A system, method and device for determining spectrum characteristics of a power supply circuit

Abstract

The embodiment of the present invention provides a system, method and device for determining the frequency spectrum characteristics of a power supply circuit. The system includes: a power supply circuit, a signal generator, a data processing device and an oscilloscope; the data processing device controls the signal generator to couple with the power supply end of the power supply circuit multiple times to generate a wave signal, and the two probes of the oscilloscope are configured to respectively collect the wave signals at the power supply end and the load end of the power supply circuit, and transmit the collected wave signals to the data processing device, and the data processing device determines the frequency spectrum characteristics of the power supply circuit according to the wave signals collected by the two probes; in this solution, the wave signal generated by the signal generator coupling with the power supply end includes a high-frequency component, that is, there is no need for the power supply end to directly generate a high-frequency signal, which reduces the hardware performance requirements and also reduces the equipment cost.

Description

Technical Field

[0001] The present invention relates to the field of power supply technology, and in particular to a system, method and device for determining frequency spectrum characteristics of a power supply loop. Background Art

[0002] Testing power integrity means confirming whether the voltage and current at the power source and destination meet the requirements. In the process of testing power integrity, it is necessary to determine the impact of the power supply circuit on the power supply, mainly to determine the relationship between the impedance of the power supply circuit and the power supply frequency, that is, to determine the spectrum characteristics of the power supply circuit.

[0003] In some related solutions, voltage signals of different frequencies are usually generated at the power supply end to determine the impedance change of the power supply circuit under signals of different frequencies and obtain the spectrum characteristics of the power supply circuit. However, in this solution, a high-frequency voltage signal needs to be generated at the power supply end, which places high requirements on the hardware performance of the power supply end, resulting in a high equipment cost for this solution. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a system, method and device for determining the spectrum characteristics of a power supply loop, so as to reduce the equipment cost.

[0005] To achieve the above-mentioned purpose, an embodiment of the present invention provides a system for determining the spectrum characteristics of a power supply circuit, comprising: a power supply circuit, a signal generator, a data processing device and an oscilloscope; wherein,

[0006] The power supply circuit includes a power supply end and a load end;

[0007] The signal generator is connected to the power supply end of the power supply circuit and the data processing device respectively; the signal generator is configured to couple with the power supply end to generate wave signals for multiple times under the control of the data processing device, each wave signal has an edge, and the edge frequency of each wave signal is different;

[0008] The first probe of the oscilloscope is connected to the power supply end, the second probe of the oscilloscope is connected to the load end, the oscilloscope is also connected to the data processing device, the first probe is configured to collect the wave signal of the power supply end and transmit it to the data processing device, and the second probe is configured to collect the wave signal of the load end and transmit it to the data processing device;

[0009] The data processing device is configured to obtain the amplitude and edge frequency of the wave signal at the power supply end each time according to the wave signal at the power supply end collected by the first probe, and obtain the amplitude and edge frequency of the wave signal at the load end each time according to the wave signal at the load end collected by the second probe;

[0010] The data processing device is also configured to determine the frequency spectrum characteristics of the power supply loop according to the amplitude and edge frequency of the wave signal occurring each time at the power supply end, and the amplitude and edge frequency at the load end.

[0011] Optionally, the signal generator is connected to the power supply end of the power supply circuit via a transmission line, the signal generator is connected to the data processing device via a data line, and the data processing device is connected to the oscilloscope via a data line.

[0012] Optionally, the wave signal is a triangular wave signal;

[0013] The edge is a falling edge, and the duration of the falling edge in the wave signals occurring each time is different; or, the edge is a rising edge, and the duration of the rising edge in the wave signals occurring each time is different.

[0014] Optionally, the data processing device is configured to:

[0015] For each wave signal that occurs, obtain the first wave signal collected by the first probe and the second wave signal collected by the second probe; determine the edge frequency of the first wave signal as the first frequency; determine the amplitude of the first wave signal as the first amplitude; determine the edge frequency of the second wave signal as the second frequency; determine the amplitude of the second wave signal as the second amplitude; calculate the frequency difference between the first frequency and the second frequency, and calculate the amplitude difference between the first amplitude and the second amplitude, respectively, as the frequency difference and amplitude difference corresponding to the wave signal that occurs this time; determine the frequency spectrum characteristics of the power supply circuit according to the frequency difference and amplitude difference corresponding to the wave signal that occurs each time.

[0016] Optionally, the data processing device is configured to:

[0017] In a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the points corresponding to the wave signal occurring each time are determined respectively, the horizontal coordinate of the point is the frequency difference corresponding to the wave signal occurring this time, and the vertical coordinate of the point is the amplitude difference corresponding to the wave signal occurring this time; by fitting the determined points, a curve characterizing the frequency spectrum characteristics of the power supply circuit is generated.

[0018] To achieve the above object, an embodiment of the present invention further provides a method for determining a spectrum characteristic of a power supply circuit, comprising:

[0019] The signal generator is coupled with the power supply end of the power supply circuit for multiple times to generate a wave signal. Each wave signal generated has an edge, and the edge frequency of each wave signal generated is different.

[0020] For each wave signal that occurs, the wave signal that occurs is collected at the power supply end and the load end respectively, and the amplitude and edge frequency of the wave signal that occurs at the power supply end, and the amplitude and edge frequency of the wave signal that occurs at the load end are obtained;

[0021] The frequency spectrum characteristics of the power supply circuit are determined according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency at the load end.

[0022] Optionally, the wave signal is a triangular wave signal;

[0023] The edge is a falling edge, and the duration of the falling edge in the wave signals occurring each time is different; or, the edge is a rising edge, and the duration of the rising edge in the wave signals occurring each time is different.

[0024] Optionally, for each occurrence of the wave signal, the wave signal generated each time is collected at the power supply end and the load end respectively to obtain the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency of the wave signal generated each time at the load end, including:

[0025] For each wave signal that occurs, the wave signal that occurs is collected at the power supply end and the load end respectively to obtain a first wave signal collected at the power supply end and a second wave signal collected at the load end; an edge frequency of the first wave signal is determined as a first frequency; an amplitude of the first wave signal is determined as a first amplitude; an edge frequency of the second wave signal is determined as a second frequency; and an amplitude of the second wave signal is determined as a second amplitude;

[0026] The method further includes: calculating a frequency difference between the first frequency and the second frequency, and calculating an amplitude difference between the first amplitude and the second amplitude, as the frequency difference and amplitude difference corresponding to the wave signal generated this time, respectively;

[0027] Determining the spectrum characteristics of the power supply circuit according to the amplitude and edge frequency of the wave signal occurring each time at the power supply end, and the amplitude and edge frequency at the load end, comprises:

[0028] The frequency spectrum characteristics of the power supply circuit are determined according to the frequency difference and amplitude difference corresponding to the wave signal generated each time.

[0029] Optionally, determining the spectrum characteristics of the power supply circuit according to the frequency difference and amplitude difference corresponding to the wave signal generated each time includes:

[0030] In a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the points corresponding to the wave signals occurring each time are determined respectively, the horizontal coordinate of the points being the frequency difference corresponding to the wave signals occurring this time, and the vertical coordinate of the points being the amplitude difference corresponding to the wave signals occurring this time;

[0031] By fitting the determined points, a curve representing the frequency spectrum characteristics of the power supply loop is generated.

[0032] To achieve the above object, an embodiment of the present invention further provides a device for determining a spectrum characteristic of a power supply circuit, comprising:

[0033] The wave signal generating module is configured to generate a wave signal by coupling with the power supply end of the power supply circuit through the signal generator for multiple times, and each wave signal generated has an edge, and the edge frequency of each wave signal generated is different;

[0034] The acquisition module is configured to collect the wave signal generated each time at the power supply end and the load end, respectively, to obtain the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency of the wave signal generated each time at the load end;

[0035] The determination module is configured to determine the spectrum characteristics of the power supply loop according to the amplitude and edge frequency of the wave signal occurring each time at the power supply end, and the amplitude and edge frequency at the load end.

[0036] By applying the embodiment shown in the present invention, a wave signal is generated by coupling a signal generator with the power supply end of the power supply circuit for multiple times. Each wave signal generated has an edge, and the edge frequency of the wave signal generated each time is different. It can be seen from the Fourier expansion that the wave signal with an edge includes a high-frequency component, which is equivalent to a high-frequency wave signal. Then, the frequency spectrum characteristics of the power supply circuit are determined according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, as well as the amplitude and edge frequency at the load end. It can be seen that in this solution, the wave signal generated by the coupling of the signal generator with the power supply end includes a high-frequency component, so there is no need for the power supply end to directly generate a high-frequency signal, which reduces the hardware performance requirements and also reduces the equipment cost.

[0037] Of course, it is not necessary to achieve all of the advantages described above at the same time to implement any product or method of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of the structure of a system for determining a spectrum characteristic of a power supply circuit provided by an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of the connection relationship between a power supply end and a signal generator of a power supply circuit provided in an embodiment of the present invention;

[0041] Figure 3a A schematic diagram of a wave signal provided by an embodiment of the present invention;

[0042] Figure 3b A schematic diagram of comparing wave signals collected at a power supply end and a load end provided by an embodiment of the present invention;

[0043] Figure 4 Another schematic diagram of comparing wave signals collected at a power supply end and a load end provided by an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of a curve representing the frequency spectrum characteristics of a power supply circuit provided in an embodiment of the present invention;

[0045] Figure 6 A schematic flow chart of a method for determining a spectrum characteristic of a power supply circuit provided by an embodiment of the present invention;

[0046] Figure 7 A schematic diagram of the structure of a device for determining a frequency spectrum characteristic of a power supply circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the present invention.

[0048] In order to achieve the above objectives, the embodiments of the present invention provide a system, method and device for determining the spectrum characteristics of a power supply circuit. The system for determining the spectrum characteristics of a power supply circuit is first introduced in detail below.

[0049] Figure 1A schematic diagram of the structure of a system for determining the spectrum characteristics of a power supply circuit provided by an embodiment of the present invention includes: a power supply circuit 100, a signal generator 200, a data processing device 300 and an oscilloscope 400; wherein,

[0050] The power supply circuit 100 includes a power supply terminal 110 and a load terminal 120;

[0051] The signal generator 200 is connected to the power supply terminal 110 of the power supply circuit 100 and the data processing device 300 respectively; the signal generator 200 is configured to couple with the power supply terminal 110 to generate a wave signal multiple times under the control of the data processing device 300, and each wave signal generated has an edge, and the edge frequency of each wave signal generated is different;

[0052] The first probe 410 of the oscilloscope 400 is connected to the power supply terminal 110 of the power supply circuit 100, the second probe 420 of the oscilloscope 400 is connected to the load terminal 120 of the power supply circuit 100, and the oscilloscope 400 is also connected to the data processing device 300. The first probe 410 is configured to collect the wave signal of the power supply terminal 110 and transmit it to the data processing device 300, and the second probe 420 is configured to collect the wave signal of the load terminal 120 and transmit it to the data processing device 300;

[0053] The data processing device 300 is configured to obtain the amplitude and edge frequency of the wave signal at the power supply end 110 each time according to the wave signal at the power supply end 110 collected by the first probe 410, and obtain the amplitude and edge frequency of the wave signal at the load end 120 each time according to the wave signal at the load end 120 collected by the second probe 420;

[0054] The data processing device 300 is further configured to determine the frequency spectrum characteristics of the power supply loop 100 according to the amplitude and edge frequency of the wave signal at the power supply end 110 and the amplitude and edge frequency at the load end 120 each time it occurs.

[0055] In one implementation, the signal generator 200 is connected to the power supply terminal 110 of the power supply circuit 100 via a transmission line, the signal generator 200 is connected to the data processing device 300 via a data line, and the data processing device 300 is connected to the oscilloscope 400 via a data line.

[0056] The signal generator 200 is coupled with the power supply terminal 110 to generate a wave signal, so the signal generator 200 and the power supply terminal 110 can be connected through a transmission line, such as a 50Ω transmission line; some data information is transmitted between the signal generator 200 and the data processing device 300, and between the data processing device 300 and the oscilloscope 400, so they can be connected through a data line. The specific transmission line and data line models are not limited. Or in other implementations, other connection methods can also be used between the various components of the system, and the specific connection method is not limited.

[0057] For example, the power supply circuit 100 in the embodiment of the present invention may be a power supply circuit in a PCBA (Printed Circuit Board Assembly). The power supply terminal 110 of the power supply circuit 100 may be a DC power supply, and the cost of a DC power supply is relatively low. The signal generator 200 may generate a periodic AC wave, such as a triangular wave or a square wave, etc., and the specific waveform is not limited, but the AC wave has an edge, such as a rising edge or a falling edge. The wave signal formed by coupling the periodic AC wave generated by the signal generator 200 and the DC wave generated by the power supply terminal 110 is still a periodic AC wave, and the wave signal formed by coupling is similar to the shape of the AC wave generated by the signal generator 200, but the wave signal formed by coupling has greater energy than the AC wave generated by the signal generator 200. The wave signal formed by coupling may be a triangular wave signal or a square wave signal, and the specific shape of the wave signal is not limited, but the wave signal has an edge, such as a rising edge or a falling edge. The signal generator 200 is coupled with the power supply terminal 110 to generate a wave signal, and compared with the AC power supply directly generating a wave signal with an edge and sufficient energy, the equipment cost is relatively low.

[0058] The specific connection between the power supply terminal 110 of the power supply circuit 100 and the signal generator 200 can be referred to Figure 2 As shown, the power supply terminal 110 includes a power line interface 111 and a ground line interface 112, and the signal generator 200 includes a signal line interface 210 and a ground line interface 220. The power line interface 111 of the power supply terminal 110 is connected to the signal line interface 210 of the signal generator 200 through a capacitor, and the ground line interface 112 of the power supply terminal 110 is connected to the ground line interface 220 of the signal generator 200. The capacitor plays a role in blocking direct current and passing alternating current, so that the alternating current wave generated by the signal generator 200 can flow to the power supply terminal 110, but the direct current wave generated by the power supply terminal 110 cannot flow to the signal generator 200. In addition, the power line interface 111 in the power supply terminal 110 can be connected to the positive pole of the power supply device, and the ground line interface 112 in the power supply terminal 110 can be connected to the negative pole of the power supply device.

[0059] Take the triangular wave signal formed by coupling as an example, refer to Figure 3aAs shown, the period of the triangular wave signal is t 2 -t 0 =T, the waveform frequency is about tens of megahertz, and the falling edge duration of the triangle wave signal is t 2 -t 1 =ΔT, ΔT can be controlled by the data processing device 300. ΔT is much smaller than T, and the frequency corresponding to ΔT is about several hundred MHz. Figure 3a In the figure, V represents the amplitude of the voltage. The amplitude V of the triangular wave signal can be adjusted and set to a fixed value. The amplitude V is smaller than the power supply voltage swing and larger than the maximum ripple on the power supply. The triangular wave signal can be coupled to the power supply terminal 110 in the form of noise. The number of triangles (that is, the number of cycles) included in each wave signal is not limited.

[0060] For example, the data processing device may be a PC (Personal Computer), or may be other devices with data processing capabilities, and the specific device type is not limited.

[0061] The two probes of the oscilloscope 400 collect wave signals at the power supply end 100 and the load end 200 respectively. It can be understood that the power supply circuit will produce impedance to the wave signal, so there is a difference between the wave signals collected by the two probes of the oscilloscope 400. For example, referring to Figure 3b As shown, it is assumed that the dotted triangle wave signal represents the first wave signal collected by the first probe 410 at the power supply end 110, the amplitude of the first wave signal is V, and the period is t 2 -t 0 , the falling edge duration is t 2 -t 1 The solid triangle wave signal represents the second wave signal collected by the second probe 420 at the load end 120. The amplitude of the second wave signal is V' and the period is t 2 '-t 0 ', the falling edge duration is t 2 '-t 1 Due to the attenuation of impedance, the rising and falling edges of the second wave signal are slower than those of the first wave signal. By analyzing the difference between the wave signals collected by the two probes, the spectrum characteristics of the power supply circuit can be determined.

[0062] In the embodiment of the present invention, the signal generator 200 is coupled with the power supply terminal 110 multiple times to generate a wave signal, that is, within a time period, the data processing device 300 controls the signal generator 200 to generate AC waves of different waveforms multiple times in succession, and each AC wave is coupled with the DC wave generated by the power supply terminal 110 to form a wave signal with a different waveform. A point value is calculated for each wave signal that occurs, so that the multiple point values ​​corresponding to the wave signals that occur multiple times can form a curve that characterizes the spectrum characteristics of the power supply circuit 100. As described above, each wave signal that occurs has an edge, and the edge frequency of each wave signal that occurs is different. If the edge is a falling edge, the duration of the falling edge in each wave signal that occurs is different; or, if the edge is a rising edge, the duration of the rising edge in each wave signal that occurs is different.

[0063] The data processing device 300 can obtain the first wave signal collected by the first probe 410 and the second wave signal collected by the second probe 420 for each wave signal that occurs; determine the edge frequency of the first wave signal as the first frequency; determine the amplitude of the first wave signal as the first amplitude; determine the edge frequency of the second wave signal as the second frequency; determine the amplitude of the second wave signal as the second amplitude; calculate the frequency difference between the first frequency and the second frequency, and calculate the amplitude difference between the first amplitude and the second amplitude, respectively, as the frequency difference and amplitude difference corresponding to the wave signal that occurs this time; determine the frequency spectrum characteristics of the power supply circuit according to the frequency difference and amplitude difference corresponding to the wave signal that occurs each time.

[0064] For example, still refer to Figure 3b As shown, the falling edge frequency of the first wave signal collected by the first probe 410 is f=1 / (t 2 -t 1 ), the amplitude is recorded as V, and the falling edge frequency of the second wave signal collected by the second probe 420 is recorded as f'=1 / (t 2 '-t 1 '), the amplitude is recorded as V', then Δf=f-f', ΔV=V-V' are calculated, Δf can represent the response frequency of the loop impedance, and the frequency spectrum characteristics of the power supply loop 100 are determined according to the changing relationship between Δf and ΔV. Alternatively, Δf=f'-f, ΔV=V'-V can also be calculated, and the frequency spectrum characteristics of the power supply loop 100 can be determined according to the changing relationship between Δf and ΔV.

[0065] As mentioned above, the power supply loop will produce impedance to the wave signal, which will cause attenuation. Figure 4 As shown, Δf can represent the frequency attenuated by the impedance of the power supply loop, and ΔV can represent the degree of attenuation.

[0066] Since PCB traces produce different impedances for wave signals of different frequencies, the attenuation degree of wave signals of different frequencies after passing through the PCB traces is different, so the distortion of the wave signals collected at the load end 120 is different. Taking the triangular wave signal as an example, the shorter the falling edge time of the triangular wave signal, the more obvious its high-frequency harmonics, and the more serious the distortion of the wave signal collected at the load end 120, which is manifested as: the amplitude becomes smaller and the falling edge becomes slower. Therefore, the frequency and attenuation degree attenuated by the PCB loop impedance can be determined based on Δf and ΔV.

[0067] In one embodiment, the data processing device 300 can determine the points corresponding to each wave signal that occurs in a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the horizontal coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the vertical coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; by fitting the determined points, a curve representing the frequency spectrum characteristics of the power supply circuit is generated.

[0068] refer to Figure 5 As shown in the figure, a coordinate system with f as the horizontal axis and V as the vertical axis can be established. Continuing with the above example, the horizontal coordinate of the point corresponding to each wave signal can be Δf, and the vertical coordinate can be ΔV. The interpolation method can be used to fit Figure 5 The curve shown in the figure can represent the influence of the power supply circuit on the power supply within the preset frequency range. It can be understood that the impedance of the power supply circuit is positively correlated with the voltage, so Figure 5 The curve shown in the figure can represent the impedance of the power supply circuit (with Figure 5 V in positive correlation) and frequency ( Figure 5 The changing relationship between f) in the figure can be used to determine the impedance change of the power supply circuit under signals of different frequencies.

[0069] Alternatively, in other implementations, a coordinate system may be established with frequency as the ordinate and amplitude as the abscissa, and the specific form of the coordinate system is not limited. The method of fitting to generate the curve is also not limited. In addition to the interpolation algorithm, other fitting methods may be used, such as first segmented fitting and then overall fitting, etc.

[0070] Still refer to Figure 3a For example, the period of the triangle wave signal is t 2 -t 0 =T, the waveform frequency is about tens of megahertz, and the falling edge duration of the triangle wave signal is t 2 -t 1 =ΔT, which can be controlled by the data processing device 300. ΔT is much smaller than T, and the frequency corresponding to ΔT is about several hundred MHz. 2 -t 1 =t 1 -t 0When , the Fourier expansion of the triangle wave signal is:

[0071]

[0072] Among them, ω represents the fundamental frequency angular velocity, f represents the frequency, and t represents the time. From the above formula, it can be seen that the frequency components of the triangular wave signal are very rich, and even if the fundamental frequency is low, high-frequency components will be generated.

[0073] If you adjust t 1 The position of the triangle wave signal shortens the falling edge time, the high-frequency component in the Fourier expansion will increase, and the coefficient of the high-frequency component will also become larger, that is, the amplitude of the high-frequency harmonic can reach a testable level, which is equivalent to a high-frequency wave signal.

[0074] It can be seen that in this solution, the signal generator is coupled to the power supply end to generate a wave signal with an edge (rising edge or falling edge), and the wave signal includes a high-frequency component, which is equivalent to a high-frequency wave signal. Therefore, there is no need for the power supply end to directly generate a high-frequency signal, which reduces the hardware performance requirements and thus reduces the equipment cost.

[0075] A system for applying the spectrum characteristics of a power supply circuit provided by the embodiment shown in the present invention comprises: a power supply circuit, a signal generator, a data processing device and an oscilloscope; the data processing device controls the signal generator to couple with the power supply end of the power supply circuit for multiple times to generate a wave signal, the two probes of the oscilloscope are configured to respectively collect the wave signals at the power supply end and the load end of the power supply circuit, and transmit the collected wave signals to the data processing device, and the data processing device determines the spectrum characteristics of the power supply circuit according to the wave signals collected by the two probes; on the one hand, the wave signal generated by the signal generator coupling with the power supply end includes a high-frequency component, that is, there is no need for the power supply end to directly generate a high-frequency signal, and the hardware performance requirements of the equipment are relatively low, and an ordinary oscilloscope and an ordinary signal generator can meet the requirements, without the need for expensive equipment investment; on the other hand, a new impedance characterization method is adopted, and simple mathematical calculations are used, which is easy to understand and convenient for industry promotion and training; on the other hand, the process is simple and efficient, the signal generator is coupled with the power supply end for multiple times to generate a wave signal, and then the spectrum characteristics of the power supply circuit can be obtained by simple mathematical calculations.

[0076] Corresponding to the above-mentioned system embodiment, the embodiment of the present invention further provides a method for determining the spectrum characteristics of a power supply circuit. The various steps in the following method embodiment can be executed in a logical order, and the step numbers or the order in which the steps are introduced do not limit the execution order of the steps.

[0077] refer to Figure 6 As shown, the scheme may include the following steps:

[0078] S601: A wave signal is generated by coupling the signal generator with the power supply end of the power supply circuit for multiple times. Each wave signal generated has an edge, and the edge frequency of each wave signal generated is different.

[0079] In one embodiment, the wave signal is a triangular wave signal; the edge is a falling edge, and the duration of the falling edge in each wave signal is different; or, the edge is a rising edge, and the duration of the rising edge in each wave signal is different. Alternatively, in other embodiments, the wave signal may also be a square wave signal, or other wave signals with edges.

[0080] S602: For each wave signal that occurs, the wave signal that occurs is collected at the power supply end and the load end of the power supply circuit, respectively, to obtain the amplitude and edge frequency of the wave signal that occurs at the power supply end, and the amplitude and edge frequency of the wave signal that occurs at the load end.

[0081] S603: Determine the frequency spectrum characteristics of the power supply circuit according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency at the load end.

[0082] In one implementation, S602 may include: for each occurrence of a wave signal, collecting the wave signal at the power supply end and the load end respectively, to obtain a first wave signal collected at the power supply end and a second wave signal collected at the load end; determining an edge frequency of the first wave signal as a first frequency; determining an amplitude of the first wave signal as a first amplitude; determining an edge frequency of the second wave signal as a second frequency; determining an amplitude of the second wave signal as a second amplitude;

[0083] The method further includes: calculating a frequency difference between the first frequency and the second frequency, and calculating an amplitude difference between the first amplitude and the second amplitude, as the frequency difference and amplitude difference corresponding to the wave signal generated this time, respectively;

[0084] In this implementation, S603 may include: determining the frequency spectrum characteristics of the power supply circuit according to the frequency difference and amplitude difference corresponding to the wave signal generated each time.

[0085] For example, in a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the points corresponding to each wave signal that occurs can be determined respectively, the horizontal coordinate of the point being the frequency difference corresponding to the wave signal that occurs this time, and the vertical coordinate of the point being the amplitude difference corresponding to the wave signal that occurs this time; by fitting the determined points, a curve characterizing the frequency spectrum characteristics of the power supply circuit is generated.

[0086] By applying the embodiment shown in the present invention, a wave signal is generated by coupling a signal generator with the power supply end of the power supply circuit for multiple times. Each wave signal generated has an edge, and the edge frequency of the wave signal generated each time is different. It can be seen from the Fourier expansion that the wave signal with an edge includes a high-frequency component, which is equivalent to a high-frequency wave signal. Then, the frequency spectrum characteristics of the power supply circuit are determined according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, as well as the amplitude and edge frequency at the load end. It can be seen that in this solution, the wave signal generated by the coupling of the signal generator with the power supply end includes a high-frequency component, so there is no need for the power supply end to directly generate a high-frequency signal, which reduces the hardware performance requirements and also reduces the equipment cost.

[0087] Corresponding to the above system embodiment, the embodiment of the present invention further provides a device for determining the spectrum characteristics of a power supply circuit, referring to Figure 7 As shown, including:

[0088] The wave signal generating module 701 is used to generate a wave signal by coupling with the power supply end of the power supply circuit through a signal generator for multiple times, and each wave signal generated has an edge, and the edge frequency of the wave signal generated each time is different;

[0089] The acquisition module 702 is used to acquire the wave signal generated each time at the power supply end and the load end, respectively, to obtain the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency of the wave signal generated each time at the load end;

[0090] The determination module 703 is used to determine the frequency spectrum characteristics of the power supply circuit according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, and the amplitude and edge frequency at the load end.

[0091] By applying the embodiment shown in the present invention, a wave signal is generated by coupling a signal generator with the power supply end of the power supply circuit for multiple times. Each wave signal generated has an edge, and the edge frequency of the wave signal generated each time is different. It can be seen from the Fourier expansion that the wave signal with an edge includes a high-frequency component, which is equivalent to a high-frequency wave signal. Then, the frequency spectrum characteristics of the power supply circuit are determined according to the amplitude and edge frequency of the wave signal generated each time at the power supply end, as well as the amplitude and edge frequency at the load end. It can be seen that in this solution, the wave signal generated by the coupling of the signal generator with the power supply end includes a high-frequency component, so there is no need for the power supply end to directly generate a high-frequency signal, which reduces the hardware performance requirements and also reduces the equipment cost.

[0092] In another embodiment of the present invention, a computer-readable storage medium is provided, in which a computer program is stored. When the computer program is executed by a processor, any one of the above methods for determining the spectrum characteristics of a power supply circuit is implemented.

[0093] In another embodiment of the present invention, a computer program product including instructions is provided. When the computer program product is run on a computer, the computer is enabled to execute any one of the above methods for determining the spectrum characteristics of a power supply circuit.

[0094] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present invention is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center to another website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium can be a magnetic medium (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state hard disk Solid State Disk (SSD)), etc.

[0095] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0096] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for method embodiments, device embodiments, computer-readable storage medium embodiments, and computer program product embodiments, since they are basically similar to system embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A system for determining a frequency spectrum characteristic of a power supply circuit, characterized in that: include: Power supply circuit, signal generator, data processing equipment and oscilloscope; among them, The power supply circuit includes a power supply end and a load end; The signal generator is connected to the power supply end of the power supply circuit and the data processing device respectively; the signal generator is configured to couple with the power supply end to generate wave signals for multiple times under the control of the data processing device, each wave signal has an edge, and the edge frequency of each wave signal is different; The first probe of the oscilloscope is connected to the power supply end, the second probe of the oscilloscope is connected to the load end, the oscilloscope is also connected to the data processing device, the first probe is configured to collect the wave signal of the power supply end and transmit it to the data processing device, and the second probe is configured to collect the wave signal of the load end and transmit it to the data processing device; The data processing device is configured to obtain the amplitude and edge frequency of the wave signal occurring each time at the power supply end according to the wave signal at the power supply end collected by the first probe, and obtain the amplitude and edge frequency of the wave signal occurring each time at the load end according to the wave signal at the load end collected by the second probe; obtain the frequency difference and amplitude difference of the wave signal occurring each time at the power supply end and the load end according to the amplitude and edge frequency of the wave signal occurring each time at the power supply end and the amplitude and edge frequency at the load end; The data processing device is also configured to determine the points corresponding to each wave signal that occurs in a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the horizontal coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the vertical coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; or, in a coordinate system with frequency as the vertical coordinate and amplitude as the horizontal coordinate, determine the points corresponding to each wave signal that occurs each time, the vertical coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the horizontal coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; by fitting the determined points, a curve characterizing the frequency spectrum characteristics of the power supply circuit is generated.

2. The system according to claim 1, characterized in that The signal generator is connected to the power supply end of the power supply circuit through a transmission line, the signal generator is connected to the data processing device through a data line, and the data processing device is connected to the oscilloscope through a data line.

3. The system according to claim 1, characterized in that The wave signal is a triangular wave signal; The edge is a falling edge, and the duration of the falling edge in the wave signals occurring each time is different; or, the edge is a rising edge, and the duration of the rising edge in the wave signals occurring each time is different.

4. The system according to claim 1, characterized in that The data processing device is configured to: For each wave signal that occurs, obtain the first wave signal collected by the first probe and the second wave signal collected by the second probe; determine the edge frequency of the first wave signal as the first frequency; determine the amplitude of the first wave signal as the first amplitude; determine the edge frequency of the second wave signal as the second frequency; determine the amplitude of the second wave signal as the second amplitude; calculate the frequency difference between the first frequency and the second frequency, and calculate the amplitude difference between the first amplitude and the second amplitude, respectively as the frequency difference and amplitude difference corresponding to the wave signal that occurred this time.

5. A method for determining the spectrum characteristics of a power supply circuit, characterized in that: include: The signal generator is coupled with the power supply end of the power supply circuit for multiple times to generate a wave signal. Each wave signal generated has an edge, and the edge frequency of each wave signal generated is different. For each wave signal that occurs, the wave signal that occurs this time is collected at the power supply end and the load end respectively, and the amplitude and edge frequency of the wave signal that occurs this time at the power supply end, as well as the amplitude and edge frequency of the wave signal that occurs this time at the load end are obtained; according to the amplitude and edge frequency of the wave signal that occurs this time at the power supply end, as well as the amplitude and edge frequency of the wave signal that occurs this time at the load end, the frequency difference and amplitude difference of the wave signal that occurs this time at the power supply end and the load end are obtained; In a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the points corresponding to the wave signal that occurs each time are determined respectively, the horizontal coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the vertical coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; or, in a coordinate system with frequency as the vertical coordinate and amplitude as the horizontal coordinate, the points corresponding to the wave signal that occurs each time are determined respectively, the vertical coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the horizontal coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; by fitting the determined points, a curve representing the frequency spectrum characteristics of the power supply circuit is generated.

6. The method according to claim 5, characterized in that The wave signal is a triangular wave signal; The edge is a falling edge, and the duration of the falling edge in the wave signals occurring each time is different; or, the edge is a rising edge, and the duration of the rising edge in the wave signals occurring each time is different.

7. The method according to claim 5, characterized in that For each wave signal that occurs, the wave signal that occurs is collected at the power supply end and the load end respectively, and the amplitude and edge frequency of the wave signal that occurs at the power supply end, as well as the amplitude and edge frequency of the wave signal that occurs at the load end, and the frequency difference and amplitude difference of the wave signal that occurs at the power supply end and the load end are obtained according to the amplitude and edge frequency of the wave signal that occurs at the power supply end, as well as the amplitude and edge frequency of the wave signal that occurs at the load end, including: For each wave signal that occurs, the wave signal that occurs is collected at the power supply end and the load end respectively to obtain a first wave signal collected at the power supply end and a second wave signal collected at the load end; an edge frequency of the first wave signal is determined as a first frequency; an amplitude of the first wave signal is determined as a first amplitude; an edge frequency of the second wave signal is determined as a second frequency; and an amplitude of the second wave signal is determined as a second amplitude; The method further includes: calculating the frequency difference between the first frequency and the second frequency, and calculating the amplitude difference between the first amplitude and the second amplitude, as the frequency difference and amplitude difference corresponding to the wave signal generated this time, respectively.

8. A device for determining the spectrum characteristics of a power supply circuit, characterized in that: include: The wave signal generating module is used to generate the wave signal by coupling the signal generator with the power supply end of the power supply circuit for multiple times, and each wave signal generated has an edge, and the edge frequency of each wave signal generated is different; The acquisition module is used to acquire the wave signal occurring each time at the power supply end and the load end respectively, and obtain the amplitude and edge frequency of the wave signal occurring at the power supply end, and the amplitude and edge frequency of the wave signal occurring at the load end; and obtain the frequency difference and amplitude difference of the wave signal occurring at the power supply end and the load end according to the amplitude and edge frequency of the wave signal occurring at the power supply end, and the amplitude and edge frequency of the wave signal occurring at the load end; A determination module is used to determine the points corresponding to each wave signal that occurs in a coordinate system with frequency as the horizontal coordinate and amplitude as the vertical coordinate, the horizontal coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the vertical coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; or, in a coordinate system with frequency as the vertical coordinate and amplitude as the horizontal coordinate, determine the points corresponding to each wave signal that occurs each time, the vertical coordinate of the point is the frequency difference corresponding to the wave signal that occurs this time, and the horizontal coordinate of the point is the amplitude difference corresponding to the wave signal that occurs this time; by fitting the determined points, a curve representing the frequency spectrum characteristics of the power supply circuit is generated.

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