the transistor Q1 through the resistor R6, the base of the transistor Q1 is connected in series with the resistor R8, the emitter of the transistor Q1 is grounded, and the capacitor C9 is connected in parallel between the collector and the emitter of the transistor Q1; another branch at the FB pin is connected to the power supply output terminal VCES through the resistor R5. The digital-to-analog module includes a chip U5, the VCC pin of the chip U5 is connected to the power supply output terminal VCES, the VOUT0 pin of the chip U5 is connected to the first plug of the output electrode; the VOUT1 pin of the chip U5 is connected to the second plug of the output electrode.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic devices and provides an analog signal output circuit, an electrical stimulation device and an electrical stimulation method. Background Art

[0002] In addition to a large amount of water, the human body also contains a lot of conductive electrolytes and non-conductive dielectrics. Therefore, the human body is actually a complex conductor with both resistance and capacitance properties. Applying low-intensity trace current to human skin can cause a certain sense of touch, and different people have different tactile needs.

[0003] The electrical stimulation devices currently on the market usually use digital circuits to control voltage switches to generate output signals. These output signals are relatively simple in form. For example, when electrical stimulation is combined with information notification, all types of information are output using the same current signal, which makes it difficult for users to quickly distinguish what kind of information they have received, and the user's self-setting capability is poor. At the same time, the current signal output by electrical stimulation is usually a square wave signal, which has very steep edges and quickly changes from one level to another. This sudden change in current and voltage causes energy to be concentratedly transferred to the user's body in a short period of time, which can easily cause the user to feel a tingling sensation. Summary of the invention

[0004] To solve the deficiencies in the above-mentioned prior art, the present invention provides an analog signal output circuit, including a boost voltage regulation module, a digital-to-analog module and an output electrode, wherein the digital-to-analog module is respectively connected to the boost voltage regulation module and the output electrode.

[0005] The boost voltage regulating module includes chip U2, resistor R5, resistor R6, resistor R8, transistor Q1 and capacitor C9; a branch at the FB pin of chip U2 is connected to the collector of transistor Q1 through resistor R6, the base of transistor Q1 is connected in series with resistor R8, the emitter of transistor Q1 is grounded, and capacitor C9 is connected in parallel between the collector and emitter of transistor Q1; another branch at the FB pin is connected to the power supply output terminal VCES through resistor R5.

[0006] The digital-to-analog module includes a chip U5, a capacitor C10 and a capacitor C11; the VCC pin of the chip U5 is connected to the power supply output terminal VCES of the boost and voltage regulation module; a branch at the VOUT0 pin of the chip U5 is connected in series with the capacitor C10 and then grounded, and another branch is connected to the first plug of the output electrode; a branch at the VOUT1 pin of the chip U5 is connected in series with the capacitor C11 and then grounded, and another branch is connected to the second plug of the output electrode.

[0007] In one embodiment, the first plug and the second plug of the output electrode are used to contact with human skin to provide electrical stimulation to the user.

[0008] In one embodiment, the boost voltage regulation module also includes a connector H2, an inductor L3 and a diode D43; the connector H2 is connected to an external battery, and pin 1 of the connector H2 is connected to the VIN pin of the chip U2 to supply power to the chip U2; the inductor L3 is connected in parallel between the VIN pin of the chip U2 and the SW pin of the chip U2, and the diode D43 is connected in series between the SW pin of the chip U2 and the power supply output terminal VCES.

[0009] In one embodiment, the model of chip U2 is SX1308.

[0010] In one embodiment, pin 1 of connector H2 is also connected to pin V5V of chip U5 to provide a logic reference voltage to chip U5.

[0011] In one embodiment, the A0 pin, the A1 pin, the A2 pin, and the GND pin of the chip U5 are all grounded.

[0012] In one embodiment, the model of chip U5 is GP8403.

[0013] The present invention also provides an electrical stimulation device, which adopts the analog signal output circuit as described above, and also includes an MCU controller which is communicatively connected to the boost and voltage regulation module and the digital-to-analog module respectively.

[0014] In one embodiment, the MCU controller includes a single-chip microcomputer U1, a PB6 pin of the single-chip microcomputer U1 is connected to an EN pin of a chip U2, a PB5 pin of the single-chip microcomputer U1 is connected to a base of a transistor Q1 through a resistor R8, a PC0 pin of the single-chip microcomputer U1 is connected to an SCLK pin of a chip U5, and a PC1 pin of the single-chip microcomputer U1 is connected to an SDA pin of a chip U5.

[0015] In one embodiment, the model of the single chip microcomputer U1 is FR8008A.

[0016] The present invention also provides an analog signal electrical stimulation method, using the analog signal output circuit as described above, comprising the following steps: S100, the user sets the required current value and current mode of the electrical stimulation signal; S200, transmitting the current value and the current mode to the analog signal output circuit; S300, the analog signal output circuit controls the output to conform to the set current value and current mode to ensure electrical stimulation; The current mode is the waveform, frequency, and amplitude of the current output signal.

[0017] In one embodiment, the electrical stimulation is single-point stimulation.

[0018] In one embodiment, the electrical stimulation is annular multi-point stimulation, and the annular multi-point stimulation has at least two points for electrical stimulation.

[0019] In one embodiment, the circular multi-point stimulation performs electrical stimulation in a clockwise or counterclockwise direction.

[0020] Based on the above, compared with the prior art, the analog signal output circuit provided by the present invention adopts a modular design, including a boost and voltage regulation module and a digital-to-analog module, wherein the boost and voltage regulation module can effectively increase the voltage of the input power supply to the required voltage level, and the digital-to-analog module can convert the digital signal into an analog signal, thereby realizing the optimization and adjustment of the output signal waveform, so that the user can obtain a more gentle and comfortable electrical stimulation experience.

[0021] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships shown in the drawings in the following description are based on the directions of the components drawn in the diagrams unless otherwise specified.

[0023] Figure 1 A flowchart of the electrical stimulation method of the analog signal provided by the present invention; Figure 2 A waveform diagram of the electrical stimulation signal provided by the present invention; Figure 3 A waveform diagram of another form of the electrical stimulation signal provided by the present invention; Figure 4 The electrical stimulation signal stimulation direction diagram provided by the present invention; Figure 5 Another stimulation direction diagram of the electrical stimulation signal provided by the present invention; Figure 6 A structural block diagram of an embodiment of an analog signal output circuit provided by the present invention; Figure 7 A circuit diagram of a boost and voltage regulation module of an embodiment of an analog signal output circuit provided by the present invention; Figure 8 for Figure 2 Internal schematic diagram of the middle chip U2; Fig. 9A circuit diagram of a digital-to-analog module of an analog signal output circuit according to an embodiment of the present invention; Fig.10 A circuit diagram of an MCU controller of an embodiment of an electrical stimulation device provided by the present invention; Fig.11 A key input control circuit and display logic circuit diagram of the MCU controller of an embodiment of the electric stimulation device provided by the present invention.

[0024] Reference numerals: DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that all terms (including technical terms and scientific terms) used in the present invention have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limitations on the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in this invention.

[0027] In actual use, in addition to being used as physical therapy, electrical stimulation can also be used as a method of signal transmission. However, in existing signal transmission through electrical stimulation, all information uses one form of electrical stimulation signal, making it impossible for users to distinguish between different information. For example, electrical stimulation can be used to notify a mobile phone of an incoming call, but in the prior art, all callers use the same form of square wave signal for electrical stimulation. On the one hand, users cannot distinguish who is calling, and on the other hand, square wave signals have very steep edges and quickly change from one level to another. This sudden change in current and voltage causes energy to be concentratedly transferred to the user's body in a relatively short period of time, which can easily cause the user to feel a tingling sensation.

[0028] In order to solve the above technical problems, the present invention provides an electrical stimulation method of analog signal, such as Figure 1 As shown, the following steps are included: S100, the user sets the required current value and current mode of the electrical stimulation signal; S200, transmitting the current value and the current mode to the analog signal output circuit; S300, the analog signal output circuit controls the output to conform to the set current value and current mode to ensure single-point electrical stimulation; The current pattern is the waveform, frequency and amplitude of the electrical stimulation signal.

[0029] Specifically, the user can set it through the app or through the button of the electrical stimulation device itself. After the current value and current mode of the electrical stimulation signal are set, the current value and current mode are transmitted to the analog signal output circuit to set the reference value of the analog signal output circuit. At this time, the analog signal output circuit outputs the current value and current mode of the electrical stimulation signal set corresponding to the information received.

[0030] The current mode includes the waveform, frequency and amplitude of the electrical stimulation signal. Figure 2 As shown, the current mode can be a square wave signal. It can also be Figure 3 The sine wave signal is shown, and the frequency and amplitude of the sine wave signal are adjustable by the user.

[0031] In one embodiment, the electrical stimulation is single-point stimulation.

[0032] Specifically, the electrical stimulation can be single-point stimulation, that is, there is only one current sensing contact, and the waveform of the electrical stimulation can be as follows: Figure 2 As shown, the current mode can be a square wave signal. It can also be Figure 3 The sine wave signal shown in FIG. 1 is a sine wave signal, and the frequency and amplitude of the sine wave signal are adjustable by the user. When it is a single-point stimulation, different information is transmitted through signals with different waveforms.

[0033] In one embodiment, the electrical stimulation is annular multi-point stimulation, and the annular multi-point stimulation has at least two points for electrical stimulation.

[0034] Specifically, for multi-point stimulation, a circle of stimulation points can be set inside the ring, with no less than two, and the specific number can be determined according to actual conditions. Figure 2 As shown, the current mode can be a square wave signal. It can also be Figure 3 The sine wave signal is shown, and the frequency and amplitude of the sine wave signal are adjustable by the user.

[0035] Furthermore, the circular multi-point stimulation performs electrical stimulation in a clockwise or counterclockwise direction.

[0036] Specifically, the waveform of the electrical stimulation can be as follows Figure 4 The waveform of the electrical stimulation can also be as follows: Figure 5The counterclockwise form shown is presented in the ring multi-point stimulation. When it is multi-point stimulation, different information is transmitted by combining the stimulation direction and the waveform signal. And the contacts are not electrically stimulated in a clockwise or counterclockwise manner, and the contact jump operation can also be performed.

[0037] The present invention provides an electrical stimulation method of an analog signal, and the user can set the current value and current mode of different electrical stimulation signals according to different information set by the user, so as to facilitate the distinction of different information; in addition, the user can set the appropriate current value and current mode of the electrical stimulation signal according to his own tactile sense, so that the electrical stimulation form is gentler and more in line with the user's own tactile needs.

[0038] Specifically, an analog signal output circuit used in the present invention is shown in FIG. Figure 6 , including a boost and voltage regulation module 100, a digital-to-analog module 200 and an output electrode 300, wherein the digital-to-analog module 200 is connected to the boost and voltage regulation module 100 and the output electrode 300 respectively.

[0039] The boost voltage regulating module 100 includes a chip U2, a resistor R5, a resistor R6, a resistor R8, a transistor Q1 and a capacitor C9; a branch at the FB pin of the chip U2 is connected to the collector of the transistor Q1 through the resistor R6, the base of the transistor Q1 is connected in series with the resistor R8, the emitter of the transistor Q1 is grounded, and the capacitor C9 is connected in parallel between the collector and the emitter of the transistor Q1; another branch at the FB pin is connected to the power supply output terminal VCES through the resistor R5.

[0040] The digital-to-analog module 200 includes a chip U5, a capacitor C10 and a capacitor C11; the power supply output terminal VCES of the boost and voltage regulation module 100 is connected to the VCC pin of the chip U5; a branch at the VOUT0 pin of the chip U5 is connected in series with the capacitor C10 and then grounded, and another branch is connected to the first plug of the output electrode 300; a branch at the VOUT1 pin of the chip U5 is connected in series with the capacitor C11 and then grounded, and another branch is connected to the second plug of the output electrode 300.

[0041] When implementing it, Figure 7-9 As shown, in the boost voltage regulation module 100, a branch at the FB pin of the chip U2 is connected to the collector of the transistor Q1 through a resistor R6, the base of the transistor Q1 is connected in series with a resistor R8, and the emitter of the transistor Q1 is grounded. Capacitor C9 is connected in parallel between the collector and the emitter of the transistor Q1 to play a filtering role, reduce the ripple and noise of the current signal, and improve the stability of the output voltage. Another branch at the FB pin is connected to the power supply output terminal VCES through a resistor R5. The resistor R5 is used to limit the current flowing through the FB pin of the chip U2 and control the voltage at the FB pin, thereby affecting the stability and range of the voltage at the power supply output terminal VCES.

[0042] The working principle of the boost voltage regulation module 100 is as follows: the FB pin of the chip U2 has a preset reference voltage value. At the moment when the transistor Q1 is turned on, the voltage at the FB pin will be less than the reference voltage value. The chip U2 has a negative feedback loop inside, so the switching frequency of the SW pin will increase, thereby increasing the voltage value of the power supply output terminal VCES. After the voltage value of the power supply output terminal VCES increases, the current flowing through the resistors R5, R6, and the transistor Q1 also increases, and the voltage at the FB pin of the chip U2 returns to the reference voltage value, maintaining a constant current output, and the boost function is completed at this time. In this embodiment, the reference voltage value at the FB pin is 0.6V.

[0043] The power supply output terminal VCES of the boost and voltage regulation module 100 is connected to the VCC pin of the chip U5, and the boosted current signal is input into the digital-to-analog module 200 to supply power to the chip U5. A branch at the VOUT0 pin of the chip U5 is connected in series with the capacitor C10 and then grounded, and another branch is connected to the first plug of the output electrode 300, and the converted first analog current signal is transmitted to the output electrode 300. Similarly, a branch at the VOUT1 pin of the chip U5 is connected in series with the capacitor C11 and then grounded, and another branch is connected to the second plug of the output electrode 300, and the converted second analog current signal is transmitted to the output electrode 300. Among them, the capacitor C10 and the capacitor C11 both play a filtering role. The first plug and the second plug of the output electrode 300 are used to contact with human skin to provide electrical stimulation to the user. Preferably, the first plug and the second plug each have an electrical stimulation contact, and only one of the first plug and the second plug outputs electrical stimulation at a time. Preferably, the first plug and the second plug may also be provided with a plurality of electrical stimulation contacts, and when the first plug and the second plug cooperate, the plurality of electrical stimulation contacts may rotate clockwise or counterclockwise.

[0044] Preferably, the boost and voltage regulating module 100 also includes a connector H2, an inductor L3 and a diode D43; the connector H2 is connected to an external battery, and pin 1 of the connector H2 is connected to the VIN pin of the chip U2 to supply power to the chip U2; the inductor L4 is connected in parallel between the VIN pin of the chip U2 and the SW pin of the chip U2, and the diode D43 is connected in series between the SW pin of the chip U2 and the power supply output terminal VCES.

[0045] When implementing it, Figure 7 , 8As shown, preferably, the model of chip U2 is SX1308. SX1308 is a chip with high-efficiency low-voltage amplifier characteristics, mainly used in boost circuits. The chip can help increase the voltage of the battery or other low-voltage devices to the required level to meet the operating voltage requirements of other components in the circuit. Specifically, when the VIN pin of the SX1308 chip receives the input voltage, the SW pin starts to work and periodically applies the input voltage to the inductor L3. At the beginning of each cycle, the SW pin is closed and the inductor L3 stores a certain amount of electrical energy; and at the end of each cycle, the SW pin is opened, and the inductor L3 releases the stored electrical energy, which is transmitted to the power supply output terminal VCES through the diode D43, thereby achieving a voltage increase.

[0046] It should be noted that the chip U2 is not limited to the model selected in this embodiment. The chip U2 can also be other chips of the same type, such as MT3608, SDB628, MT3540, HX3608, etc., all of which fall within the protection scope of the present invention.

[0047] Preferably, pin 1 of connector H2 is also connected to pin V5V of chip U5 to provide a logic reference voltage to chip U5.

[0048] When implementing it, Fig. 9 As shown, pin 1 of connector H2 is connected to the V5V pin of chip U5 to ensure the normal operation of chip U5 and provide a stable logic level. Normally, the V5V pin is a power supply pin for the internal logic circuit of the chip. Connecting the logic reference voltage can ensure that the internal logic circuit of chip U5 can work normally and ensure the stability and reliability of the chip.

[0049] Preferably, the A0 pin, A1 pin, A2 pin and GND pin of the chip U5 are all grounded.

[0050] When implementing it, Fig. 9 As shown, the A0, A1 and A2 pins of chip U5 are usually used as address lines to select different functions inside the chip or address different memory cells. Connecting these address lines to ground can set the address of chip U5 to 0, thereby determining the starting address of chip U5.

[0051] In this embodiment, the preferred chip U5 is GP8403. GP8403 is an I2C signal to analog signal converter, i.e., DAC. In this embodiment, chip U5 is used to convert digital current signals into analog current signals, optimize and adjust the output signal waveform, so that users can obtain a more gentle and comfortable electrical stimulation experience. Of course, other chips that can convert digital current signals into analog current signals, such as AD421BRZRL, MCP4728-E / UN, XL5615, BU2506FV-E2, etc., also fall within the scope of protection of the present invention.

[0052] The present invention also provides an electrical stimulation device, which adopts the analog signal output circuit as described above, and also includes an MCU controller which is communicatively connected to the boost and voltage regulation module 100 and the digital-to-analog module 200 respectively.

[0053] The MCU controller includes a single-chip microcomputer U1, a PB6 pin of the single-chip microcomputer U1 is connected to an EN pin of a chip U2, a PB5 pin of the single-chip microcomputer U1 is connected to a base of a transistor Q1 through a resistor R8, a PC0 pin of the single-chip microcomputer U1 is connected to an SCLK pin of a chip U5, and a PC1 pin of the single-chip microcomputer U1 is connected to an SDA pin of a chip U5.

[0054] During specific implementation, the MCU controller is communicatively connected with the boost and voltage regulation module 100 and the digital-to-analog conversion module 200, and its function is to control and adjust the working status and parameters of each module. The MCU controller includes a single-chip microcomputer U1. Preferably, the model of the single-chip microcomputer U1 is FR8008A. Preferably, the model of the single-chip microcomputer U1 is FR8008A. It should be noted that the single-chip microcomputer U1 is not limited to the model selected in the present embodiment. In fact, the single-chip microcomputer U1 can also be other single-chip microcomputers commonly used in MCU controllers in the art, including but not limited to the 8051 series, cotex m0 series, cotex m0+ series, cotex m1 series, cotex m3 series and cotex m4 series, etc., all fall within the protection scope of the present invention. Fig.10 As shown, the PB6 pin of the microcontroller U1 is used as a GPIO (general input and output) pin of the microcontroller U1, which is connected to the EN pin of the chip U2 to control the enable (EN) signal of the chip U2. The PB5 pin of the microcontroller U1 is also used as a GPIO pin, which is connected to the base of the transistor Q1 through the resistor R8 to control or adjust the switching frequency of the transistor Q1. The PC0 pin of the microcontroller U1 is used as the output pin of the serial clock signal (SCLK) and is connected to the SCLK pin of the chip U5 to input the digital current signal into the chip U5. The PC1 pin of the microcontroller U1 is used as the output pin of the serial data signal (SDA) and is connected to the SDA pin of the chip U5 for I2C (Inter-Integrated Circuit) communication to input the digital current signal into the chip U5.

[0055] In some embodiments, the MCU controller also includes a switch reset circuit, an antenna RF1, a crystal oscillator circuit, a programming download interface circuit, a key input control circuit, and a display logic circuit. The switch reset circuit is used for initialization when the system starts, the antenna RF1 is used for wireless communication, the crystal oscillator circuit is used to generate a clock signal, the programming download interface circuit is used for burning and updating the program, the key input control circuit is used for user interaction, and the display logic circuit is used to drive the display to display related content. The combination of these circuits can meet the needs of different application scenarios. The circuit connection relationship is as follows: Fig.10 , 11 As shown, no further details are given here.

[0056] In summary, compared with the prior art, the analog signal output circuit provided by the present invention has the following advantages: 1. The boost and voltage regulator module can effectively increase the voltage of the input power supply to the required voltage level.

[0057] 2. The digital-to-analog module can convert digital signals into analog signals, optimize and adjust the output signal waveform, and enable users to obtain a more gentle and comfortable electrical stimulation experience.

[0058] 3. The single-chip computer U1 communicates with the chip U2 and the chip U5, realizing the intelligent control and function expansion of the electric stimulation device.

[0059] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0060] Although the terms such as boost voltage regulator module, digital-to-analog module, output electrode, chip, resistor, transistor, capacitor, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An analog signal output circuit, characterized in that: include: A boost and voltage regulation module (100), a digital-to-analog module (200) and an output electrode (300), wherein the digital-to-analog module (200) is connected to the boost and voltage regulation module (100) and the output electrode (300) respectively; The boost voltage regulation module (100) comprises a chip U2, a resistor R5, a resistor R6, a resistor R8, a transistor Q1 and a capacitor C9; a branch at the FB pin of the chip U2 is connected to the collector of the transistor Q through the resistor R6, the base of the transistor Q1 is connected in series with the resistor R8, the emitter of the transistor Q1 is grounded, and the capacitor C9 is connected in parallel between the collector and the emitter of the transistor Q1; another branch at the FB pin is connected to the power supply output terminal VCES through the resistor R5; The digital-to-analog module (200) comprises a chip U5, a capacitor C10 and a capacitor C11; the VCC pin of the chip U5 is connected to the power supply output terminal VCES of the boost voltage regulation module (100); a branch at the VOUT0 pin of the chip U5 is connected in series with the capacitor C10 and then grounded, and another branch is connected to the first plug of the output electrode (300); a branch at the VOUT1 pin of the chip U5 is connected in series with the capacitor C11 and then grounded, and another branch is connected to the second plug of the output electrode (300).

2. The analog signal output circuit according to claim 1, characterized in that: The first plug and the second plug of the output electrode (300) are used to contact human skin to provide electrical stimulation to the user.

3. The analog signal output circuit according to claim 1, characterized in that: The boost voltage regulation module (100) further comprises a connector H2, an inductor L3 and a diode D43; the connector H2 is externally connected to a battery, and pin 1 of the connector H2 is connected to the VIN pin of the chip U2 to supply power to the chip U2; the inductor L3 is connected in parallel between the VIN pin of the chip U2 and the SW pin of the chip U2, and the diode D43 is connected in series between the SW pin of the chip U2 and the power supply output terminal VCES.

4. The analog signal output circuit according to claim 3, characterized in that: Pin 1 of the connector H2 is also connected to the V5V pin of the chip U5 to provide a logic reference voltage to the chip U5.

5. An electrical stimulation device, characterized in that: The analog signal output circuit according to any one of claims 1 to 4 further comprises an MCU controller which is communicatively connected to the boost and voltage regulation module (100) and the digital-to-analog conversion module (200) respectively.

6. The electrical stimulation device according to claim 5, characterized in that: The MCU controller includes a single-chip microcomputer U1, a PB6 pin of the single-chip microcomputer U1 is connected to the EN pin of the chip U2, a PB5 pin of the single-chip microcomputer U1 is connected to the base of the transistor Q1 through the resistor R8, a PC0 pin of the single-chip microcomputer U1 is connected to the SCLK pin of the chip U5, and a PC1 pin of the single-chip microcomputer U1 is connected to the SDA pin of the chip U5.

7. An electrical stimulation method of analog signal, characterized in that: The analog signal output circuit according to any one of claims 1 to 4 comprises the following steps: S100, the user sets the required current value and current mode of the electrical stimulation signal; S200, transmitting the current value and current mode to an analog signal output circuit; S300, the analog signal output circuit controls the output to conform to the set current value and current mode to ensure electrical stimulation; The current mode is the waveform, frequency and amplitude of the current output signal.

8. The electrical stimulation method of analog signal according to claim 7, characterized in that: The electrical stimulation is single-point stimulation.

9. The electrical stimulation method of analog signal according to claim 7, characterized in that: The electrical stimulation is annular multi-point stimulation, and the annular multi-point stimulation has at least two points for electrical stimulation.

10. The electrical stimulation method of analog signal according to claim 8, characterized in that: The annular multi-point stimulation performs electrical stimulation in a clockwise or counterclockwise direction.

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