Method and device for optimizing impedance of packaged transmission line, electronic equipment and storage medium

Abstract

The invention provides a packaged transmission line impedance optimization method and device, electronic equipment and a storage medium. The packaged transmission line impedance optimization method comprises the steps of obtaining respective characteristic impedance values of multiple sections of transmission lines in a signal link; determining a target transmission line from the multiple sections of transmission lines according to the characteristic impedance value; wherein the target transmission line is not matched with the impedance of the adjacent transmission lines in the signal transmission direction in the multiple sections of transmission lines; the signal transmission direction is the transmission direction of the signal in the signal link; determining a target impedance value according to the first transmission line and the second transmission line, and taking the target impedance value as an optimized characteristic impedance value; the first transmission line is a section of transmission line which is adjacent to the target transmission line and before the target transmission line in the signal transmission direction; the second transmission line is a section of transmission line adjacent to the target transmission line in the signal transmission direction and behind the target transmission line. The impedance mismatching of a signal link can be improved, signal reflection caused by the impedance mismatching is reduced, and the signal transmission quality is improved.

Description

Technical Field

[0001] The present application relates to the field of integrated circuit technology, and in particular to a method, device, electronic device and storage medium for optimizing the impedance of a packaged transmission line. Background Art

[0002] As the internal operating frequency of integrated circuits increases, signal transmission enters the high-speed era, and the quality of signal transmission becomes more and more sensitive to non-ideal parameters in the link. Due to wiring restrictions such as layout area, the transmission lines on the signal link have impedance mismatch problems such as corners and vias.

[0003] Transmission line impedance mismatch can easily cause signal reflection, resulting in the inability to raise the output voltage to the target level after the signal input voltage is transmitted through the transmission line, aggravating signal incompleteness, affecting signal transmission quality, and possibly causing the inability to judge the high and low levels of the signal. Summary of the invention

[0004] The embodiments of the present application provide a method, device, electronic device and storage medium for optimizing the impedance of a packaged transmission line, which can solve the problem of signal reflection caused by transmission line impedance mismatch, which affects the signal transmission quality and may cause the inability to judge the high and low levels of the signal.

[0005] In a first aspect, an embodiment of the present application discloses a method for optimizing the impedance of a package transmission line, the method comprising:

[0006] Obtain the characteristic impedance values ​​of multiple transmission lines in the signal link;

[0007] Determine a target transmission line from the multiple transmission lines according to the characteristic impedance value; wherein the impedance of the target transmission line is not matched with the transmission line adjacent to the multiple transmission lines in the signal transmission direction; the signal transmission direction is the transmission direction of the signal in the signal link;

[0008] A target impedance value is determined according to a characteristic impedance value of the first transmission line and a characteristic impedance value of the second transmission line, and the target impedance value is used as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

[0009] Optionally, the method further comprises:

[0010] Obtaining an input voltage of the signal link;

[0011] According to the input voltage and the characteristic impedance values ​​of each of the multiple transmission lines, a transmission equation of the signal link is obtained; wherein the transmission equation represents the relationship between the output voltage of the signal link and the input voltage; the transmission equation includes the characteristic impedance to be optimized of the target transmission line, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line;

[0012] The step of determining the target impedance value according to the characteristic impedance value of the first transmission line and the characteristic impedance value of the second transmission line includes:

[0013] The characteristic impedance of the target transmission line is optimized according to the transmission equation to obtain the target impedance value.

[0014] Optionally, determining the target impedance value according to the characteristic impedance value of the first transmission line and the characteristic impedance value of the second transmission line includes:

[0015] Determining the target impedance value according to a first formula, a characteristic impedance value of the first transmission line, and a characteristic impedance value of the second transmission line;

[0016] The first formula is:

[0017]

[0018] Among them, Z target represents the target impedance value, Z target-1 represents the characteristic impedance value of the first transmission line, Z target+1 represents the characteristic impedance value of the second transmission line.

[0019] Optionally, determining a target transmission line from the plurality of transmission lines according to the characteristic impedance value comprises:

[0020] Determining, according to the characteristic impedance value, a transmission line having abnormal characteristic impedance among the multiple transmission lines as an abnormal transmission line;

[0021] A transmission line adjacent to the abnormal signal line in the signal transmission direction is determined as the target transmission line.

[0022] Optionally, determining a transmission line adjacent to the abnormal signal line in the signal transmission direction as the target transmission line includes:

[0023] Determine a transmission line adjacent to the abnormal transmission line and located before the abnormal transmission line in the signal transmission direction as the target transmission line;

[0024] And / or, a transmission line adjacent to the abnormal transmission line and located after the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0025] Optionally, the obtaining of characteristic impedance values ​​of each of the plurality of transmission lines in the signal link includes:

[0026] Obtaining a package layout file of the plurality of transmission lines;

[0027] The characteristic impedance values ​​of the plurality of transmission lines are determined according to the package layout file.

[0028] Optionally, determining a target transmission line according to the characteristic impedance value includes:

[0029] averaging the characteristic impedance values ​​of the multiple transmission lines to obtain an impedance average value;

[0030] A transmission line whose difference between a characteristic impedance value and the impedance average value is greater than a preset difference threshold is regarded as an abnormal transmission line, and a section of the transmission line adjacent to the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0031] Optionally, the method further comprises:

[0032] Generate an optimized package layout file according to the target impedance value;

[0033] Eye diagram simulation is performed according to the optimized package layout file to obtain an optimized eye diagram result.

[0034] In a second aspect, an embodiment of the present application discloses a device for optimizing the impedance of a package transmission line, the device comprising:

[0035] A first acquisition module is used to acquire characteristic impedance values ​​of each of multiple transmission lines in a signal link;

[0036] A determination module, configured to determine a target transmission line from the plurality of transmission lines according to the characteristic impedance value; wherein the impedance of the target transmission line is not matched with an impedance of a transmission line adjacent to the plurality of transmission lines in a signal transmission direction; the signal transmission direction is a transmission direction of the signal in the signal link;

[0037] An optimization module is used to determine a target impedance value according to a characteristic impedance value of a first transmission line and a characteristic impedance value of a second transmission line, and use the target impedance value as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

[0038] Optionally, the device further comprises:

[0039] A second acquisition module, used to acquire the input voltage of the signal link;

[0040] A third acquisition module is used to acquire a transmission equation of the signal link according to the input voltage and the characteristic impedance values ​​of each of the multiple transmission lines; wherein the transmission equation represents the relationship between the output voltage and the input voltage of the signal link; the transmission equation includes the characteristic impedance to be optimized of the target transmission line, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line;

[0041] The optimization module is specifically used for:

[0042] The characteristic impedance of the target transmission line is optimized according to the transmission equation to obtain the target impedance value.

[0043] Optionally, the optimization module is specifically used for:

[0044] Determining the target impedance value according to a first formula, a characteristic impedance value of the first transmission line, and a characteristic impedance value of the second transmission line;

[0045] The first formula is:

[0046]

[0047] Among them, Z target represents the target impedance value, Z target-1 represents the characteristic impedance value of the first transmission line, Z target+1 represents the characteristic impedance value of the second transmission line.

[0048] Optionally, the determining module is specifically used to:

[0049] According to the characteristic impedance value, a transmission line with abnormal characteristic impedance among the multiple transmission lines is determined as an abnormal transmission line:

[0050] A transmission line adjacent to the abnormal signal line in the signal transmission direction is determined as the target transmission line.

[0051] Optionally, the determining module is specifically used to:

[0052] Determine a transmission line adjacent to the abnormal transmission line and located before the abnormal transmission line in the signal transmission direction as the target transmission line;

[0053] And / or, a transmission line adjacent to the abnormal transmission line and located after the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0054] Optionally, the first acquisition module is specifically used to:

[0055] Obtaining a package layout file of the plurality of transmission lines;

[0056] The characteristic impedance values ​​of the plurality of transmission lines are determined according to the package layout file.

[0057] Optionally, the determining module is specifically used to:

[0058] averaging the characteristic impedance values ​​of the multiple transmission lines to obtain an impedance average value;

[0059] A transmission line whose difference between a characteristic impedance value and the impedance average value is greater than a preset difference threshold is regarded as an abnormal transmission line, and a section of the transmission line adjacent to the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0060] Optionally, the device further comprises:

[0061] A generation module, used to generate an optimized package layout file according to the target impedance value;

[0062] The simulation module is used to perform eye diagram simulation according to the optimized package layout file to obtain an optimized eye diagram result.

[0063] In a third aspect, an embodiment of the present application further discloses an electronic device, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus; the memory is used to store executable instructions, and the executable instructions enable the processor to execute the method for optimizing the package transmission line impedance as described in the first aspect.

[0064] In a fourth aspect, an embodiment of the present application further discloses a storage medium. When instructions in the storage medium are executed by a processor of an electronic device, the processor is enabled to execute the method for optimizing the impedance of a packaged transmission line as described in the first aspect.

[0065] The embodiments of the present application include the following advantages:

[0066] The embodiment of the present application provides a method, device, electronic device and storage medium for optimizing the impedance of a packaged transmission line. By obtaining the characteristic impedance values ​​of each of the multiple transmission lines in the signal link, the transmission line whose impedance does not match that of the adjacent transmission line in the transmission direction of the signal link can be determined as the target transmission line from the multiple transmission lines according to the characteristic impedance value. The impedance mismatch of the transmission line is likely to cause signal reflection. In this embodiment, the target impedance value can be determined according to the characteristic impedance values ​​of the transmission lines adjacent to the target transmission line, that is, the first transmission line and the second transmission line, and the target impedance value is used as the characteristic impedance value of the target transmission line after being optimized, so as to optimize the characteristic impedance value of the target transmission line. Since the transmission lines involved in the optimization include the first transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction, and the second transmission line adjacent to the target transmission line and located after the target transmission line, in this way, the characteristic impedance value of the target transmission line after being optimized can be made to be more matched with the characteristic impedance values ​​of the transmission lines before and after the target transmission line, thereby improving the impedance mismatch of the signal link, reducing the signal reflection caused by the impedance mismatch, and improving the transmission quality of the signal in the link. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0068] Figure 1 It is a flowchart of the steps of a method for optimizing the impedance of a package transmission line provided in an embodiment of the present application;

[0069] Figure 2 It is a structural diagram of a signal link provided by an embodiment of the present application;

[0070] Figure 3 It is a schematic diagram of an eye diagram provided in an embodiment of the present application;

[0071] Figure 4 is a schematic diagram of the structure of another signal link provided in an embodiment of the present application;

[0072] Figure 5 It is a structural diagram of another signal link provided in an embodiment of the present application;

[0073] Figure 6 is a structural diagram of another signal link provided in an embodiment of the present application;

[0074] Figure 7 is another eye diagram schematic diagram provided in an embodiment of the present application;

[0075] Figure 8 is a schematic diagram of a package transmission line impedance optimization device provided in an embodiment of the present application;

[0076] Fig. 9 It is a structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0078] Figure 1 is a flowchart of a method for optimizing the impedance of a package transmission line provided in an embodiment of the present application, such as Figure 1 As shown, the optimization method of the package transmission line impedance includes:

[0079] Step S1, obtaining characteristic impedance values ​​of each of multiple transmission lines in a signal link.

[0080] Step S2, determining a target transmission line from multiple transmission lines according to a characteristic impedance value; wherein the impedance of the target transmission line is not matched with an impedance of an adjacent transmission line in the multiple transmission lines in a signal transmission direction; and the signal transmission direction is a transmission direction of the signal in the signal link.

[0081] Step S3, determining a target impedance value according to the characteristic impedance value of the first transmission line and the characteristic impedance value of the second transmission line, and using the target impedance value as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

[0082] In some embodiments, the signal link may be a transmission path of the signal, such as a signal being transmitted from the output end of one circuit element to the input end of another circuit element in a circuit, and passing through multiple transmission lines in the middle. The present embodiment does not limit the shape, length and other parameters of the multiple transmission lines. In practical applications, the transmission lines may be divided according to the wiring conditions of the circuit. For example, each line extending in a straight line direction may be determined as a transmission line. This is only an example, and the present application embodiment does not limit this.

[0083] It should be noted that characteristic impedance belongs to the concept of long-line transmission. In the high-frequency range, during the signal transmission process, when the signal reaches the place along the transmission line, an instantaneous current will be generated between the transmission line and the reference plane (power supply or ground plane) due to the establishment of an electric field. If the transmission line is isotropic, then as long as the signal is transmitted, there will always be a current I. If the output voltage of the signal is Vout, during the signal transmission process, the transmission line will be equivalent to a resistor with a size of Vout / I. This equivalent resistor is called the characteristic impedance Z of the transmission line. During the transmission of the signal, if the characteristic impedance on the transmission path changes, the signal will be reflected at the place where the impedance is discontinuous. Impedance discontinuity is also called impedance mismatch. It should be noted that characteristic impedance is an inherent property of the transmission line, and the characteristic impedance is only related to the material properties, dielectric constant, and unit length capacitance of the transmission line, but has nothing to do with the length of the transmission line.

[0084] In some embodiments, characteristic impedance values ​​of different transmission lines can be obtained through characteristic impedance simulation software according to the input voltage Vin, output voltage Vout of the signal link and the structure of the multi-segment transmission line. Specifically, the multi-segment transmission line can be simulated in the simulation software, and then the input voltage Vin and output voltage Vout of the signal link composed of the multi-segment transmission line are set, and the simulation software can simulate and output the characteristic impedance value of each transmission line. For example, Figure 2 The signal chain shown in the figure includes n transmission lines, where n is a positive integer. The characteristic impedance of each transmission line is represented by Z0, Z1, Z2, Z3, Z4, ... Zn. The simulation software can be used to simulate the following: Figure 2 The signal chain shown is simulated to output the values ​​of Z0, Z1, Z2, Z3, Z4, ... Zn, thereby obtaining the characteristic impedance values ​​of the n transmission lines. This is only an example, and the embodiments of the present application do not limit this.

[0085] In some embodiments, the characteristic impedance of the transmission line can be calculated based on the approximate formula of the stripline or microstrip line. For example, the following formula (1) is a formula for calculating the characteristic impedance of the microstrip line. For example, the following formula (2) is a formula for calculating the characteristic impedance of the stripline.

[0086]

[0087] Where Z is the characteristic impedance in ohms (Ω). h is the dielectric thickness between the signal line and the plane in mils. ω is the line width in mils. b is the distance between the planes in mils. t is the metal thickness in mils. ε is the dielectric constant.

[0088] For example, Figure 2The signal chain shown can calculate the characteristic impedance Z of each transmission line segment according to the parameters such as the dielectric thickness h, line width ω, and metal thickness t of each of the n transmission lines, and obtain the characteristic impedance value of each of the n transmission lines.

[0089] Optionally, step S1 may include the following steps:

[0090] Sub-step A1, obtaining a package layout file of multiple transmission lines;

[0091] Sub-step A2, determining the characteristic impedance values ​​of the multiple transmission line segments according to the package layout file.

[0092] In some embodiments, the method for optimizing the impedance of a packaged transmission line provided in this embodiment can be performed by an electronic device. The package layout file can be pre-stored in a storage device of the electronic device, and the electronic device can directly read the package layout file from the storage device. Among them, the package layout file usually includes the structural parameters of the transmission line, and the transmission line parameters can include parameters such as the dielectric thickness h, line width ω, metal thickness t, etc. as shown in formula (1) or (2), and even the package layout file directly includes the characteristic impedance parameters of the transmission line, and the characteristic impedance parameters include the characteristic impedance value.

[0093] In some embodiments, if the package layout file includes characteristic impedance parameters, the characteristic impedance value of each transmission line can be directly obtained from the package layout file. If the package layout file only includes parameters such as dielectric thickness h, line width ω, metal thickness t, etc., the characteristic impedance value of each transmission line can be calculated according to the above formula (1) or (2). This is only an example, and the embodiments of the present application are not limited to this.

[0094] In the embodiment of the present application, the package layout files of the multiple transmission lines are obtained, and the characteristic impedance values ​​of the multiple transmission lines are determined according to the package layout files. In this way, the characteristic impedance values ​​of the multiple transmission lines can be obtained from the package layout files in a simple and convenient manner, which can speed up the acquisition of the characteristic impedance values, thereby improving the optimization efficiency of the package transmission line impedance optimization method provided in the embodiment of the present application.

[0095] For example, there is a 120Ω high impedance transmission line on the package layout. Through the time domain simulation of signal integrity, the following can be obtained: Figure 3 In the eye diagram shown, the eye height and eye width of the eye diagram are greatly affected by the signal reflection caused by the impedance mismatch between this section of transmission line and other transmission lines. Figure 3 At 0.8 nanoseconds (ns) on the horizontal axis, there is a problem that the output voltage Vout on the vertical axis cannot reach the high level judgment level.

[0096] Optionally, step S2 may include the following steps:

[0097] Sub-step B1, determining a transmission line with abnormal characteristic impedance among the multiple transmission lines as an abnormal transmission line according to the characteristic impedance value;

[0098] Sub-step B2: determining a transmission line adjacent to the abnormal signal line in the signal transmission direction as a target transmission line.

[0099] In some embodiments, after obtaining the characteristic impedance values ​​of multiple transmission lines, the characteristic impedance values ​​of the multiple transmission lines can be compared with each other. If there is an obvious abnormal value, the abnormal value is manifested as a large difference from other characteristic impedance values, and the transmission line corresponding to the abnormal value is discontinuous with the impedance of other transmission lines, then the characteristic impedance of the transmission line is abnormal. In this embodiment, the transmission line with abnormal characteristic impedance is called an abnormal transmission line.

[0100] For example, for Figure 2 The signal chain shown can be determined based on the package layout file. Figure 4 The multi-section transmission line structure shown in the figure, where Z0 = 50Ω, Z1 = 50Ω, Z2 = 120Ω, and Z3 = 50Ω. It can be seen that the value of Z2 is significantly greater than the characteristic impedance values ​​of other transmission lines, so the transmission line corresponding to Z2 is an abnormal transmission line.

[0101] Optionally, characteristic impedance values ​​of multiple transmission lines are averaged to obtain an impedance average value; and a transmission line whose difference between the characteristic impedance value and the impedance average value is greater than a preset difference threshold is regarded as an abnormal transmission line.

[0102] In some embodiments, the abnormal value can be determined from the characteristic impedance values ​​of multiple transmission lines by averaging, for example, taking the arithmetic mean as the impedance average. The preset difference threshold can be determined based on the transmission line parameters, for example Figure 4 In the signal link shown, 5Ω can be used as the preset difference threshold. The characteristic impedance value of each transmission line segment is subtracted from the impedance average value, and the difference is compared with the preset difference threshold. If the difference corresponding to a certain transmission line segment is greater than the preset difference threshold, the characteristic impedance value of the transmission line segment is an abnormal value, and the transmission line segment is an abnormal transmission line with abnormal characteristic impedance.

[0103] In some embodiments, in the signal transmission direction, the transmission line adjacent to the abnormal transmission line is the target transmission line to be optimized in this embodiment. In this way, the abnormal transmission line can be first determined from the multiple transmission lines according to the characteristic impedance values ​​of the multiple transmission lines, and then the transmission line adjacent to the abnormal transmission line is determined as the target transmission line. The signal transmission direction refers to the direction of the signal from the input signal link to the output from the signal link, that is, the transmission direction of the signal in the signal link.

[0104] In some embodiments, the position where the target transmission line is connected to the abnormal transmission line is the position where the impedance is discontinuous in the signal link, and the characteristic impedance of the target transmission line is discontinuous with the characteristic impedance of the abnormal transmission line, so the impedance of the target transmission line and the impedance of the abnormal transmission line do not match. When there are multiple sections of abnormal transmission lines in the signal link, the target transmission line adjacent to each section of the abnormal transmission line can be optimized separately, thereby improving the impedance mismatch of the signal link, reducing the signal reflection caused by the impedance mismatch, and improving the transmission quality of the signal in the link. Therefore, the integrity of the output signal of the signal link can be improved, which helps to raise the voltage of the output signal to the target level, so as to clearly and accurately judge the high and low levels of the output signal.

[0105] Optionally, sub-step B2 may include the following steps:

[0106] Determine a transmission line adjacent to and before the abnormal transmission line in the signal transmission direction as a target transmission line;

[0107] And / or, a transmission line adjacent to and located after the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0108] In some embodiments, the number of target transmission lines corresponding to a section of abnormal transmission line may be one section or two sections, for example, the target transmission line may be a section of transmission line before and / or after the abnormal transmission line. The number and position of the target transmission lines may be selected based on the difference in characteristic impedance values ​​between the abnormal transmission line and the transmission lines before and after it.

[0109] For example, if the characteristic impedance value of the abnormal transmission line is significantly different from that of the transmission line before it, the transmission line adjacent to the abnormal transmission line and located before the abnormal transmission line can be determined as the target transmission line. If the characteristic impedance value of the abnormal transmission line is significantly different from that of the transmission line after it, the transmission line adjacent to the abnormal transmission line and located after the abnormal transmission line can be determined as the target transmission line. Of course, if the characteristic impedance difference between the abnormal transmission line and the adjacent transmission lines before and after it is very large, the transmission lines before and after the abnormal transmission line can also be determined as target transmission lines, and the characteristic impedances of the abnormal transmission line and the adjacent transmission lines can be optimized respectively, so that the impedances of the abnormal transmission line and the adjacent transmission lines after optimization are more continuous, thereby improving the impedance matching of the signal link. Among them, the characteristic impedance difference can refer to the relevant description of the preset difference threshold value mentioned above. If the difference between the characteristic impedance values ​​of the abnormal transmission line and the adjacent transmission line is greater than the preset difference threshold value, it is considered that the characteristic impedance difference between the abnormal transmission line and the adjacent transmission line is relatively large.

[0110] like Figure 4As shown, the signal is input from the left side of the link, the input current is Vin, and the signal is output from the right side of the link, the output current is Vout, so the transmission direction is from left to right. In this embodiment, Z1 adjacent to Z2 can be used as the target transmission line, and the optimization target is to obtain the characteristic impedance value of Z1 after optimization, that is, the target impedance value, which can be recorded as Z target .like Figure 5 As shown, Z target Replace the original characteristic impedance Z1 of the target transmission line and get Figure 5 The optimized signal chain is shown.

[0111] In some embodiments, a section of a transmission line adjacent to the abnormal transmission line in the signal transmission direction may be determined as the target transmission line, wherein the target transmission line may be a section of the transmission line before the abnormal transmission line, or a section of the transmission line after the abnormal transmission line. Figure 4 In the signal chain shown, Z0=50Ω, Z1=50Ω, Z2=120Ω, and Z3=50Ω. The transmission line corresponding to Z2 is an abnormal transmission line, and the transmission line corresponding to Z1 and / or Z3 can be used as a target transmission line.

[0112] In an embodiment of the present application, a transmission line with abnormal characteristic impedance among multiple transmission lines is determined as an abnormal transmission line according to the characteristic impedance value, and a section of the transmission line adjacent to the abnormal transmission line in the signal transmission direction is determined as a target transmission line. In this way, the characteristic impedance of the target transmission line can be optimized so that the characteristic impedance value of the target transmission line and the characteristic impedance value of the abnormal transmission line are more continuous, thereby improving the impedance matching between the target transmission line and the abnormal transmission line.

[0113] In some embodiments, the impedance mismatch between the target transmission line and the abnormal transmission line actually means that the impedance difference between the target transmission line and the abnormal transmission line at the connection position is large, and there is an impedance mismatch problem. In this embodiment, by optimizing the characteristic impedance value of the target transmission line, the difference between the optimized target impedance value of the target transmission line and the characteristic impedance value of the abnormal transmission line is reduced, and the continuity of the target transmission line and the abnormal transmission line in the signal link in the characteristic impedance is improved. In this way, the signal reflection caused by the impedance mismatch at the connection position between the target transmission line and the abnormal transmission line can be reduced, and the signal transmission quality can be improved.

[0114] Optionally, before step S3, the method further includes:

[0115] Step S4, obtaining the input voltage of the signal link;

[0116] Step S5, obtaining a transmission equation of the signal link according to the input voltage and the characteristic impedance values ​​of the multiple transmission lines; wherein the transmission equation represents the relationship between the output voltage and the input voltage of the signal link; the transmission equation includes the characteristic impedance to be optimized of the target transmission line, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line;

[0117] Step S3 may include the following steps:

[0118] Sub-step C1, optimizing the characteristic impedance of the target transmission line according to the transmission equation to obtain a target impedance value.

[0119] In some embodiments, if the signal link includes a complete link between two circuit elements, the input voltage of the signal link is the voltage of one of the circuit elements input to the signal link, and the input voltage of the signal link can be obtained by measuring the voltage at the output end of the circuit element. Alternatively, if the signal link is not a complete link between two circuit elements, the input voltage of the signal link of this embodiment can be calculated based on the transmission equation corresponding to the output end of the circuit element and the transmission path before the signal link of this embodiment. Alternatively, the input end of the signal link can be directly measured to obtain the voltage value of the signal input to the signal link as the input voltage of the signal link in this embodiment.

[0120] In some embodiments, the relationship between the output voltage and input voltage of the signal link can be expressed by a transmission equation. When the input voltage Vin of the signal link and the characteristic impedance values ​​of multiple transmission lines in the signal link are known, the output voltage Vout of the signal link can be obtained, as shown in the following formula (3).

[0121] Among them, the characteristic impedances of the n transmission lines are respectively expressed as Z0, Z1, Z2, Z3, Z4...Zn.

[0122]

[0123] In this embodiment, the characteristic impedance of the target transmission line to be optimized in the transmission equation is taken as an unknown quantity, denoted as Z target , and replace the original characteristic impedance value of the target transmission line in the transmission equation with the unknown quantity. For example, transform formula (3) and use Z target By replacing the original characteristic impedance value Z of the target transmission line, the following formula (4) can be obtained. Formula (4) represents the transmission equation of the signal link including n transmission lines provided by this embodiment.

[0124]

[0125] The transmission equation (4) includes the characteristic impedance of the target transmission line to be optimized, denoted as Z target, the characteristic impedance value Z of the first transmission line target-1 , and the characteristic impedance value Z of the second transmission line target+1 .

[0126] In some embodiments, the characteristic impedance of the target transmission line can be optimized according to the replaced transmission equation to obtain the target impedance value, thereby obtaining the optimized characteristic impedance value of the target transmission line. Specifically, the transmission equation that replaces the unknown quantity, i.e., the characteristic impedance to be optimized, can be derived to obtain the derivative function of the characteristic impedance to be optimized, as shown in the following formula (5). Then, the extreme value of the derivative function is obtained, and the characteristic impedance value corresponding to the extreme value point is the target impedance value, and the target impedance value can be used as the optimized characteristic impedance value of the target transmission line.

[0127]

[0128] Specifically, the extreme point can be substituted into the second-order derivative function to determine whether it is a maximum or a minimum. Calculation shows that since the result of substituting into the second-order derivative function is always a negative value, this extreme point is a maximum point, and thus the value of the extreme point is the target impedance value sought.

[0129] In some embodiments, if the signal link includes multiple sections of abnormal transmission lines, the target transmission lines adjacent to each section of the abnormal transmission line can be optimized separately, so that the optimization process of the entire signal link can be divided into multiple sub-processes for optimizing the characteristic impedance of the target transmission line respectively, which can simplify the processing difficulty of the optimization process. For example, the three transmission lines of the target transmission line, the abnormal transmission line and the transmission line adjacent to the target transmission line can be regarded as a signal sub-link, and the target transmission line is located in the middle of the signal sub-link. The characteristic impedance of the target transmission line to be optimized in the signal sub-link is an unknown quantity, while the characteristic impedance value of the abnormal transmission line and the characteristic impedance values ​​of other transmission lines are known quantities. By optimizing the characteristic impedance of the target transmission line, the impedance continuity of the signal sub-link where the target transmission line is located can be improved, so that the impedance of the target transmission line and its adjacent transmission lines matches, including the impedance matching of the target transmission line and the abnormal transmission line.

[0130] It should be noted that if there are two consecutive abnormal transmission lines in the signal link, these two abnormal transmission lines can be regarded as one abnormal transmission line, and then a signal sub-link is divided for it. The signal sub-link includes the target transmission line and other transmission lines with known characteristic impedance values. The characteristic impedance of the target transmission line is optimized according to the transmission equation to obtain the target impedance value.

[0131] by Figure 5 For example, the abnormal transmission line (120Ω) and the target transmission line (Z target), and the transmission line (50Ω) adjacent to the target transmission line as a signal sub-link, and then the target transmission line is optimized according to the transmission equation of the signal sub-link to obtain Z target The value of is the target impedance value.

[0132] Optionally, step S3 may include the following steps:

[0133] Sub-step C2, determining a target impedance value according to the first formula, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line;

[0134] The first formula is:

[0135]

[0136] Among them, Z target Indicates the target impedance value, Z target-1 represents the characteristic impedance value of the first transmission line, Z target+1 represents the characteristic impedance value of the second transmission line.

[0137] For formula (5), the characteristic impedance values ​​of each transmission line in the signal link can be substituted into formula (5) and simplified to obtain the following formula (6). Where G represents the product value calculated by substituting the characteristic impedance values ​​of each transmission line into the formula. Where Z target-1 represents the characteristic impedance value of the first transmission line adjacent to and before the target transmission line in the signal transmission direction, Z target+1 represents the characteristic impedance value of the second transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction. Further finding the extreme value of formula (4), that is, setting the derivative function to 0, the following formula (7) can be obtained, which is the first formula of this embodiment.

[0138]

[0139] In the embodiment of the present application, since the transmission equation characterizes the relationship between the output voltage and the input voltage of the signal link, the transmission equation includes the characteristic impedance of the target transmission line to be optimized, and the input voltage and the characteristic impedance values ​​of the multiple transmission lines are obtained to determine the influence of the characteristic impedance of the target transmission line on the signal transmission process in the signal link. Then, according to the transmission equation, the characteristic impedance of the target transmission line is optimized to obtain the target impedance value, so that the target impedance value is used as the optimized characteristic impedance value of the target transmission line, so that the optimized target transmission line can be more matched with the transmission equation of the signal link, thereby improving the transmission quality of the signal in the signal link.

[0140] In some embodiments, the target transmission line can be optimized according to the characteristic impedance values ​​of the transmission lines near the target transmission line, wherein the transmission lines participating in the optimization can be selected according to the position of the target transmission line in the signal link. Specifically, if the target transmission line is a transmission line other than the first and last segments in the signal link, then a segment of the transmission line before and after the target transmission line can be used as the transmission lines participating in the optimization, so that the abnormal transmission lines adjacent to the target transmission line are also included, and the impedance matching of these segments of the transmission lines can be improved.

[0141] In some embodiments, the first transmission line is a transmission line located before the target transmission line in the signal transmission direction, that is, the first transmission line receives the signal before the target transmission line. The second transmission line is a transmission line located after the target transmission line in the signal transmission direction, that is, the second transmission line receives the signal after the target transmission line. Then the signal is transmitted in sequence by the first transmission line, the target transmission line, and the second transmission line.

[0142] For example, Figure 2 The signal chain shown in FIG. 1 is a graph showing the optimized characteristic impedance value of the target transmission line, i.e., the target impedance value, as Z. target , then the characteristic impedance of the first transmission line is Z target-1 , the characteristic impedance value of the second transmission line is recorded as Z target+1 .

[0143] In some embodiments, the characteristic impedance value Z of the first transmission line is target-1 and the characteristic impedance value Z of the second transmission line target+1 Multiply and take the square root of the product to get the target impedance value Z target The characteristic impedance value Z of the first transmission line is known. target-1 and the characteristic impedance value Z of the second transmission line target+1 , Z target-1 and Z target+1 Substitute the value of into formula (7) to obtain the target impedance value Z target。

[0144] For example, Figure 5 As shown, Z target-1 =Z0=50Ω, Z target+1 = Z2 = 120Ω, then the target transmission line Z target As shown in formula (8), the target impedance value of the target transmission line is calculated to be 77.46Ω.

[0145]

[0146] Optionally, the method further comprises:

[0147] Step S6, generating an optimized package layout file according to the target impedance value;

[0148] Step S7, performing eye diagram simulation according to the optimized package layout file to obtain an optimized eye diagram result.

[0149] In some embodiments, the target impedance value is the characteristic impedance value of the target transmission line after optimization, and the structural parameters of the target transmission line can be adjusted according to the target impedance value so that the characteristic impedance value of the adjusted target transmission line is equal to the target impedance value. Figure 6 As shown, Figure 2 After optimizing the transmission line corresponding to Z1, the characteristic impedance value is Z target The target transmission line.

[0150] Specifically, for the target transmission line, the simulation software can be used to simulate the parameter adjustment so that the adjusted transmission line parameters match the target impedance value, that is, the characteristic impedance value of the adjusted target transmission line is equal to the target impedance value. Alternatively, referring to formulas (1) and (2), the target impedance value can be used as the characteristic impedance value Z. When the characteristic impedance value Z is known, any one of the parameters such as the dielectric thickness h, the line width ω, and the metal thickness t can be taken as an unknown quantity, and the optimized transmission line parameters can be obtained by calculating the unknown quantity. This is only an example, and the embodiments of the present application are not limited to this.

[0151] In some embodiments, after obtaining the optimized transmission line parameters of the target transmission line according to the target resistance value, a package layout file can be generated according to the parameters of other transmission lines and the optimized transmission line parameters as the optimized package layout file corresponding to the signal link. Alternatively, the transmission line parameters corresponding to the target transmission line can be updated on the basis of the original package layout file of the signal link to the optimized transmission line parameters, thereby obtaining the optimized package layout file. This is only an example, and the embodiments of the present application are not limited to this.

[0152] In some embodiments, after the signal link is optimized, the signal integrity time domain simulation can be performed on the signal link. Specifically, the eye diagram simulation can be performed according to the optimized package layout file to obtain the optimized eye diagram result, and then the waveform of the output signal after the signal is transmitted through the signal link, the size of the output voltage Vout, the eye height and eye width of the eye diagram, etc. can be observed according to the optimized eye diagram structure, thereby analyzing the optimization effect of the signal link.

[0153] For example, for Figure 5 The signal chain shown, Z0 = 50Ω, Z target =77.46Ω, Z2=120Ω, Z3=50Ω, and the eye diagram of the signal link is simulated, and the following is obtained: Figure 7 Compared with the eye diagram before optimization, Figure 3 The eye diagram shown in the figure shows that the eye height and eye width have been greatly improved. Figure 7At 0.8 nanoseconds (ns) on the horizontal axis, the output voltage Vout can be raised to about 1V, compared to Figure 3 There is a big rise in the 0.5V.

[0154] In an embodiment of the present application, by obtaining the characteristic impedance values ​​of each of the multiple transmission lines in the signal link, the transmission line whose impedance does not match that of the adjacent transmission line in the transmission direction of the signal in the signal link can be determined as the target transmission line according to the characteristic impedance value, and the impedance mismatch of the transmission line is likely to cause signal reflection. In this embodiment, the target impedance value can be determined according to the characteristic impedance values ​​of the transmission lines adjacent to the target transmission line, that is, the first transmission line and the second transmission line, and the target impedance value is used as the characteristic impedance value of the target transmission line after being optimized, so as to optimize the characteristic impedance value of the target transmission line. Since the transmission lines involved in the optimization include the first transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction, and the second transmission line adjacent to the target transmission line and located after the target transmission line, in this way, the characteristic impedance value of the target transmission line after being optimized can be made to be more matched with the characteristic impedance values ​​of the transmission lines before and after the target transmission line, thereby improving the impedance mismatch of the signal link, reducing the signal reflection caused by the impedance mismatch, and improving the transmission quality of the signal in the link.

[0155] See also Figure 8 The embodiment of the present application further provides a package transmission line impedance optimization device 10, the package transmission line impedance optimization device 10 comprising:

[0156] The first acquisition module 101 is used to acquire the characteristic impedance value of each of the multiple transmission lines in the signal link;

[0157] A determination module 102 is used to determine a target transmission line from a plurality of transmission lines according to the characteristic impedance value; wherein the impedance of the target transmission line is not matched with an impedance of a transmission line adjacent to the plurality of transmission lines in a signal transmission direction; the signal transmission direction is a transmission direction of the signal in the signal link;

[0158] The optimization module 103 is used to determine a target impedance value according to a characteristic impedance value of the first transmission line and a characteristic impedance value of the second transmission line, and use the target impedance value as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

[0159] Optionally, the device further comprises:

[0160] A second acquisition module, used to acquire the input voltage of the signal link;

[0161] A third acquisition module is used to acquire a transmission equation of the signal link according to the input voltage and the characteristic impedance values ​​of each of the multiple transmission lines; wherein the transmission equation represents the relationship between the output voltage and the input voltage of the signal link; the transmission equation includes the characteristic impedance to be optimized of the target transmission line, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line;

[0162] The optimization module 103 is specifically used for:

[0163] The characteristic impedance of the target transmission line is optimized according to the transmission equation to obtain the target impedance value.

[0164] Optionally, the optimization module 103 is specifically used for:

[0165] Determining the target impedance value according to a first formula, a characteristic impedance value of the first transmission line, and a characteristic impedance value of the second transmission line;

[0166] The first formula is:

[0167]

[0168] Among them, Z target represents the target impedance value, Z target-1 represents the characteristic impedance value of the first transmission line, Z target+1 represents the characteristic impedance value of the second transmission line.

[0169] Optionally, the determining module 102 is specifically configured to:

[0170] Determining, according to the characteristic impedance value, a transmission line having abnormal characteristic impedance among the multiple transmission lines as an abnormal transmission line;

[0171] A transmission line adjacent to the abnormal signal line in the signal transmission direction is determined as the target transmission line.

[0172] Optionally, the determining module 102 is specifically configured to:

[0173] Determine a transmission line adjacent to the abnormal transmission line and located before the abnormal transmission line in the signal transmission direction as the target transmission line;

[0174] And / or, a transmission line adjacent to the abnormal transmission line and located after the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

[0175] Optionally, the first acquisition module 101 is specifically used to:

[0176] Obtaining a package layout file of the plurality of transmission lines;

[0177] The characteristic impedance values ​​of the plurality of transmission lines are determined according to the package layout file.

[0178] Optionally, the package transmission line impedance optimization device 10 further includes:

[0179] A generation module, used to generate an optimized package layout file according to the target impedance value;

[0180] The simulation module is used to perform eye diagram simulation according to the optimized package layout file to obtain an optimized eye diagram result.

[0181] For the specific implementation manner in the device embodiment, the details may refer to the relevant description in the method embodiment.

[0182] The device 10 for optimizing the impedance of a packaged transmission line has the same advantages as those of the related art and the method for optimizing the impedance of a packaged transmission line of the aforementioned embodiment, which will not be described in detail here.

[0183] See also Fig. 9 The embodiment of the present application also provides an electronic device 20, including: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus; the memory is used to store executable instructions, and the executable instructions enable the processor to execute the method for optimizing the package transmission line impedance as described in the above embodiment.

[0184] The electronic device 20 has the same advantages as those of the related art and the method for optimizing the impedance of the packaged transmission line of the aforementioned embodiment, which will not be described in detail here.

[0185] An embodiment of the present application further provides a storage medium. When instructions in the storage medium are executed by a processor of an electronic device, the processor is enabled to execute the method for optimizing the impedance of a packaged transmission line as described in the aforementioned embodiment.

[0186] The storage medium has the same advantages as those of the related art and the method for optimizing the impedance of the packaged transmission line of the aforementioned embodiment, which will not be described in detail here.

[0187] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0188] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, devices, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0189] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0190] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing terminal device to operate in a predictable manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0191] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0192] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

[0193] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0194] The above is a detailed introduction to a method, device, electronic device and storage medium for optimizing the impedance of a packaged transmission line provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for optimizing package transmission line impedance, characterized in that: The method comprises: Obtain the characteristic impedance values ​​of multiple transmission lines in the signal link; Determine a target transmission line from the multiple transmission lines according to the characteristic impedance value; wherein the impedance of the target transmission line is not matched with the transmission line adjacent to the multiple transmission lines in the signal transmission direction; the signal transmission direction is the transmission direction of the signal in the signal link; A target impedance value is determined according to a characteristic impedance value of the first transmission line and a characteristic impedance value of the second transmission line, and the target impedance value is used as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

2. The method for optimizing package transmission line impedance according to claim 1, characterized in that: The method further comprises: Obtaining an input voltage of the signal link; According to the input voltage and the characteristic impedance values ​​of each of the multiple transmission lines, a transmission equation of the signal link is obtained; wherein the transmission equation represents the relationship between the output voltage of the signal link and the input voltage; the transmission equation includes the characteristic impedance to be optimized of the target transmission line, the characteristic impedance value of the first transmission line, and the characteristic impedance value of the second transmission line; The step of determining the target impedance value according to the characteristic impedance value of the first transmission line and the characteristic impedance value of the second transmission line includes: The characteristic impedance of the target transmission line is optimized according to the transmission equation to obtain the target impedance value.

3. The method for optimizing package transmission line impedance according to claim 1, characterized in that: The step of determining the target impedance value according to the characteristic impedance value of the first transmission line and the characteristic impedance value of the second transmission line includes: Determining the target impedance value according to a first formula, a characteristic impedance value of the first transmission line, and a characteristic impedance value of the second transmission line; The first formula is: Among them, Z target represents the target impedance value, Z target-1 represents the characteristic impedance value of the first transmission line, Z target+1 represents the characteristic impedance value of the second transmission line.

4. The method for optimizing package transmission line impedance according to any one of claims 1 to 3, characterized in that: The step of determining a target transmission line from the plurality of transmission lines according to the characteristic impedance value comprises: Determining, according to the characteristic impedance value, a transmission line having abnormal characteristic impedance among the multiple transmission lines as an abnormal transmission line; A transmission line adjacent to the abnormal signal line in the signal transmission direction is determined as the target transmission line.

5. The method for optimizing package transmission line impedance according to claim 4, characterized in that: The step of determining a transmission line adjacent to the abnormal signal line in the signal transmission direction as the target transmission line comprises: Determine a transmission line adjacent to the abnormal transmission line and located before the abnormal transmission line in the signal transmission direction as the target transmission line; And / or, a transmission line adjacent to the abnormal transmission line and located after the abnormal transmission line in the signal transmission direction is determined as the target transmission line.

6. The method for optimizing package transmission line impedance according to any one of claims 1 to 3, characterized in that: The obtaining of characteristic impedance values ​​of the plurality of transmission lines in the signal link includes: Obtaining a package layout file of the plurality of transmission lines; The characteristic impedance values ​​of the plurality of transmission lines are determined according to the package layout file.

7. The method for optimizing package transmission line impedance according to any one of claims 1 to 3, characterized in that: The method further comprises: Generate an optimized package layout file according to the target impedance value; Eye diagram simulation is performed according to the optimized package layout file to obtain an optimized eye diagram result.

8. A device for optimizing the impedance of a package transmission line, characterized in that: The device comprises: A first acquisition module is used to acquire characteristic impedance values ​​of each of multiple transmission lines in a signal link; A determination module, configured to determine a target transmission line from the plurality of transmission lines according to the characteristic impedance value; wherein the impedance of the target transmission line is not matched with an impedance of a transmission line adjacent to the plurality of transmission lines in a signal transmission direction; the signal transmission direction is a transmission direction of the signal in the signal link; An optimization module is used to determine a target impedance value according to a characteristic impedance value of a first transmission line and a characteristic impedance value of a second transmission line, and use the target impedance value as the optimized characteristic impedance value of the target transmission line; wherein the first transmission line is a section of the transmission line adjacent to the target transmission line and located before the target transmission line in the signal transmission direction; and the second transmission line is a section of the transmission line adjacent to the target transmission line and located after the target transmission line in the signal transmission direction.

9. An electronic device, characterized in that: include: A processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other via the communication bus; The memory is used to store executable instructions, and the executable instructions enable the processor to execute the method for optimizing the impedance of a packaged transmission line according to any one of claims 1 to 7.

10. A storage medium, characterized in that: When the instructions in the storage medium are executed by a processor of an electronic device, the processor is enabled to execute the method for optimizing the impedance of a packaged transmission line as claimed in any one of claims 1 to 7.

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