CN115441984B

CN115441984B - Device, method and electronic equipment for suppressing electromagnetic radiation in signal line

Info

Publication number: CN115441984B
Application number: CN202211373432.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Moore Threads Technology Co Ltd
Current assignee: Moore Threads Technology Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-03-03
Anticipated expiration: 2042-11-04
Also published as: CN115441984A

Abstract

The application relates to the technical field of electronic circuits, and provides a device and a method for suppressing electromagnetic radiation in a signal line and electronic equipment. The device is applied to the sending end chip, and the device includes: a dynamic scrambling control unit (11) that generates an Inversion Control Signal (ICS) from information on the change of the symbols of the signals on the plurality of signal lines; and a signal scrambling unit (12) that scrambles signals transmitted through the plurality of signal lines based on the inversion control signal, the scrambling being configured to scramble a periodicity of the signals transmitted through the plurality of signal lines. In the apparatus for suppressing electromagnetic radiation in the signal lines, the signals in the plurality of signal lines are scrambled according to the change information of the symbols of the signals in the plurality of signal lines, so that the periodicity of the signals in the signal lines is disturbed, and the electromagnetic radiation is reduced.

Description

Device, method and electronic equipment for suppressing electromagnetic radiation in signal line

Technical Field

The present application relates to the field of electronic circuit technology, and in particular, to an apparatus, a method, and an electronic device for suppressing electromagnetic radiation in a signal line.

Background

In the transmission of digital signals, the signals sometimes have a certain repetition (repetition) periodicity. According to the fourier transform principle, the stronger the periodicity of the signal in the time domain, the more discrete the signal in the frequency domain, i.e., the more concentrated the energy of the signal in the frequency domain on individual discrete frequency points. Also, the stronger the periodicity of the signal in the time domain, the greater the radiated power spectral density at discrete frequency points, and the more likely the generated electromagnetic interference (EMI) will exceed the limit requirements.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The prior art generally employs the following means to destroy the periodicity of the signal, thereby reducing the electromagnetic radiation generated by the signal, for example: a scrambler (scrambler) is arranged at a signal sending end to perform scrambling processing (scrambling) on a signal to be sent, and the signal is scrambled and then transmitted, so that the periodicity of the original signal is damaged; alternatively, the frequency of the periodic clock signal is dithered within a certain range, so that the periodicity of the signal generated based on the clock signal is destroyed.

The inventor of the present application finds that, in the prior art, the processing for destroying the periodicity of the signal is always performed within a period of time, and it cannot be flexibly determined whether to perform the processing for destroying the periodicity of the signal according to the actual condition of the digital signal, so the flexibility of the processing is poor, and the power consumption is large.

To solve at least the above technical problems or similar technical problems, embodiments of the present application provide an apparatus, a method, and an electronic device for suppressing electromagnetic radiation in a signal line. In the apparatus for suppressing electromagnetic radiation in the signal lines, the signals in the plurality of signal lines are subjected to scrambling processing based on the change information of the symbols of the signals in the plurality of signal lines, thereby disturbing the periodicity of the signals in the signal lines and reducing the electromagnetic radiation, and therefore, the processing for reducing the electromagnetic radiation can be performed in a flexible manner and the power consumption can be reduced.

The embodiment of the application provides a device for suppressing electromagnetic radiation in signal line, is applied to the sending end chip, the device includes:

a dynamic scrambling control unit (11) that generates an Inversion Control Signal (ICS) from information on the change of the symbols of the signals on the plurality of signal lines; and

and a signal scrambling unit (12) that performs scrambling processing for scrambling the periodicity of the signals transmitted through the plurality of signal lines, according to the inversion control signal.

The embodiment of the present application further provides a method for suppressing electromagnetic radiation in a signal line, which is applied to a transmitting-end chip, and the method includes:

generating an Inversion Control Signal (ICS) based on the variation information of the symbols of the signals in the plurality of signal lines; and

and according to the turnover control signal, carrying out scrambling processing on the signals transmitted in the plurality of signal lines, wherein the scrambling processing is used for scrambling the periodicity of the signals transmitted in the plurality of signal lines.

The beneficial effects of the embodiment of the application are that: the signals in the plurality of signal lines are scrambled according to the change information of the symbols of the signals in the plurality of signal lines, so that the periodicity of the signals in the signal lines is disturbed, and electromagnetic radiation is reduced.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the present application include many variations, modifications, and equivalents within the scope of the terms of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:

FIG. 1 is a schematic diagram of an apparatus for suppressing electromagnetic radiation in a signal line in accordance with an embodiment of a first aspect of the present application;

fig. 2 to 4 are schematic diagrams of an example of scrambling processing based on control of the dynamic scrambling control unit;

fig. 5 to 7 are schematic diagrams of another example of the scrambling processing based on the control of the dynamic scrambling control unit;

FIG. 8 is a schematic diagram of a method for suppressing electromagnetic radiation in a signal line in accordance with an embodiment of the second aspect of the present application;

fig. 9 is a schematic diagram of an electronic device.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the described embodiments, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims. Various embodiments of the present application will be described below with reference to the drawings. These embodiments are merely exemplary and are not intended to limit the present application.

In the embodiments of the present application, the terms "first", "second", "upper", "lower", and the like are used for distinguishing different elements from each other in terms of designation, but do not indicate a spatial arrangement or temporal order of the elements, and the elements should not be limited by these terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, or groups, but do not preclude the presence or addition of one or more other features, elements, components, or groups thereof.

In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "comprising" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Furthermore, the term "according to" should be understood as "according at least in part to \8230;" based on "should be understood as" based at least in part on \8230; "unless the context clearly indicates otherwise.

Embodiments of the first aspect

Embodiments of a first aspect of the present application provide an apparatus for suppressing electromagnetic radiation in a signal line.

Fig. 1 is a schematic diagram of an apparatus for suppressing electromagnetic radiation in a signal line according to the present application. As shown in fig. 1, an apparatus 100 for suppressing electromagnetic radiation in a signal line includes: a dynamic scrambling control unit 11 and a signal scrambling unit 12.

The dynamic scrambling control unit 11 can generate the flipping control signal ICS according to the change information of the symbols of the signals in the plurality of signal lines; the signal scrambling unit 12 performs scrambling processing on signals transmitted in the plurality of signal lines according to the inversion control signal ICS. Wherein the scrambling process is for scrambling the periodicity of signals transmitted in the plurality of signal lines.

By the embodiment of the first aspect, signals in the plurality of signal lines can be scrambled according to the change information of the symbols of the signals in the plurality of signal lines, so that the periodicity of the signals in the signal lines is disturbed, electromagnetic radiation is reduced, and therefore, processing for reducing electromagnetic radiation can be performed in a flexible manner, and power consumption can be reduced.

As shown in fig. 1, in the present application, the apparatus 100 for suppressing electromagnetic radiation in signal lines may be applied to a transmitting-end chip 100A. For example, the apparatus 100 may be connected to the signal line 101A of the transmitting-side chip 100A. In addition, the apparatus 100 may be connected to the inverted signal line 102A of the transmitting-side chip 100A.

The number of the signal lines 101A may be 1 or more, and the number of the signal lines may be 2 or more, for example. When the number of the signal lines 101A is plural, each signal line can transmit a corresponding signal. In the present application, the number of the signal lines 101A can be represented as m, which is a natural number.

The signal line 101A may be a data line, or an address line, or other signal line that carries a signal that may be periodic. The signal transmitted on the signal line 101A is, for example, a digital signal. The digital signal may have a periodic code pattern, for example, a segment of signal transmitted on a signal line is 01010101, wherein 01 appears periodically, 0 represents low level, and 1 represents high level, so that the segment of signal has a periodic code pattern; for another example, each bit of data in a segment of the signal is xy01xy01xy01xy01, where x is 0 or 1, y is 0 or 1, xy01, occurring periodically, and thus, the segment of the signal has a periodic pattern; for another example, each bit of a segment of the signal is 001000101110, wherein there are no symbols appearing periodically, so the segment of the signal does not have a periodic pattern. When the signal in the signal line has a periodic code pattern, the signal line generates strong electromagnetic radiation.

The Inversion Signal lines 102A may have 1 line for transmitting an Inversion Signal (Inversion Signal), which is, for example, a digital Signal. For example, the flip signal line 102A may be a Data Bus flip line (Data Bus Inversion) in a double Data rate synchronous dynamic random access memory (DDR); for another example, the flip signal line 102A may be a Command Address line Bus flip line (cab i) in a double data rate memory for graphics of generation 6 (GDDR 6).

As shown in fig. 1, the rollover control signal ICS output by the dynamic scrambling control unit 11 may be sent to the signal scrambling unit 12. In addition, the switching control signal ICS output by the dynamic scrambling control unit 11 may also be applied to the switching control signal port 103A of the sending-end chip 100A, and sent to the switching control signal port 201A of the receiving-end chip 200A through the switching signal transmission link 104A. The flipping signal transmission link 104A can be a wired or wireless transmission link.

As shown in fig. 1, the signal scrambling unit 11 may include a flipping unit 121. Here, the inverting unit 121 inverts the signal on the signal line 101A in the case where the inversion control signal ICS is at the first level, for example, changes 0 in the signal to 1 and 1 to 0, that is, changes the high level in the signal to the low level and changes the low level to the high level. The first level is, for example, a high level.

Further, in the case where the inversion control signal ICS is at the second level, the signal on the signal line 101A is not inverted, that is, the signal maintains the original level or symbol. Wherein the second level is, for example, a low level.

As shown in fig. 1, the signal output by the flipping unit 121 may be applied to the signal port 105A of the transmitting-side chip 100A and transmitted to the signal port 202A of the receiving-side chip 200A through the signal transmission link 106A. The signal transmission link 106A can be a wired or wireless transmission link.

Although fig. 1 shows only one flip unit 121, in the present application, the number of flip units 121 is the same as that of the signal lines 101A, and for example, the number of flip units 121 is also m. In each of the inversion units 121, one input terminal is inputted with the inversion control signal ICS, and the other input terminal is inputted with the signal on the corresponding one of the signal lines 101A.

As shown in fig. 1, in at least one embodiment, the flipping unit 121 may include an xor gate. The truth table of the xor gate is shown in table 1 below.

TABLE 1

In table 1, a denotes the flip control signal ICS, b denotes the signal on the signal line 101A, and c denotes the signal output by the flip unit 112 (i.e., the signal sent to the receiving-side chip 200A). In table 1: when a (i.e., the inversion control signal ICS) is 1 (i.e., high level), b (i.e., the signal on the signal line 101A) is inverted to become c; when a is 1 (i.e., low), b does not flip and becomes c.

Further, as shown in fig. 1, in the receiving-end chip 200A, a restoring module 200 may be provided. The restoration module 200 may restore the signal received via the signal port 202A. If the signal scrambling unit 11 inverts the signal, the restoring module 200 also inverts the signal received through the signal port 202A, so as to restore the signal; if the signal scrambling unit 12 does not invert the signal, the restoring module 200 does not invert the signal received via the signal port 202A.

The restoration module 200 may perform restoration according to the rollover control signal ICS received via the rollover control signal port 201A. For example, if the flipping control signal ICS is at a first level (e.g., high level), the signal scrambling unit 11 flips the signal, and then the restoring module 200 also flips the signal received via the signal port 202A, thereby restoring the signal; if the flipping control signal ICS is at the second level (e.g., low level) and the signal scrambling unit 11 does not flip the signal, the restoring module 200 does not flip the signal received via the signal port 202A.

In at least one embodiment, as shown in fig. 1, the restoring unit 200 may include an exclusive or gate, one input terminal of which is input with the signal received via the signal port 202A, and the other input terminal of which is input with the flipping control signal ICS received via the flipping control signal port 201A, so that when the ICS is high level, the exclusive or gate will flip the signal received via the signal port 202A to realize the restoration of the signal, that is, the exclusive or gate can output the restored original signal.

In at least one embodiment, when the hamming distance of the symbols of the signals in the plurality of signal lines 101A at the first timing with respect to the symbols of the signals in the plurality of signal lines 101A at the second timing is greater than or equal to a first threshold, the signal in the plurality of signal lines 101A at the first timing is inverted by the inversion control signal ICS (for example, the ICS becomes high level) output by the dynamic scrambling control unit 11. Further, when the symbols of the signal at the current timing on the signal line 101A, the number of which is less than the first threshold value, among the plurality of signal lines 101A are different from the symbols of the signal at the previous timing, the second scrambling control unit 122 outputs the inversion control signal ICS of another state (for example, the ICS becomes low level), so that the signal at the current timing on the plurality of signal lines 101A is not inverted.

The first time is after the second time, for example, the first time may be a current time, the second time may be a previous time before the current time, and the symbol of the signal at the current time is adjacent to the symbol of the signal at the previous time in time series.

In this application, the hamming distance of the symbols of the signals in the plurality of signal lines 101A at the first time with respect to the symbols of the signals in the plurality of signal lines 101A at the second time may refer to: the number of symbols of the signals in the plurality of signal lines 101A at the first timing is different from the number of symbols of the signals in the plurality of signal lines 101A at the second timing. For example, in m signal lines 101A, if the symbol of the signal at the current time on n signal lines 101A is different from the symbol of the signal at the previous time, then the hamming distance of the signal symbol at the current time with respect to the symbol of the signal at the previous time is n. Wherein n is an integer greater than or equal to 0.

In at least one embodiment, the first threshold may be 50% of the total number of the plurality of signal lines 101A, and specifically, when the number of the plurality of signal lines 101A is m, the first threshold is m × 50%.

For example, there are m signal lines 101A, and in an extreme case, each signal line 101A is supposed to sequentially transmit a periodic code pattern with severe electromagnetic radiation, 0101010101, in a time interval from t1 to t10, where m lines simultaneously transmit 0 at time t1, m lines simultaneously transmit 1 at time t2, m lines simultaneously transmit 0 at time t3, m lines simultaneously transmit 1 at time t4, and the period is cycled down to t10.

For time t1 and time t2, time t1 corresponds to the second time and time t2 corresponds to the first time. At time t1, each signal line 101A transmits 0, at time t2, each signal line 101A transmits 1, the dynamic scrambling control unit 11 detects that the symbols (i.e., signals) of each signal line 101A at the current time are different from each other at the previous time, and the number of the m signal lines is m, that is, the hamming distance is m, which is greater than half m/2 (i.e., the first threshold) of the number of the signal lines 101A, at this time, the dynamic scrambling control unit 11 pulls the ICS high, so that the current signals of the m signal lines 101A are all inverted and transmitted, so at time t2, the symbol on the transmission link 106A actually transmitted by the transmitting-end chip becomes inverted 0, and finally the code patterns transmitted at time t1 and t2 become 00 instead of 01, that is 00 (01010101), where the signal in the parentheses is to be transmitted.

For time t2 and time t3, time t2 corresponds to the second time and time t3 corresponds to the first time. At the time t3, the dynamic scrambling control unit 11 detects that the last time t2 is 0 after the inversion, and the current time t3 is also 0, that is, the hamming distance is 0, pulls the ICS low, and does not perform any inversion on the normal transmission of the signal at the time t3, so that the code patterns sent by all signal lines at t1, t2, and t3 become 000, that is, 000 (1010101), where the signal in the parentheses is to be sent.

At the time t4, the second scrambling control unit 122 detects that the symbols at the time t4 of all the signal lines 101A at the current time are all 1, and compares the symbols at the time t3 of all the lines at the previous time with 0, where the number of the symbols is m, that is, the hamming distance is m, which is greater than half m/2 of the number of the signal lines, at this time, the second scrambling control unit 122 pulls up the ICS again, so that the m signal lines 101A are all inverted and then transmitted after the signals at the time t4, so that the symbols actually transmitted at the time t4 are inverted to 0, and at this time, the code patterns transmitted by all the signal lines at the time t1, t2, t3, and t4 become 0000 instead of the previous periodic code pattern 0101, that is, the repetition (010101), where the signals in the parentheses are to be transmitted.

Referring to the above description of t1 to t4, the apparatus 100 for suppressing electromagnetic radiation in a signal line of the present application can sequentially scramble signals at various times to scramble periodic code patterns, so that the original data 0101010101 becomes 0000000000 after being subjected to dynamic scrambling under the control of the second scrambling control unit 122, and therefore, the signal transmitted on the transmission link 106A is 0000000000, so that electromagnetic radiation is suppressed, and the receiving-end chip can perform reduction processing according to ICS to obtain the original signal 0101010101.

Fig. 2 to 4 are schematic diagrams of an example of performing the scrambling processing based on the control of the dynamic scrambling control unit. FIG. 2 is a schematic diagram of the original signals on the signal lines d 0-d 9 from time t0 to t 19; fig. 3 is a schematic diagram of the roll-over control signal ICS and the scrambled signal; fig. 4 is a schematic diagram of a signal after being restored by the restoring module 200.

In the example of fig. 2, the periodic patterns on the respective signal lines are the same or different.

As shown in FIG. 2, the signal lines d0 to d8 are different from the symbols at time t0 at time t1, that is, the Hamming distance of the signal symbols at time t1 is 9, which is greater than half 5 of the number of signal lines (for example, 10 lines), so that, as shown in FIG. 3, the value of ICS at time t1 is raised to 1, and the symbols of all the signal lines d0 to d9 at time t1 are inverted, so as to obtain the symbols t1:0001100110 after the inversion at time t 1.

As shown in FIG. 2, the signal at time t2 is compared with the signal after inverting the signal at time t1, i.e., t2:0001111111 is compared with t1:0001100110, and the Hamming distance of the signal symbol at time t2 is 3, which is less than half of the number of data lines 5, so the value of ICS at time t2 is pulled down to 0, and the signal at the original time t2 is not inverted.

Sequentially judging backwards in time sequence to obtain the signal of ICS 01010101010101 and the signals of each signal line 101A after scrambling, as shown by d 0-d 9 in FIG. 3.

In the receiving-end chip 200A, according to the signal of the ICS, when the ICS is 1, the received signal on the current signal line is inverted, and when the ICS is 0, the received signal on the current signal line is not inverted, so that the signal can be restored, and the restored signal is as shown in d0 to d9 in fig. 4.

As can be seen from FIG. 3, the periodic patterns on d0 to d9 in FIG. 2 are disturbed to a different extent, wherein d5 to d7 produce a periodic pattern with a longer number of bits, the intensity of the electromagnetic radiation of which is weakened. Therefore, the intensity of electromagnetic radiation generated by the 10 signal lines is improved as a whole.

In at least some other embodiments, the dynamic scrambling control unit 11 may further generate the flipping control signal ICS based on the hamming distance and by combining the number of signal lines with the first value of the symbol at the first time, so as to control the scrambling process. This can further reduce power consumption due to the scrambling process.

For example, when the hamming distance between the symbols of the signals in the plurality of signal lines 101A at the first time and the symbols of the signals in the plurality of signal lines 101A at the second time is greater than or equal to a first threshold value, and the symbols of the signals in the plurality of signal lines 101A having the first number of signals in the first time are a first value (the first value is, for example, 0 or 1), the inversion control signal (for example, the inversion control signal ICS is at a high level) output by the dynamic scrambling control unit 11 inverts the signals in the plurality of signal lines 101A at the first time. The first time is after the second time. The first threshold, the first time, the second time, and the hamming distance are explained as above. Further, the first number may be greater than or equal to a second threshold, for example, the second threshold is 50% of the total number of the plurality of signal lines 101A, and specifically, when the number of the plurality of signal lines 101A is m, the second threshold is m × 50%.

Fig. 5 to 7 are schematic diagrams of another example of the scrambling processing based on the control of the dynamic scrambling control unit. FIG. 5 is a schematic diagram of the original signals on the signal lines d0 to d9 from time t0 to t 19; fig. 6 is a schematic diagram of the roll-over control signal ICS and the scrambled signal; fig. 7 is a schematic diagram of the signal after being restored by the restoring module 200.

In the examples shown in fig. 5-7, the first value may be 0.

In the example of fig. 5, the periodic patterns on the respective signal lines are the same or different.

As shown in fig. 5, at time t1, 4 signal lines of which symbols have a first value (for example, 0) are present among the signal lines d0 to d9, and are lower than the second threshold (for example, the second threshold is 5), and thus the ICS is low. At time t2, 4 signal lines of which symbols have the first value (for example, 0) out of the signal lines d0 to d9 are smaller than the second threshold (for example, the second threshold is 5), and therefore the ICS is low.

At time t3, of the signal lines d0 to d9, 5 signal lines whose symbols are a first value (for example, 0) are equal to a second threshold value (for example, the second threshold value is 5); further, since the hamming distance of the symbols is equal to 5 (that is, at time t3, there are symbols on 5 signal lines different from the symbols of the signal at time t 2), which is equal to the first threshold (for example, the first threshold is 5), the ICS is pulled high, and the signals in the signal lines d0 to d9 corresponding to time t3 are all inverted.

At time t4, of the signal lines d0 to d9, 5 signal lines whose symbols are a first value (for example, 0) are equal to a second threshold value (for example, the second threshold value is 5); however, since the signal at time t4 and the signal obtained by inverting the signal at time t3 are compared and found to be identical, that is, since the hamming distance is 0 and smaller than the third threshold, the ICS is set to low level, and the signals in the signal lines d0 to d9 corresponding to time t4 are not inverted.

For the description of the other signals in fig. 5, reference is made to the above description of the signals corresponding to the times t1, t2, t3, t 4.

As shown in fig. 1, in at least one embodiment, the apparatus 100 for suppressing electromagnetic radiation in a signal line may further include an electromagnetic interference information obtaining unit 13.

The electromagnetic interference information acquisition unit 13 may acquire electromagnetic radiation information generated by signals transmitted in the plurality of signal lines 101A, and enable or disable the dynamic scrambling control unit 11 to output the flipping control signal ICS to the signal scrambling unit 12 based on the electromagnetic radiation information. Therefore, whether to perform the scrambling processing can be selected based on the electromagnetic radiation information, and the flexibility of the scrambling processing is larger.

As shown in fig. 1, the electromagnetic interference information obtaining unit 13 may include: a time-frequency analysis unit 131 and a judgment unit 132.

The time-frequency analysis unit 131 performs time-frequency analysis on the signals transmitted in the plurality of signal lines 101A to obtain frequency spectrum information of the signals as the electromagnetic radiation information. For the time-frequency analysis unit 131, the signals transmitted in the plurality of signal lines 101A may be: a real electrical signal transmitted in the signal line 101A by the transmitting-end chip 100A at the time of test or use; alternatively, in the stage of performing design verification on the transmitting-end chip 100A, an excitation signal is input to a simulation module (for example, a simulation module based on the register transfer level RTL programming language) during design verification, and the simulation module is made to be based on a signal on the signal line 101A generated by the circuit configuration of the transmitting-end chip 100A.

In at least one embodiment, the time-frequency analysis performed by the time-frequency analysis unit 131 may be, for example, a fourier transform or the like. The spectral information (i.e., electromagnetic radiation information) obtained by the time-frequency analysis may be, for example: the Power Spectral Density (PSD) of a signal in the frequency domain is used to represent the Power Density of the signal at different frequency points. In addition, the spectrum information may be other information reflecting the electromagnetic interference level, and the present application is not limited to the power spectral density.

The determining unit 132 enables the dynamic scrambling control unit 11 to output the inversion control signal ICS to the signal scrambling unit 12 when the electromagnetic radiation information does not satisfy a predetermined electromagnetic interference (EMI) requirement. Further, when it is determined that the electromagnetic radiation information satisfies a predetermined electromagnetic interference (EMI) requirement, the determination unit 132 may be caused to prohibit the dynamic scrambling control unit 11 from outputting the flipping control signal ICS to the signal scrambling unit 12.

For example, as shown in fig. 1, when the electromagnetic radiation information does not meet predetermined electromagnetic interference (EMI) requirements: the judging unit 132 may output a control signal to the switching circuit 14 so that the ICS output from the dynamic scrambling control unit 11 is applied to the signal scrambling unit 12 through the switching circuit 14; and/or, the judging unit 132 may output a control signal to the dynamic scrambling control unit 11 to operate the dynamic scrambling control unit 11, thereby generating the ICS.

For another example, as shown in fig. 1, when the electromagnetic radiation information satisfies a predetermined electromagnetic interference (EMI) requirement: the judging unit 132 may output a control signal to the switching circuit 14 so that the ICS output by the dynamic scrambling control unit 11 is not applied to the signal scrambling unit 12, and further, the switching circuit 14 may switch to be connected to the inverted signal line 102A so that the inverted signal line 102A is applied to the signal scrambling unit 12; and/or, the judgment unit 132 may output a control signal to the dynamic scrambling control unit 11 to stop the dynamic scrambling control unit 11 from operating, so that the ICS is not generated.

Further, the judgment unit 132 analyzes the acquired electromagnetic radiation information, and judges whether the electromagnetic radiation information satisfies a predetermined electromagnetic interference (EMI) requirement. For example, the power spectral density of the frequency domain can be analyzed to determine if there are discrete peak frequency radiating points: if the discrete peak frequency radiation points do not exist, the electromagnetic radiation information is judged to meet the preset electromagnetic interference requirement; if a discrete peak frequency radiation point exists, the discrete peak frequency radiation point may be further analyzed, for example, the amplitude (i.e., power density) of the discrete peak frequency radiation point is compared with the spectrum information of the output signal of the previous generation chip of the chip, if the amplitude is lower than or equal to the amplitude of the same frequency radiation point in the spectrum information of the output signal of the previous generation chip, it is determined that the chip meets a predetermined electromagnetic interference requirement, otherwise, it is determined that the electromagnetic radiation information does not meet the predetermined electromagnetic interference requirement, for example, the amplitude (i.e., power density) of the discrete peak frequency radiation point may be compared with a preset threshold, if the amplitude is lower than or equal to the preset threshold, it is determined that the electromagnetic radiation information meets the predetermined electromagnetic interference requirement, otherwise, it is determined that the chip does not meet the predetermined electromagnetic interference requirement.

Through the embodiments of the first aspect, signals in a plurality of signal lines can be subjected to scrambling processing according to the change information of the symbols of the signals in the plurality of signal lines, so that the periodicity of the signals in the signal lines is disturbed, electromagnetic radiation is reduced, and therefore, processing for reducing electromagnetic radiation can be performed in a flexible manner, and power consumption is reduced; in addition, the scrambling module of the present application does not need to set a descrambler at a signal receiving end (i.e., a receiving end chip), and does not introduce additional jitter in the time domain of the signal.

Embodiments of the second aspect

Embodiments of the second aspect of the present application provide a method for suppressing electromagnetic radiation in a signal line, which corresponds to the apparatus for suppressing electromagnetic radiation in a signal line of the embodiments of the first aspect. The method for suppressing the electromagnetic radiation in the signal line is applied to a transmitting end chip.

Fig. 8 is a schematic diagram of a method for suppressing electromagnetic radiation in a signal line according to an embodiment of a second aspect of the present application. As shown in fig. 8, the method for suppressing electromagnetic radiation in a signal line includes:

an operation 81 of generating an Inversion Control Signal (ICS) according to variation information of symbols of signals in a plurality of signal lines; and

operation 82, scrambling the signals transmitted in the plurality of signal lines according to the inversion control signal, where the scrambling is used to scramble the periodicity of the signals transmitted in the plurality of signal lines.

In at least one embodiment, operation 81 may be: generating the inversion control signal to invert the signals in the plurality of signal lines at a first time when a Hamming distance of symbols of the signals in the plurality of signal lines at the first time with respect to symbols of the signals in the plurality of signal lines at a second time is greater than or equal to a first threshold, wherein the first time is after the second time.

In at least another embodiment, operation 81 may be: generating the inversion control signal to invert the signals in the plurality of signal lines at a first time when a Hamming distance of symbols of the signals in the plurality of signal lines at the first time with respect to symbols of the signals in the plurality of signal lines at a second time is greater than or equal to the first threshold and symbols of the signals in the plurality of signal lines having a first number of signals at the first time are a first value, wherein the first time is after the second time.

In at least one embodiment, operation 82 may be: in the case where the inversion control signal is at a first level (e.g., high level), the signal on the signal line is inverted. Further, in the case where the inversion control signal is at a second level (for example, low level), the signal on the signal line is inverted

As illustrated in fig. 8, the method further comprises:

operation 83, performing time-frequency analysis on the signals transmitted in the plurality of signal lines to obtain frequency spectrum information of the signals, which is used as the electromagnetic radiation information; and

operation 84, when the electromagnetic radiation information does not meet a predetermined electromagnetic interference (EMI) requirement, causing the flipping control signal to control the scrambling process.

In at least one embodiment, the method for suppressing electromagnetic radiation in the signal line shown in fig. 8 may be applied to the transmitting-side chip 100A, so as to perform scrambling processing on the signal line. The signal after the scrambling process may be received by the receiving-side chip 200A, and the receiving-side chip 200A may perform a restoring process on the signal subjected to the scrambling process and received by the receiving-side chip 200A.

Embodiments of the third aspect

Embodiments of the third aspect provide an electronic device having the apparatus 100 for suppressing electromagnetic radiation in a signal line described in embodiments of the first aspect.

The electronic device may be, for example, a computer, server, workstation, laptop, smartphone, or the like; the embodiments of the present application are not limited thereto.

Fig. 9 is a schematic diagram of an electronic device. As shown in fig. 9, electronic device 900 may include: a processor (e.g., central Processing Unit (CPU)) 910 and memory 920; the memory 920 is coupled to the central processor 910. Wherein the memory 920 may store various data; further, a program 921 for information processing is stored, and the program 921 is executed under the control of the processor 910.

In some embodiments, the functionality of the apparatus 100 for suppressing electromagnetic radiation in a signal line is implemented integrated into the processor 910. Wherein the processor 910 is configured to implement the method as described in the embodiments of the first and third aspects.

In some embodiments, the apparatus 100 for suppressing electromagnetic radiation in a signal line is configured separately from the processor 910, for example, the apparatus 100 for suppressing electromagnetic radiation in a signal line may be configured as a chip connected to the processor 910, and the function of the apparatus 100 for suppressing electromagnetic radiation in a signal line is realized by the control of the processor 8910.

Further, as shown in fig. 9, the electronic device 900 may further include: input output (I/O) devices 930, a display 940, and the like; the functions of the above components are similar to those of the prior art, and are not described in detail here. It is worthy to note that electronic device 900 also does not necessarily include all of the components shown in FIG. 9; in addition, the electronic device 900 may further include components not shown in fig. 9, and reference may be made to the related art.

Embodiments of the present application also provide a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method in the embodiments of the second aspect when executing the computer program.

Embodiments of the present application also provide a computer readable storage medium storing a computer program which, when executed by a processor, implements the method in embodiments of the second aspect.

Embodiments of the present application also provide a computer program product comprising a computer program which, when executed by a processor, implements the method of embodiments of the second aspect.

In the technical scheme of each embodiment of the application, the data acquisition, storage, use, processing and the like all accord with relevant regulations of national laws and regulations.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above-mentioned embodiments are provided to further explain the objects, technical solutions and advantages of the present application in detail, and it should be understood that the above-mentioned embodiments are only examples of the present application and are not intended to limit the scope of the present application, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims

1. An apparatus for suppressing electromagnetic radiation in a signal line, applied to a transmitting-end chip, the apparatus comprising:

a dynamic scrambling control unit which generates an inversion control signal based on information of changes in symbols of signals in the plurality of signal lines; and

a signal scrambling unit that performs scrambling processing for scrambling a periodicity of signals transmitted in the plurality of signal lines according to the inversion control signal,

wherein, in a case where a Hamming distance of a symbol of the signals in the plurality of signal lines at a first time with respect to a symbol of the signals in the plurality of signal lines at a second time is greater than or equal to a first threshold,

the signal in the plurality of signal lines at the first time is inverted by the inversion control signal output by the dynamic scrambling control unit,

wherein the first time is after the second time.

2. The apparatus of claim 1,

in a case where a hamming distance of symbols of the signals in the plurality of signal lines at a first time with respect to symbols of the signals in the plurality of signal lines at a second time is greater than or equal to the first threshold value, and where symbols of the signals in the plurality of signal lines having a first number of signal lines at the first time are a first value,

wherein the first time is after the second time.

3. The apparatus of claim 1,

the signal scrambling unit includes:

and an inversion unit that inverts a signal on the signal line when the inversion control signal is at a first level.

4. The apparatus of claim 3,

the flipping unit includes an exclusive or gate and,

the first level is a high level.

5. The apparatus of claim 3,

the number of the flip units is the same as the number of the plurality of signal lines,

in each of the inversion units, the inversion control signal is input to one input terminal, and a signal of a corresponding one of the signal lines is input to the other input terminal.

6. The apparatus of claim 1, wherein the apparatus further comprises:

an electromagnetic interference information acquisition unit that acquires electromagnetic radiation information generated by signals transmitted in the plurality of signal lines, and enables or disables the dynamic scrambling control unit from outputting the flip control signal to the signal scrambling unit based on the electromagnetic radiation information.

7. The apparatus of claim 6, wherein the electromagnetic interference information acquisition unit comprises:

the time-frequency analysis unit is used for carrying out time-frequency analysis on the signals transmitted in the signal lines to obtain frequency spectrum information of the signals as the electromagnetic radiation information; and

and the judging unit enables the dynamic scrambling control unit to output the overturning control signal to the signal scrambling unit when the electromagnetic radiation information does not meet the preset electromagnetic interference requirement.

8. A system for suppressing electromagnetic radiation in a signal line, comprising:

the apparatus for suppressing electromagnetic radiation in a signal line as claimed in any one of claims 1 to 7; and

and the restoring module is applied to the receiving end chip and used for restoring the received signals.

9. A method for suppressing electromagnetic radiation in a signal line, which is applied to a transmitting end chip, is characterized by comprising the following steps:

generating a flip control signal according to change information of symbols of signals in the plurality of signal lines; and

scrambling the signals transmitted in the plurality of signal lines according to the inversion control signal, the scrambling being for scrambling the periodicity of the signals transmitted in the plurality of signal lines,

wherein generating the inversion control signal based on the change information of the symbols of the signals in the plurality of signal lines comprises:

in a case where a hamming distance of symbols of the signals in the plurality of signal lines at a first time with respect to symbols of the signals in the plurality of signal lines at a second time is greater than or equal to a first threshold value,

generating the inversion control signal to invert the signals in the plurality of signal lines at the first time,

wherein the first time is after the second time.

10. The method of claim 9,

in a case where a hamming distance of symbols of the signals in the plurality of signal lines at a first time with respect to symbols of the signals in the plurality of signal lines at a second time is greater than or equal to a first threshold value, and symbols of signals in a first number of signal lines in the plurality of signal lines at the first time are a first value,

generating the inversion control signal to invert signals in the plurality of signal lines at the first time,

wherein the first time is after the second time.

11. The method of claim 9,

scrambling the signals transmitted in the plurality of signal lines according to the inversion control signal, including:

and under the condition that the overturning control signal is at a first level, the signal on the signal line is overturned.

12. The method of claim 9, wherein the method further comprises:

performing time-frequency analysis on signals transmitted in the plurality of signal lines to obtain frequency spectrum information of the signals as electromagnetic radiation information; and

and when the electromagnetic radiation information does not meet the preset electromagnetic interference requirement, controlling the scrambling processing by the overturning control signal.

13. A method for suppressing electromagnetic radiation in a signal line, comprising:

the method for suppressing electromagnetic radiation in a signal line according to any one of claims 9 to 12, scrambling the signal on the signal line; and

and restoring the scrambled signal received by the receiving end chip.

14. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method of any of claims 9 to 12 when executing the computer program.

15. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 9 to 12.