CN111900979A - Method and device for dynamically adjusting spread spectrum and electronic equipment - Google Patents
Method and device for dynamically adjusting spread spectrum and electronic equipment Download PDFInfo
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- H—ELECTRICITY
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- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
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- H03L7/197—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between numbers which are variable in time or the frequency divider dividing by a factor variable in time, e.g. for obtaining fractional frequency division
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- H—ELECTRICITY
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- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
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Abstract
The application provides a method, a device and electronic equipment for dynamically adjusting spread spectrum, wherein the method for dynamically adjusting spread spectrum comprises the steps of acquiring an original signal waveform generated by SSCG; acquiring a reference frequency in a first preset frequency range of an original signal waveform, wherein the first preset frequency range is a frequency range including the maximum frequency; adjusting the frequency in a predetermined step from the reference frequency to generate an adjustment waveform; and generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the method for dynamically adjusting the spread spectrum is effectively dispersed, the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal on EMI radiation noise is improved. And the reference frequency and the preset step size in the method can be adjusted, so that the modulation frequency of the SSCG can be adjusted in a dynamic and non-fixed frequency manner.
Description
Technical Field
The present application relates to the field of high-speed digital signal transmission, and in particular, to a method, an apparatus, a computer-readable storage medium, a processor, and an electronic device for dynamically adjusting spread spectrum.
Background
In the present high-speed data transmission system, a serial link structure has become the mainstream, and as the data rate of the interface is continuously increased, the internal clock frequency also reaches several ghz, which makes the electromagnetic interference (EMI) become serious. Many consumer electronics standards that strictly regulate the level of electromagnetic radiation now have a variety of techniques to reduce electromagnetic interference, several of which are common including shielding, pulse shaping, slew rate control and spread spectrum clock generators. Among them, Spread Spectrum Clock Generator (SSCG) is the best technology for high-speed systems with the best performance and the lowest cost.
However, the existing SSCG adopts a fixed frequency modulation (e.g. 24KHz or 20KHz) to solve the EMI, and a fixed modulation frequency is used to disperse the clock energy for EMI interference in a specific application. Since the frequency modulation of SSCG is performed continuously, it is easy to generate frequency spikes within the interval of the modulation period, thereby causing additional energy and interference.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
It is a primary object of the present application to provide a method, apparatus, computer-readable storage medium, processor and electronic device for dynamically adjusting spreading to alleviate the problem of EMI frequency spikes caused by SSCG modulation in the prior art.
According to an aspect of the embodiments of the present application, there is provided a method for dynamically adjusting spreading, including: acquiring an original signal waveform generated by SSCG; acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including the maximum frequency; adjusting the frequency in a preset step from the reference frequency to generate an adjusting waveform; and generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
Optionally, adjusting the frequency in predetermined steps starting from the reference frequency, generating an adjustment waveform, comprising a second predetermined frequency range of the process of determining the adjustment frequency; determining an adjustment duration of the process of adjusting the frequency; determining the predetermined step size; according to the second predetermined frequency range, the adjustment time length and the predetermined step size, starting from the reference frequency, increasing the frequency and/or decreasing the frequency by the predetermined step size until the adjustment time reaches the adjustment time length, and the increased frequency and/or the decreased frequency are/is within the second predetermined frequency range; an adjustment waveform is generated for each of the frequencies that includes an adjustment process.
Optionally, according to the second predetermined frequency range, the adjustment duration and the predetermined step size, starting from the reference frequency, increasing the frequency and/or decreasing the frequency by the predetermined step size until the adjustment time reaches the adjustment duration, and the increased frequency and/or the decreased frequency are within the second predetermined frequency range, including a first increasing step: sequentially increasing one preset step length from the reference frequency to obtain an adjusted frequency; and (3) reducing: starting to sequentially reduce the adjusted frequency by one predetermined step length until the adjusted frequency coincides with the maximum value of the second predetermined frequency range; a second adding step: starting to sequentially increase the adjusted frequency by one predetermined step length until the adjusted frequency coincides with the minimum value of the second predetermined frequency range; and repeating the decreasing step and the second increasing step at least once in sequence until the adjusting time reaches the adjusting duration.
Optionally, determining a second predetermined frequency range of the process of adjusting the frequency includes determining a predetermined threshold corresponding to the reference frequency; and determining the second preset frequency range according to the reference frequency and the preset threshold value.
Optionally, the reference frequency is not a maximum value within the first predetermined frequency range.
Optionally, the signal waveform is a clock signal waveform.
According to another aspect of the embodiments of the present application, there is provided an apparatus for dynamically adjusting spread spectrum, including a first acquiring unit, a second acquiring unit, a first generating unit, and a second generating unit, wherein the first acquiring unit is configured to acquire an original signal waveform generated by SSCG; the second acquiring unit is used for acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including the maximum frequency; the first generating unit is used for adjusting the frequency by preset steps from the reference frequency and generating an adjusting waveform; the second generating unit is used for generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
According to still another aspect of embodiments of the present application, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the above methods for dynamically adjusting spread spectrum.
According to still another aspect of the embodiments of the present invention, there is further provided a processor, configured to run a program, where the program is executed to perform any one of the above methods for dynamically adjusting spreading.
According to another aspect of embodiments of the present application, there is also provided an electronic device comprising one or more processors, memory, a display apparatus, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including instructions for performing the method of dynamically adjusting spread spectrum of any of the above.
In an embodiment of the present application, a method for dynamically adjusting spread spectrum is provided, in which the reference frequency in the first predetermined frequency range of the original signal waveform is obtained, the frequency is increased and/or decreased by a predetermined step from the reference frequency to generate the adjustment waveform in the first predetermined frequency range, and then the adjustment signal waveform is generated according to the original signal waveform and the adjustment waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the method for dynamically adjusting the spread spectrum is effectively dispersed, so that the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal on EMI radiation noise is improved. In addition, in the method, the reference frequency and the preset step size can be adjusted, so that the modulation frequency of the SSCG can be adjusted in a dynamic and non-fixed frequency mode.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a flow diagram of a method of dynamically adjusting spreading according to an exemplary embodiment of the present application;
FIG. 2 is a diagram illustrating an adjustment waveform generated by the method for dynamically adjusting spread spectrum according to the present application when the adjustment duration is 10 μ s;
fig. 3 shows a schematic diagram of an adjustment waveform generated by the method for dynamically adjusting spread spectrum according to the present application when the adjustment duration is 100 μ s.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background, in order to solve the above problem of EMI frequency spikes caused by SSCG modulation in the prior art, in an exemplary embodiment of the present application, a method, an apparatus, a computer-readable storage medium, a processor, and an electronic device for dynamically adjusting spread spectrum are provided.
According to an exemplary embodiment of the present application, a method of dynamically adjusting spreading is provided. Fig. 1 is a flowchart of a method for dynamically adjusting spreading according to an embodiment of the present application, and as shown in fig. 1, the method for dynamically adjusting spreading includes the following steps:
step S101, acquiring an original signal waveform generated by SSCG;
step S102, acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including a maximum frequency;
step S103, adjusting the frequency by a preset step length from the reference frequency to generate an adjusting waveform, wherein the abscissa of the adjusting waveform is time, and the ordinate is each frequency obtained by adjustment;
and step S104, generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
The dynamic adjustment spread spectrum method generates the adjustment waveform in the first predetermined frequency range by acquiring the reference frequency in the first predetermined frequency range of the original signal waveform, increasing the frequency and/or decreasing the frequency in predetermined steps from the reference frequency, and then generates the adjustment signal waveform according to the original signal waveform and the adjustment waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the method for dynamically adjusting the spread spectrum is effectively dispersed, the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal on EMI radiation noise is improved. In the above method, the reference frequency and the predetermined step size may be adjusted, so that the modulation frequency of the SSCG may be adjusted dynamically and in a non-fixed frequency manner.
According to a specific embodiment of the present application, the frequency is adjusted in predetermined steps from the reference frequency, and an adjustment waveform is generated, including a second predetermined frequency range for determining the process of adjusting the frequency, where the second predetermined frequency range is a frequency variation range corresponding to the process of adjusting the frequency; determining the adjustment duration of the process of adjusting the frequency; determining said predetermined step size of said reference frequency; increasing the frequency and/or decreasing the frequency in the predetermined step from the reference frequency until the adjustment time reaches the adjustment time period according to the second predetermined frequency range, the adjustment time period and the predetermined step, wherein the increased frequency and/or the decreased frequency are within the second predetermined frequency range; an adjustment waveform is generated for each of the above frequencies that includes the adjustment process. The first predetermined frequency range and the second predetermined frequency range may be the same or different. The method for dynamically adjusting spread spectrum starts from the reference frequency, increases the frequency and/or decreases the frequency in the predetermined step length within the second predetermined frequency range within the adjustment time length to generate the adjustment waveform, further disperses the frequency of the original signal waveform, reduces the peak value of the original signal waveform, and improves the anti-interference capability. And the reference frequency, the second predetermined frequency range, the predetermined step size and the adjustment duration are all adjustable, so that the modulation frequency of the SSCG can be adjusted in a dynamic, non-fixed frequency manner.
In another specific embodiment of the present application, increasing and/or decreasing the frequency in the predetermined step from the reference frequency until the adjustment time reaches the adjustment time period, and the increased frequency and/or the decreased frequency are within the second predetermined frequency range according to the second predetermined frequency range, the adjustment time period, and the predetermined step, includes: a first adding step: sequentially increasing one preset step length from the reference frequency to obtain an adjusted frequency; and (3) reducing: starting to decrease the adjusted frequency by one of the predetermined steps in sequence until the adjusted frequency coincides with the maximum value of the second predetermined frequency range; a second adding step: starting to increase the adjusted frequency by one of the predetermined steps in sequence until the adjusted frequency coincides with the minimum value of the second predetermined frequency range; and repeating the decreasing step and the second increasing step at least once until the adjusting time reaches the adjusting time length. By repeating the reducing step and the second increasing step at least once, the concentrated energy in the first predetermined frequency range of the original signal waveform is effectively dispersed, and the peak phenomenon in the first predetermined frequency range of the original signal waveform is relieved.
Specifically, in order to further alleviate the spike phenomenon and obtain the above adjusting signal waveform with better effect, the above decreasing step and the above second increasing step may be repeated for a plurality of times until the above adjusting signal waveform is generated to achieve the ideal effect.
According to another specific embodiment of the present application, determining the second predetermined frequency range of the process of adjusting the frequency includes determining a predetermined threshold corresponding to the reference frequency; and determining the second predetermined frequency range according to the reference frequency and the predetermined threshold. The second predetermined frequency range is determined by determining the predetermined threshold, so that the frequencies are ensured to be within the second predetermined frequency range in the adjusting process, frequency peaks are effectively relieved, electromagnetic interference is inhibited, and the frequencies are prevented from being excessively dispersed in the adjusting process.
In order to further ensure that the deviation between the generated adjustment signal waveform and the original signal waveform is small and to avoid distortion of the adjustment signal waveform, according to an embodiment of the present application, the reference frequency is not a maximum value within the first predetermined frequency range.
According to another embodiment of the present application, the signal waveform is a clock signal waveform. By the method for dynamically adjusting the spread spectrum, the frequency spike phenomenon of the clock signal waveform can be effectively relieved, and the influence of electromagnetic interference on the clock signal waveform is well inhibited. Of course, the signal waveform may be other digital signal waveforms, and the frequency spike phenomenon of the digital signal waveform is alleviated by the method for dynamically adjusting the spread spectrum.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
According to another exemplary embodiment of the present application, there is provided an apparatus for dynamically adjusting spread spectrum, including a first acquiring unit, a second acquiring unit, a first generating unit, and a second generating unit, the first acquiring unit being configured to acquire an original signal waveform generated by SSCG; the second acquiring unit is used for acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including the maximum frequency; a first generating unit for adjusting the frequency in a predetermined step from the reference frequency to generate an adjustment waveform; the second generating unit is used for generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
The dynamic spectrum spread adjusting apparatus first acquires the reference frequency of the original signal waveform in the first predetermined frequency range by the first acquiring unit and the second acquiring unit, then the first generating unit increases the frequency and/or decreases the frequency by a predetermined step from the reference frequency to generate the adjusted waveform in the first predetermined frequency range, and finally the second generating unit generates the adjusted signal waveform based on the original signal waveform and the adjusted waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the device for dynamically adjusting the spread spectrum is effectively dispersed, the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal to EMI radiation noise is improved.
According to a specific embodiment of the present application, the first generating unit includes a first determining module, a second determining module, a third determining module, an adjusting module and a generating module, wherein the first determining module is configured to determine a second predetermined frequency range of the process of adjusting the frequency; the second determining module is used for determining the adjusting time length of the process of adjusting the frequency; the third determining module is used for determining the preset step length of the reference frequency; the adjusting module is used for increasing the frequency and/or decreasing the frequency by the preset step length from the reference frequency until the adjusting time reaches the adjusting time length according to the second preset frequency range, the adjusting time length and the preset step length, and the increased frequency and/or the decreased frequency are/is in the second preset frequency range; the generation module is used for generating an adjusting waveform of each frequency including the adjusting process. The first predetermined frequency range and the second predetermined frequency range may be the same or different. The device for dynamically adjusting spread spectrum increases the frequency and/or decreases the frequency in the second predetermined frequency range within the predetermined step length from the reference frequency to generate the adjustment waveform, further disperses the frequency of the original signal waveform, reduces the peak value of the original signal waveform, and improves the anti-interference capability.
According to an embodiment of the present application, the adjusting module includes a first increasing sub-module, a decreasing sub-module, a second increasing sub-module, and a repeating sub-module, where the first increasing sub-module is configured to increase one predetermined step length in sequence from the reference frequency to obtain an adjusted frequency; the decreasing submodule is used for sequentially decreasing the adjusted frequency by one preset step length until the adjusted frequency is coincident with the maximum value of the second preset frequency range; a second increasing submodule, configured to start to sequentially increase the adjusted frequency by one predetermined step length until the adjusted frequency coincides with a minimum value of the second predetermined frequency range; the repeating submodule is used for repeating the step of the decreasing module and the step of the second increasing module at least once in sequence until the adjusting time reaches the adjusting duration. By repeating the reducing submodule and the second increasing submodule at least once, the concentrated energy in the first predetermined frequency range of the original signal waveform is effectively dispersed, and the peak phenomenon in the first predetermined frequency range of the original signal waveform is relieved.
Specifically, in order to further alleviate the spike phenomenon and obtain the adjustment signal waveform with better effect, the reducing sub-module and the second increasing sub-module may be further repeatedly executed for a plurality of times until the generated adjustment signal waveform achieves the ideal effect.
According to another embodiment of the present application, the first determining module includes a first determining submodule and a second determining submodule, and the first determining submodule is configured to determine a predetermined threshold corresponding to the reference frequency; the second determining submodule is used for determining the second predetermined frequency range by determining the predetermined threshold according to the reference frequency and the predetermined threshold, ensuring that each frequency is within the second predetermined frequency range in the adjusting process, avoiding the frequency from being too dispersed in the adjusting process while ensuring that frequency peaks are effectively relieved and electromagnetic interference is inhibited, and determining the second predetermined frequency range.
In order to further ensure that the deviation between the generated adjustment signal waveform and the original signal waveform is small and to avoid distortion of the adjustment signal waveform, according to a further embodiment of the present application, the reference frequency in the second acquisition unit is not a maximum value within the first predetermined frequency range.
According to another specific embodiment of the present application, the signal waveform in the device for dynamically adjusting spread spectrum is a clock signal waveform. The device for dynamically adjusting the spread spectrum can effectively relieve the frequency spike phenomenon of the clock signal waveform and well inhibit the influence of electromagnetic interference on the clock signal waveform. Of course, the signal waveform may be other digital signal waveforms, and the frequency spike phenomenon of the digital signal waveform is alleviated by the dynamic spectrum spreading adjustment device.
Specifically, the device for dynamically adjusting spread spectrum is an MCU (Micro Control Unit), and of course, the device for dynamically adjusting spread spectrum may also be other devices for dynamically adjusting spread spectrum, such as a register or a chip.
An embodiment of the present invention provides a computer-readable storage medium, where the storage medium includes a program stored therein, and the program executes the method for dynamically adjusting spread spectrum.
By executing the method for dynamically adjusting spread spectrum through the computer readable storage medium, the peak frequency phenomenon of the original signal waveform is effectively relieved, and the suppression effect on EMI radiation noise is further realized.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method for dynamically adjusting spread spectrum is executed when the program runs.
The processor executes the method for dynamically adjusting the spread spectrum by running the program, so that the frequency spike phenomenon of a signal waveform is relieved, and the anti-interference capability to EMI is effectively improved.
An embodiment of the present invention provides an electronic device, including one or more processors, a display device, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for executing the method for dynamically adjusting spread spectrum.
By operating the method for dynamically adjusting the spread spectrum, the electronic equipment can dynamically adjust the SSCG modulation frequency in a non-fixed frequency mode, so that frequency peaks are further suppressed, a good signal waveform effect obtained through the electronic equipment is ensured, and the anti-interference capability of the electronic equipment on EMI is ensured.
The device for dynamically adjusting spread spectrum comprises a processor and a memory, wherein the first acquiring unit, the second acquiring unit, the first generating unit, the second generating unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and the EMI frequency spike problem caused by SSCG modulation in the prior art is relieved by adjusting kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a storage medium, on which a program is stored, which when executed by a processor implements the above-mentioned method for dynamically adjusting spread spectrum.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method for dynamically adjusting spread spectrum is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
step S101, acquiring an original signal waveform generated by SSCG;
step S102, acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including a maximum frequency;
step S103, starting from the reference frequency, adjusting the frequency by a preset step length to generate an adjusting waveform;
and step S104, generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
step S101, acquiring an original signal waveform generated by SSCG;
step S102, acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including a maximum frequency;
step S103, starting from the reference frequency, adjusting the frequency by a preset step length to generate an adjusting waveform;
and step S104, generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
In order to make the technical solutions of the present application more clearly understood by those skilled in the art, the following description will be given with reference to specific embodiments.
Example 1
By the method for dynamically adjusting spread spectrum, the exemplary graph of the adjustment waveform of the first predetermined frequency range shown in fig. 2 and fig. 3 is formed, and the specific implementation steps are as follows:
acquiring an original signal waveform generated by SSCG;
acquiring a reference frequency within a first preset frequency range of the original signal waveform, wherein the reference frequency is 20 KHz;
determining a predetermined threshold corresponding to the reference frequency, and determining the second predetermined frequency range according to the reference frequency and the predetermined threshold, wherein the predetermined threshold is 10KHz, and thus the second predetermined frequency range is determined to be 10KHz to 30 KHz;
adjusting the frequency in a predetermined step from the reference frequency to generate an adjustment waveform; specifically, the predetermined step is 2KHz, and the adjustment process includes:
a first increasing step, starting from the reference frequency of 20KHz, sequentially increasing the reference frequency of 20KHz by the preset step length of 2KHz, increasing for the first time to obtain an adjusted frequency of 22KHz, increasing for the second time to obtain an adjusted frequency of 24KHz, and increasing for the third time to obtain an adjusted frequency of 26 KHz;
a reduction step, when the adjusted frequency is coincident with the maximum value of 30KHz in the second preset frequency range, starting to reduce the adjusted frequency of 30KHz by one preset step length of 2KHz, obtaining an adjusted frequency of 28KHz by first reduction, obtaining an adjusted frequency of 26KHz by second reduction, and obtaining an adjusted frequency of 24KHz by third reduction;
a second increasing step of starting to sequentially increase the adjusted frequency by one predetermined step size of 2KHz until the adjusted frequency coincides with a minimum value of 10KHz of the second predetermined frequency range.
And repeating the decreasing step and the second increasing step in sequence until the adjusting time reaches the adjusting time length. When the above-described adjustment time periods are 10 μ s and 100 μ s, respectively, the adjustment waveforms generated including the respective above-described frequencies in the adjustment process are as shown in fig. 2 and 3.
Of course, the reference frequency, the second predetermined frequency range, the adjustment time length, and the predetermined step size may be other values.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the method for dynamically adjusting spread spectrum according to the present application generates the adjusted waveform in the first predetermined frequency range by acquiring the reference frequency in the first predetermined frequency range of the original signal waveform, increasing the frequency and/or decreasing the frequency in predetermined steps from the reference frequency, and then generates the adjusted signal waveform according to the original signal waveform and the adjusted waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the method for dynamically adjusting the spread spectrum is effectively dispersed, the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal on EMI radiation noise is improved. In the above method, the reference frequency and the predetermined step size may be adjusted, so that the modulation frequency of the SSCG may be adjusted dynamically and in a non-fixed frequency manner.
2) In the apparatus for dynamically adjusting spread spectrum according to the present invention, the first acquiring means and the second acquiring means acquire the reference frequency of the original signal waveform within the first predetermined frequency range, the first generating means increases the frequency and/or decreases the frequency from the reference frequency by a predetermined step to generate the adjustment waveform within the first predetermined frequency range, and the second generating means generates the adjustment signal waveform from the original signal waveform and the adjustment waveform. The single and concentrated energy of the waveform of the adjusting signal generated by the device for dynamically adjusting the spread spectrum is effectively dispersed, the frequency peak value of the signal can be effectively reduced, the frequency peak is inhibited, and the anti-interference capability of the signal to EMI radiation noise is improved.
3) The computer readable storage medium of the present application executes the above method for dynamically adjusting spread spectrum, which realizes effective mitigation of the peak frequency phenomenon of the original signal waveform, and further realizes the suppression of EMI radiation noise.
4) The processor of the application, by running the program, the program executes the method for dynamically adjusting the spread spectrum, so that the frequency spike phenomenon of the signal waveform is relieved, and the anti-interference capability to EMI is effectively improved.
5) By operating the method for dynamically adjusting the spread spectrum, the electronic equipment can dynamically adjust the SSCG modulation frequency in a non-fixed frequency mode, so that frequency peaks are further suppressed, a good signal waveform effect obtained through the electronic equipment is ensured, and the anti-interference capability of the electronic equipment on EMI is ensured.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for dynamically adjusting spreading, comprising:
acquiring an original signal waveform generated by SSCG;
acquiring a reference frequency in a first preset frequency range of the original signal waveform, wherein the first preset frequency range is a frequency range including the maximum frequency;
adjusting the frequency in a preset step from the reference frequency to generate an adjusting waveform;
and generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
2. The method of dynamically adjusting spreading according to claim 1, wherein adjusting the frequency in predetermined steps starting from the reference frequency, generating an adjustment waveform, comprises:
determining a second predetermined frequency range of the process of adjusting the frequency;
determining an adjustment duration of the process of adjusting the frequency;
determining the predetermined step size;
according to the second predetermined frequency range, the adjustment time length and the predetermined step size, starting from the reference frequency, increasing the frequency and/or decreasing the frequency by the predetermined step size until the adjustment time reaches the adjustment time length, and the increased frequency and/or the decreased frequency are/is within the second predetermined frequency range;
an adjustment waveform is generated for each of the frequencies that includes an adjustment process.
3. The method according to claim 2, wherein increasing the frequency and/or decreasing the frequency in the predetermined step from the reference frequency until the adjustment time reaches the adjustment duration and the increased frequency and/or the decreased frequency are within the second predetermined frequency range according to the second predetermined frequency range, the adjustment duration and the predetermined step, comprises:
a first adding step: sequentially increasing one preset step length from the reference frequency to obtain an adjusted frequency;
and (3) reducing: starting to sequentially reduce the adjusted frequency by one predetermined step length until the adjusted frequency coincides with the maximum value of the second predetermined frequency range;
a second adding step: starting to sequentially increase the adjusted frequency by one predetermined step length until the adjusted frequency coincides with the minimum value of the second predetermined frequency range;
and repeating the decreasing step and the second increasing step at least once in sequence until the adjusting time reaches the adjusting duration.
4. The method of dynamically adjusting spreading according to claim 2, wherein determining the second predetermined frequency range of the process of adjusting the frequency comprises:
determining a predetermined threshold corresponding to the reference frequency;
and determining the second preset frequency range according to the reference frequency and the preset threshold value.
5. The method of dynamically adjusting spreading according to claim 1, wherein the reference frequency is not a maximum value within the first predetermined frequency range.
6. The method of claim 1, wherein the signal waveform is a clock signal waveform.
7. An apparatus for dynamically adjusting spreading, comprising:
a first acquisition unit configured to acquire an original signal waveform generated by the SSCG;
a second acquisition unit configured to acquire a reference frequency within a first predetermined frequency range of the original signal waveform, the first predetermined frequency range being a frequency range including a maximum frequency;
a first generation unit configured to adjust a frequency in a predetermined step from the reference frequency, and generate an adjustment waveform;
and the second generating unit is used for generating an adjusting signal waveform according to the original signal waveform and the adjusting waveform.
8. A computer-readable storage medium, characterized in that the storage medium includes a stored program, wherein the program executes the method of dynamically adjusting spreading according to any one of claims 1 to 6.
9. A processor, characterized in that the processor is configured to run a program, wherein the program is configured to execute the method for dynamically adjusting spreading according to any one of claims 1 to 6 when running.
10. An electronic device, comprising: one or more processors, memory, a display device, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs comprising instructions for performing the method of dynamically adjusting spreading according to any of claims 1-6.
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