Functional circuit, circuit board, and electronic device

Abstract

The application discloses a functional circuit, a circuit board and an electronic device, and relates to the technical field of electronic devices. The functional circuit comprises an inductor module, a driving module and a detection point, the driving module is electrically connected to the primary coil side or the secondary coil side of the inductor module, and the driving module can emit a target signal; the detection point is arranged on the primary coil side or the secondary coil side which is not electrically connected to the driving module, and is used for detachably connecting a detection device; and the detection point can generate and emit an induction result formed by the primary coil side or the secondary coil side connected to the detection point in response to the target signal, so that the detection device can display the induction result.

Description

Technical Field

[0001] This application relates to the field of electronic equipment technology, and more particularly to a functional circuit, circuit board, and electronic equipment. Background Technology

[0002] Currently, when designing the structure of a trans-inductor voltage regulator (TLVR), it is usually necessary to be compatible with the power supply architecture of a common inductor. This requires that the external dimensions of the TLVR must be consistent with those of a traditional common inductor to adapt to a common printed circuit board (PCB), combining significant dynamic performance advantages and cost advantages.

[0003] However, the distance between the two adjacent pins in the middle of the TLVR is small, making it difficult to detect short circuits. This increases the failure rate of TLVR soldering and seriously affects the overall performance of the device. Utility Model Content

[0004] The first aspect of this application provides a functional circuit, which includes:

[0005] Inductor module;

[0006] A driving module, which is electrically connected to the primary coil side or the secondary coil side of the inductor module, is capable of emitting a target signal;

[0007] The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection of the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result.

[0008] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the primary coil side includes a compensation inductor and a plurality of primary coils connected in series.

[0009] The secondary coil side includes a plurality of secondary coils connected in parallel, and the secondary coils are arranged corresponding to the primary coil;

[0010] Wherein, the driving module is electrically connected between the compensation inductor and the primary coil, and the detection points are set at both ends of any of the secondary coils; or

[0011] The drive module is electrically connected to any of the secondary coils, and the detection points are located at both ends of the compensation inductor.

[0012] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the driving module includes the voltage regulator and the waveform conversion module;

[0013] The voltage regulator is capable of emitting a unidirectional square wave signal;

[0014] The waveform conversion module is electrically connected to the voltage regulator to convert the square wave signal into the target signal, which is an AC signal with a specified frequency.

[0015] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the waveform conversion module includes a first capacitor and a first inductor connected in series;

[0016] The first capacitor is electrically connected to the voltage regulator and the first inductor, and the first inductor is electrically connected to the primary coil side or the secondary coil side of the inductor module.

[0017] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the waveform conversion module includes a first resistor and a second capacitor connected in series.

[0018] The first resistor is electrically connected to the voltage regulator and the second capacitor, and the second capacitor is grounded.

[0019] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the waveform conversion module includes a waveform conversion chip;

[0020] The waveform conversion chip is electrically connected to the voltage regulator to convert the square wave signal into an AC signal.

[0021] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the driving module further includes a conduction control structure;

[0022] The conduction control structure is disposed between the voltage regulator and the waveform conversion module, and the conduction control structure can control the conduction state between the voltage regulator and the waveform conversion module.

[0023] In some modified embodiments of the first aspect of this application, the aforementioned functional circuit, wherein the conduction control structure includes a switch; or

[0024] The conduction control structure includes a second resistor, which is detachably disposed between the voltage regulator and the waveform conversion module.

[0025] A second aspect of this application provides a circuit board comprising:

[0026] Circuit board body;

[0027] A functional circuit is disposed on the circuit board body, and the functional circuit includes an inductor module, a drive module, and detection points;

[0028] The driving module is electrically connected to the primary coil side or the secondary coil side of the inductor module, and the driving module can emit a target signal;

[0029] The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection to the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result.

[0030] A third aspect of this application provides an electronic device comprising:

[0031] The electronic device itself;

[0032] A circuit board, which is disposed within the electronic device body, includes a circuit board body and functional circuits;

[0033] The functional circuit is disposed on the circuit board body, and the functional circuit includes an inductor module, a drive module, and detection points;

[0034] The driving module is electrically connected to the primary coil side or the secondary coil side of the inductor module, and the driving module can emit a target signal;

[0035] The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection to the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result. Attached Figure Description

[0036] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0037] Figure 1 A schematic diagram of a first structural representation of the functional circuit provided in an embodiment of this application is shown.

[0038] Figure 2 A schematic diagram of a second structural representation of the functional circuit provided in an embodiment of this application is shown.

[0039] Figure 3 A schematic diagram of a third structure of the functional circuit provided in the embodiments of this application is shown.

[0040] The reference numerals in the attached diagram are as follows: Inductor module 1, primary coil 11, secondary coil 12, drive module 2, voltage regulator 21, waveform conversion module 22, first capacitor 221, first inductor 222, first resistor 223, second capacitor 224, conduction control structure 23, second resistor 24, detection point 3, detection equipment 4, compensation inductor 5. Detailed Implementation

[0041] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0042] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0043] It should be noted that in the description of this specification, the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application; the terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships, such as A and / or B. Specifically, it can be understood as: A and B can be included at the same time, A can exist alone, or B can exist alone, and any of the above three situations can be met.

[0046] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0047] Example 1

[0048] Reference Appendix Figure 1 The functional circuit provided in this application embodiment includes an inductor module 1, a driving module 2, and a detection point 3. The driving module 2 is electrically connected to the primary coil side or the secondary coil side of the inductor module 1, and the driving module 2 can emit a target signal. The detection point 3 is located on the secondary coil side or the primary coil side that is not electrically connected to the driving module 2, and is used for detachably connecting to the detection device 4. The detection point 3 can generate and emit a sensing result formed by the secondary coil side or the primary coil side connected to the detection point 3 in response to the target signal, so that the detection device 4 can display the sensing result.

[0049] Specifically, to address the technical problem of short circuits being easily caused by the small space between the two middle pins of the primary coil in a TLVR, which makes short circuits difficult to detect and increases the soldering failure rate of the TLVR, seriously affecting the overall performance, the functional circuit provided in this embodiment utilizes the coupling effect between the primary coil 11 and the secondary coil 12. A drive module 2 is set on one side of the inductor module 1 to transmit the target signal, and a detection point 3 is set on the other side of the inductor module 1. This allows the detection device 4 to detect and display the induction result in response to the target signal through the detection point 3, thereby determining whether a short circuit fault has occurred on the specified coil side. This pre-detection of faults avoids power-on startup under faulty conditions, reducing potential safety risks. Furthermore, this functional circuit allows electronic devices equipped with it to be tested on the production line or during user operation, expanding the scope of use and improving the user experience.

[0050] The functional circuits provided in this embodiment can be applied, but are not limited to, in fields such as servers, computers, game consoles, automated robots, graphics processing, and autonomous driving of electric vehicles.

[0051] Among them, inductor module 1 can be a TLVR (Trans-Inductor Voltage Regulator) inductor module. TLVR inductor modules can synchronize the phases of the inductors of a multiphase voltage regulator through cross-inductance coupling technology, achieving rapid and uniform current distribution. They are often used to improve transient response speed and reduce output capacitor requirements; see attached diagram. Figure 1 Inductor module 1 may include multiple TLVR inductors, such as eight or more. Each TLVR inductor has a transformer structure consisting of a primary winding on the left and a secondary winding on the right. For multiple TLVR inductors, the primary winding side can be formed as multiple primary coils 11 connected in series, and the secondary winding side can be formed as multiple secondary coils 12 connected in parallel. The secondary coils 12 and primary coils 11 can be... Figure 1 The one-to-one form shown can also be a many-to-one form; the primary winding and secondary winding form a coupled inductor network. Figure 1 The triangle symbol in the middle represents the grounding terminal; the above content about TLVR is easy for those skilled in the art to understand, and will not be elaborated further here. Correspondingly, the actual physical form of the TLVR inductor is similar to that of a conventional inductor, at least in terms of size, to accommodate a general-purpose circuit board. While conventional inductors have two pins connecting to the circuit board, the TLVR inductor requires four pins to be led out from the same location. These four pins are spaced apart in a straight line. The first and fourth pins can serve as the secondary coil 12, and the second and third pins as the primary coil 11. Due to limited space, the second and third pins are prone to bridging during soldering, which can cause a short circuit in the primary coil 11. If this occurs and the circuit board is powered on, it will cause damage. Furthermore, since the second and third pins are soldered onto the circuit board, it is impossible to lead out detection lines, making detection extremely inconvenient. Therefore, in this embodiment, the mutual coupling between the primary coil 11 and the secondary coil 12 is utilized. The drive module 2 can be placed on the primary coil 11 side and correspondingly detected on the secondary coil side, or the drive module 2 can be placed on the secondary coil side and correspondingly detected on the primary coil 11 side, so that detection can be performed at least before the circuit board or electronic device leaves the factory, ensuring product quality.

[0052] The driving module 2 can send a target signal, i.e., an electrical signal, to the inductor module 1, such as an AC signal. The driving module 2 can be a chip structure that can emit a sine wave, such as a Direct Digital Frequency Synthesis (DDS) chip or a transmitter chip that can perform frequency modulation. The driving module 2 sends an AC signal to the primary coil 11 or the secondary coil 12. When a short circuit occurs on the primary coil side, no induction result will occur. Conversely, when there is no short circuit on the primary coil 11, an induction result will occur. The induction result can include, but is not limited to, an induced voltage or an induced waveform. Accordingly, the detection device 4 can be a voltage transformer, a detector, etc. Specifically, when the drive module 2 is set on the primary coil side, it can be directly connected to both ends of the series circuit on the primary coil side. In this case, the detection point 3 can be set at both ends of a secondary coil 12 according to the detection needs. Under this setting, if a primary coil 11 is short-circuited, its corresponding secondary coil 12 will not be able to couple to generate an induction waveform, while other primary coils 11 that are not short-circuited can be normally coupled to their corresponding secondary coils 12. When the drive module 2 is set on the secondary coil side, it can be set at the input end or input end of a secondary coil 12, and the detection point 3 can be set at both ends of any primary coil 11. Under this setting, if a primary coil 11 is short-circuited, after sending a target signal to its corresponding secondary coil 12, no induction waveform will be generated at the detection point 3. Correspondingly, other normal primary coils 11 that are not short-circuited can generate an induction waveform at the detection point 3 when coupled by the secondary coil 12. Of course, in this embodiment, the drive module 2 needs to be powered on to transmit the target signal. It can directly utilize the power supply on its circuit board, or a separate power supply line can be introduced for the drive module 2. This configuration is easily understood and implemented by those skilled in the art, and will not be elaborated further here. In this embodiment, the drive module 2 is set up in conjunction with the TLVR inductor module 1, that is, on the same circuit board. Not only can the circuit board or equipment be tested before leaving the factory, but users can also test it themselves during use. This not only enables testing in the production line environment but also accommodates self-testing in the user's operating environment, improving user experience and reducing subsequent repair costs.

[0053] In this embodiment, detection point 3 can be set up in groups for each TLVR inductor. That is, one point is set between the secondary coil 12 and VIN, and another point is set between the secondary coil 12 and VOUT. Both points are connected to the detection device 4 to form a detection loop. It is easy to understand that for different TLVR inductors, the detection device 4 can be connected to different detection points 3 to obtain individual detection results. In this embodiment, for the detection point 3 on the secondary coil side, the connection terminals of the TLVR itself with VIN and VOUT can be used as detection points 3, which simplifies the circuit structure design and reduces design and molding costs.

[0054] As listed above, the functional circuit provided in this application can detect short circuits in the primary coil 11 of the inductor module 1 without directly turning on the inductor module 1 by setting the drive module 2 and the detection point 3, thereby improving detection efficiency and ensuring product yield. The drive module 2 and the functional circuit are set on the same circuit board, which can not only realize detection in the production line environment, but also take into account the user's self-detection environment. This solves the technical problem that short circuits between the two middle pins of the primary coil in the TLVR are difficult to detect, which increases the soldering failure rate of the TLVR and seriously affects the performance of the whole machine.

[0055] Further, see attached document. Figure 1 In this embodiment, the functional circuit includes a primary coil side comprising a compensation inductor (Lc) 5 connected in series and a plurality of primary coils 11; and a secondary coil side comprising a plurality of secondary coils 12 connected in parallel, wherein the secondary coils 12 are correspondingly arranged with respect to the primary coils 11. The driving module 2 is electrically connected between the compensation inductor (Lc) 5 and the primary coils 11, and the detection point 3 is located at both ends of any of the secondary coils 12; or the driving module 2 is electrically connected to any of the secondary coils 12, and the detection point 3 is located at both ends of the compensation inductor (Lc) 5.

[0056] It is understandable that, in order to realize the detection function of the TLVR inductor corresponding to the functional circuit, the primary coil side can be set in the form of a compensation inductor (Lc) 5 in this embodiment. The compensation inductor (Lc) 5 is connected in series with multiple primary coils 11 to achieve the effects of suppressing ripple current, phase equalization, and transient response optimization. This setting can be easily understood by those skilled in the art based on the existing TLVR architecture design. Correspondingly, when the drive module 2 is connected to the primary coil side, it can be connected between the first primary coil 11 and the compensation inductor (Lc) 5, or when there is a special detection requirement for a certain primary coil 11, it can be connected between the specific primary coil 11 and the compensation inductor (Lc) 5. Correspondingly, the detection point 3 can be set for each secondary coil 12, and the position of the detection device 4 can be changed. Correspondingly, when the drive module 2 is set on the secondary coil side, it can be electrically connected to a certain secondary coil 12 according to the detection needs. It can be between the secondary coil 12 and VIN or between the secondary coil 12 and VOUT. Correspondingly, the detection point 3 can be set at both ends of the compensation inductor (Lc) 5.

[0057] Further, see attached document. Figure 1 In the specific implementation of the functional circuit provided in this embodiment, the driving module 2 includes the voltage regulator 21 and the waveform conversion module 22; the voltage regulator 21 is capable of emitting a unidirectional square wave signal; the waveform conversion module 22 is electrically connected to the voltage regulator 21 to convert the square wave signal into the target signal, the target signal being an AC signal with a specified frequency.

[0058] It is understood that, in order to enable the drive module 2 to emit an AC signal with a specified frequency, the drive module 2 in this embodiment can be configured to include a voltage regulator (VR) 21 and a waveform conversion module 22. The specified frequency here is high frequency, which can be, but is not limited to, 1K, 10K, 100K, etc., and can be designed and adjusted as needed to ensure the high-frequency response and visual clarity of the induced waveform after coupling. The voltage regulator (VR) 21 contains a switching element. During the switching process, the voltage at the switching node switches between zero and the power supply voltage at a high frequency, thereby forming a square wave. This is easily understood and implemented by those skilled in the art and will not be elaborated upon here. The waveform conversion module 22 can convert the square wave into a sinusoidal AC wave. In this embodiment, the waveform conversion module 22 can be a single device or a combined component. Correspondingly, this embodiment provides at least the following three configuration methods:

[0059] The first method, see attached document. Figure 1The waveform conversion module 22 may include a first capacitor 221 and a first inductor 222 connected in series. The first capacitor 221 is electrically connected to the voltage regulator 21 and the first inductor 222, and the first inductor 222 is electrically connected to the primary coil side or the secondary coil side of the inductor module 1. In this configuration, the first capacitor 221 and the first inductor 222 form an LC resonator, which can utilize the energy storage characteristics and resonance phenomenon of the inductor and capacitor to filter out high-frequency harmonic components in the square wave and retain the fundamental frequency sine wave component to output a sine wave or a waveform that is very close to a sine wave. In this configuration, the inductor and capacitor have extremely low losses during operation, thereby effectively improving detection efficiency and reducing signal loss.

[0060] The second method is detailed in the appendix. Figure 2 The waveform conversion module 22 may include a first resistor 223 and a second capacitor 224 connected in series. The first resistor 223 is electrically connected to the voltage regulator 21 and the second capacitor 224, and the second capacitor 224 is grounded. In this configuration, the first resistor 223 and the second capacitor 224 are connected in series to form an RC filter circuit, which can filter out high-frequency harmonics in the square wave and retain the fundamental frequency sine wave component, thereby outputting a sine wave or a waveform that is very close to a sine wave. This configuration can use the most basic and lowest-priced electronic components, such as resistors and capacitors, which is suitable for mass production and reduces costs.

[0061] Thirdly, the waveform conversion module 22 may include a waveform conversion chip (not shown in the figure); the waveform conversion chip is electrically connected to the voltage regulator 21 to convert the square wave signal into an AC signal. In this configuration, the waveform conversion chip may be, but is not limited to, a dedicated waveform conversion chip, a D / A conversion chip, an SPWM (Sinusoidal PulseWidth Modulation) control chip, i.e., a pure sine wave SPWM chip, etc.; in this configuration, the waveform conversion module 22 is a single chip, with a simple structure, concise form, and convenient and efficient installation.

[0062] Further, see attached document. Figure 1 and attached Figure 3 In the specific implementation of the functional circuit provided in this embodiment, the driving module 2 further includes a conduction control structure 23; the conduction control structure 23 is disposed between the voltage regulator 21 and the waveform conversion module 22, and the conduction control structure 23 can control the conduction state between the voltage regulator 21 and the waveform conversion module 22.

[0063] It is understandable that, in order to achieve the controllability of the functional circuit, a conduction control structure 23 is set in this embodiment to control whether or not detection is performed. When the conduction control structure 23 conducts the voltage regulator 21 and the waveform conversion module 22, the target signal will be sent to the primary coil 11 for coupling induction. It is easy to understand that the conduction control structure 23 has the function of a switch. When detection is required, it is turned on to realize the conduction of the line, and when detection is not required, it is turned off to disconnect the line connection. In this embodiment, the conduction control structure 23 can be configured as a switch structure, such as a DIP switch. Alternatively, the conduction control structure 23 can include a second resistor 24, which is detachably disposed between the voltage regulator 21 and the waveform conversion module 22. This makes the second resistor 24 a device with switching functionality. When detection is required, the second resistor 24 is connected to the circuit to achieve circuit conduction; when detection is not required, the second resistor 24 is removed to achieve circuit disconnection. The detachability of the second resistor 24 can be achieved by setting detachable solder points or by using a pluggable connector. This configuration is easily understood by those skilled in the art and will not be elaborated upon here. In this embodiment, the first resistor 223 can be configured as a detachable form to form the second resistor 24, reducing the number of structural components, simplifying the circuit structure, and lowering design costs.

[0064] Example 2

[0065] This embodiment provides a circuit board including a circuit board body and a functional circuit. The functional circuit is disposed on the circuit board body and includes an inductor module 1, a driving module 2, and a detection point 3. The driving module 2 is electrically connected to the primary coil side or the secondary coil side of the inductor module 1 and can emit a target signal. The detection point 3 is disposed on the secondary coil side or the primary coil side not electrically connected to the driving module 2 and is used for detachable connection to a detection device 4. The detection point 3 can generate and emit a sensing result formed by the secondary coil side or the primary coil side connected to the detection point 3 in response to the target signal, so that the detection device 4 can display the sensing result.

[0066] It is understood that the circuit board provided in this embodiment can be applied, but is not limited to, in fields such as servers, computers, game consoles, automated robots, graphics processing, and autonomous driving of electric vehicles. The functional circuit provided in this embodiment is the same as the functional circuit described in Embodiment 1. Its structure and working principle are detailed in Embodiment 1 and will not be elaborated further here.

[0067] Example 3

[0068] This embodiment provides an electronic device, which includes an electronic device body and a circuit board. The circuit board is disposed within the electronic device body and includes a circuit board body and a functional circuit. The functional circuit is disposed on the circuit board body and includes an inductor module 1, a drive module 2, and a detection point 3.

[0069] The driving module 2 is electrically connected to the primary coil side or the secondary coil side of the inductor module 1, and the driving module 2 can emit a target signal; the detection point 3 is set on the secondary coil side or the primary coil side that is not electrically connected to the driving module 2, and is used to detachably connect to the detection device 4. The detection point 3 can generate and emit the induction result formed by the secondary coil side or the primary coil side connected to the detection point 3 in response to the target signal, so that the detection device 4 can display the induction result.

[0070] It is understood that the electronic device provided in this embodiment may be, but is not limited to, a server, a computer, a game console, an automated work robot, a graphics processing system, autonomous driving for electric vehicles, etc. The circuit board provided in this embodiment is the same as the circuit board described in Embodiment 2. Its structure and working principle are described in detail in Embodiment 2 and will not be repeated here.

[0071] The above description is merely a specific embodiment 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.

Claims

1. A functional circuit, characterized in that, It includes: Inductor module; A driving module, which is electrically connected to the primary coil side or the secondary coil side of the inductor module, is capable of emitting a target signal; The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection of the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result.

2. The functional circuit according to claim 1, characterized in that: The primary coil side includes a compensating inductor and several primary coils connected in series. The secondary coil side includes a plurality of secondary coils connected in parallel, and the secondary coils are arranged corresponding to the primary coil; Wherein, the driving module is electrically connected between the compensation inductor and the primary coil, and the detection points are set at both ends of any of the secondary coils; or The drive module is electrically connected to any of the secondary coils, and the detection points are located at both ends of the compensation inductor.

3. The functional circuit according to claim 1, characterized in that: The drive module includes the voltage regulator and the waveform conversion module; The voltage regulator is capable of emitting a unidirectional square wave signal; The waveform conversion module is electrically connected to the voltage regulator to convert the square wave signal into the target signal, which is an AC signal with a specified frequency.

4. The functional circuit according to claim 3, characterized in that: The waveform conversion module includes a first capacitor and a first inductor connected in series. The first capacitor is electrically connected to the voltage regulator and the first inductor, and the first inductor is electrically connected to the primary coil side or the secondary coil side of the inductor module.

5. The functional circuit according to claim 3, characterized in that: The waveform conversion module includes a first resistor and a second capacitor connected in series. The first resistor is electrically connected to the voltage regulator and the second capacitor, and the second capacitor is grounded.

6. The functional circuit according to claim 3, characterized in that: The waveform conversion module includes a waveform conversion chip; The waveform conversion chip is electrically connected to the voltage regulator to convert the square wave signal into an AC signal.

7. The functional circuit according to claim 3, characterized in that: The drive module also includes a conduction control structure; The conduction control structure is disposed between the voltage regulator and the waveform conversion module, and the conduction control structure can control the conduction state between the voltage regulator and the waveform conversion module.

8. The functional circuit according to claim 7, characterized in that: The conduction control structure includes a switch; or The conduction control structure includes a second resistor, which is detachably disposed between the voltage regulator and the waveform conversion module.

9. A circuit board, characterized in that, It includes: Circuit board body; A functional circuit is disposed on the circuit board body, and the functional circuit includes an inductor module, a drive module, and detection points; The driving module is electrically connected to the primary coil side or the secondary coil side of the inductor module, and the driving module can emit a target signal; The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection of the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result.

10. An electronic device, characterized in that, It includes: The electronic device itself; A circuit board, which is disposed within the electronic device body, includes a circuit board body and functional circuits; The functional circuit is disposed on the circuit board body, and the functional circuit includes an inductor module, a drive module, and detection points; The driving module is electrically connected to the primary coil side or the secondary coil side of the inductor module, and the driving module can emit a target signal; The detection point is located on the secondary coil side or primary coil side that is not electrically connected to the drive module, and is used for detachable connection of the detection device. The detection point can generate and emit a sensing result formed by the secondary coil side or primary coil side connected to the detection point in response to the target signal, so that the detection device can display the sensing result.

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