A method and system for confirming PCB wiring voltage drop

Abstract

The present invention discloses a method and system for confirming the voltage drop of PCB wiring, which relates to the field of PCB design, including: designing a calculation module; searching for all routings included in a power line; obtaining the copper foil thickness of the layer where each routing is located; obtaining the width and length of each routing; obtaining the current of the power line; inputting the current, the width and length of the routing and the corresponding copper foil thickness into the calculation module; calculating the power voltage drop of each routing according to the current, the width and length of the routing and the corresponding copper foil thickness; adding the power voltage drops of all routings to obtain the power voltage drop of the power line; confirming whether the power voltage drop of the power line meets the requirements according to the design requirements of the circuit board. The present invention designs a calculation module, which can quickly and accurately confirm the power voltage drop of PCB wiring by using the calculation module, helping layout engineers to ensure that the power voltage drop is within the allowable range at the beginning of the design, and avoiding the risk of excessive power voltage drop in advance.

Description

Technical Field

[0001] The present invention relates to the field of PCB design, and in particular to a method and system for confirming a PCB wiring voltage drop. Background Art

[0002] In electronic circuit design, PCB wiring is a very important part. The rationality of wiring directly affects the performance and stability of the circuit. In the process of power wiring, factors such as the power voltage drop and current density of the circuit need to be considered. Among them, the power voltage drop is a very important indicator, which directly affects the stability and reliability of the circuit. Therefore, it is very necessary to confirm the power voltage drop of PCB wiring.

[0003] At present, simulation software is usually used to simulate and calculate the power supply voltage drop of PCB wiring. However, this method consumes a lot of time and computing resources. In addition, for some low-current power supplies, layout engineers will confirm the routing line width according to the schematic prompts, ignoring the influence of the DC resistance of the routing length itself. Under time constraints, simulation engineers are unable to simulate the DC voltage drop of the entire PCB, thus ignoring some low-current power supplies. If the routing of such a low-current power supply is too long or the routing width is too thin, it will cause excessive voltage drop, which will cause the circuit to not work properly or malfunction. Summary of the invention

[0004] The present invention provides a method and system for confirming a PCB wiring voltage drop, so as to overcome at least one technical problem existing in the prior art.

[0005] On the one hand, an embodiment of the present invention provides a method for confirming a PCB wiring voltage drop, comprising:

[0006] Design calculation modules;

[0007] Find all traces included in the power cable;

[0008] Get the copper foil thickness of each trace layer;

[0009] Get the width and length of each trace;

[0010] obtaining a current of the power line;

[0011] Inputting the current, the width and length of the trace and the corresponding copper foil thickness into the calculation module;

[0012] Calculate the power supply voltage drop of each routing line according to the current, the width and length of the routing line and the corresponding copper foil thickness;

[0013] Adding the power supply voltage drops of all the wirings to obtain the power supply voltage drop of the power line;

[0014] According to the design requirements of the circuit board, confirm whether the power voltage drop of the power line meets the requirements.

[0015] Optionally, the power supply voltage drop of each routing line is calculated according to the current, the width and length of the routing line and the corresponding copper foil thickness, specifically:

[0016] Power supply voltage drop v = current * (copper foil thickness * trace width * trace length) * resistivity of copper foil.

[0017] Optionally, when the power voltage drop of the power line does not meet the requirement, the method further includes:

[0018] Modify PCB wiring.

[0019] Optionally, the modifying of the PCB routing includes: modifying the width of the routing.

[0020] Optionally, the modifying of PCB wiring includes: modifying the thickness of the copper foil.

[0021] Optionally, the design requirements of the circuit board are specifically:

[0022] The power voltage drop of the power line is less than or equal to 3%.

[0023] Optionally, a calculation module is designed, specifically:

[0024] Use Python language to design computing modules.

[0025] Optionally, the calculation module includes a copper foil thickness input box, a trace width input box, a trace length input box, and a current input box; the current, the trace width, the trace length, and the corresponding copper foil thickness are input into the calculation module, specifically:

[0026] Input the copper foil thickness into the copper foil thickness input box;

[0027] Input the width of the trace into the trace width input box;

[0028] Input the length of the routing into the routing length input box;

[0029] The current is input into the current input box.

[0030] Optionally, the calculation module includes a voltage drop display box and a start calculation button;

[0031] The power supply voltage drop of each line is calculated using the calculation module, specifically:

[0032] Click the Start Calculation button, and the calculation module calculates the power supply voltage drop of each line, and the power supply voltage drop is displayed in the voltage drop display box.

[0033] On the other hand, the present invention also provides a system for confirming a PCB wiring voltage drop, comprising:

[0034] Design module, used for designing calculation modules;

[0035] A search module is used to find all the traces included in the power line;

[0036] The first acquisition module is used to obtain the copper foil thickness of each routing layer;

[0037] The second acquisition module is used to obtain the width and length of each trace;

[0038] A third acquisition module, used to acquire the current of the power line;

[0039] An input module, used to input the current, the width and length of the trace and the corresponding copper foil thickness into the calculation module;

[0040] A calculation module, used for calculating the power supply voltage drop of each routing line according to the current, the width and length of the routing line and the corresponding copper foil thickness;

[0041] A summing module, used for adding the power supply voltage drops of all the wirings to obtain the power supply voltage drop of the power line;

[0042] The confirmation module is used to confirm whether the power voltage drop of the power line meets the requirements according to the design requirements of the circuit board.

[0043] The innovative features of the embodiments of the present invention include:

[0044] 1. In this embodiment, a calculation module is designed to quickly and accurately confirm the power supply voltage drop of PCB wiring, thereby helping layout engineers to ensure that the power supply voltage drop is within the allowable range at the beginning of the design and avoid the risk of excessive power supply voltage drop in advance. This is one of the innovations of the embodiment of the present invention.

[0045] 2. In this embodiment, the difficulty of calculating the power line voltage drop is reduced without reducing the accuracy, so that the power supply voltage drop can be calculated more simply and quickly, which can greatly improve the efficiency and reliability of circuit design, help layout engineers avoid the problem of excessive power supply voltage drop in advance at the beginning of the design, and avoid the problem of insufficient space and optimization difficulties during subsequent modification and optimization, saving time and manpower, and reducing the risk of revision, which is one of the innovations of the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 A flow chart of a method for confirming PCB wiring voltage drop provided by an embodiment of the present invention;

[0048] Figure 2 A schematic diagram of a computing module provided in an embodiment of the present invention;

[0049] Figure 3 Another flow chart of the method for confirming PCB wiring voltage drop provided by an embodiment of the present invention;

[0050] Figure 4 A schematic diagram of a structure of a system for confirming a PCB wiring voltage drop provided by an embodiment of the present invention;

[0051] Figure 5 Another structural schematic diagram of a system for confirming PCB wiring voltage drop provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0054] The embodiment of the present invention discloses a method and system for confirming a PCB wiring voltage drop, which are described in detail below.

[0055] Figure 1 A flow chart of a method for confirming PCB wiring voltage drop provided by an embodiment of the present invention, Figure 2 A schematic diagram of a computing module provided in an embodiment of the present invention, please refer to Figure 1 and Figure 2 The method for confirming the voltage drop of PCB wiring provided by the embodiment of the present invention includes:

[0056] Step 1: Design the calculation module;

[0057] Step 2: Find all the traces included in the power line;

[0058] Step 3: Get the copper foil thickness of each trace layer;

[0059] Step 4: Get the width and length of each trace;

[0060] Step 5: Get the current of the power line;

[0061] Step 6: Input the current, trace width, length and corresponding copper foil thickness into the calculation module;

[0062] Step 7: Calculate the power voltage drop of each trace based on the current, trace width, length and corresponding copper foil thickness;

[0063] Step 8: Add the power voltage drop of all traces to get the power voltage drop of the power line;

[0064] Step 9: According to the design requirements of the circuit board, confirm whether the power voltage drop of the power line meets the requirements.

[0065] Specifically, please refer to Figure 1 The method for confirming the voltage drop of PCB wiring provided by the embodiment of the present invention first designs a calculation module through step 1, and the voltage drop of the power line can be conveniently and quickly calculated and evaluated through the calculation module. The calculation module here can be designed and packaged into a small program using Python language, such as Figure 2 As shown, it includes multiple input boxes and output boxes. By inputting input parameters into corresponding input boxes respectively, the voltage drop of the power line can be calculated, which is conducive to reducing workload and saving resources.

[0066] Due to PCB space limitations, PCB routing may involve layer change and drilling, and problems such as inconsistent copper foil thickness, line width and line length of different routing layers may occur. Therefore, the present invention finds out all the routings included in the power line through step 2, so as to subsequently calculate the voltage drop of all the routings included in the power line.

[0067] After finding all the power traces, in step 3, get the copper foil thickness of each trace layer. In step 4, get the width and length of each trace. In step 5, get the current of the power line. It should be noted that the copper foil thickness, trace width and length, and power line current are all values ​​set by the designer according to specific needs during the PCB design process.

[0068] After obtaining the specific values ​​of the voltage drop parameters that may affect the power line, in step 6, the current, the width and length of the line and the corresponding copper foil thickness are respectively input into the calculation module. Since the calculation module integrates the voltage drop calculation formula, in step 7, the calculation module can calculate the power voltage drop of each line according to the current, the width and length of the line and the corresponding copper foil thickness.

[0069] After obtaining the power voltage drop of each routing line, in step 8, the power voltage drops of all routing lines are added together to obtain the power voltage drop of the entire power line. Then in step 9, according to the design requirements of the circuit board, it is determined whether the power voltage drop of the power line meets the requirements. Here, the design requirements of the circuit board can specifically be the requirements of the chip for the power supply. For example, the voltage drop of the VCC1.0 power network cannot exceed 3% at 10A. That is to say, when the voltage drop exceeds 3%, it means that the power voltage drop does not meet the requirements.

[0070] The method for confirming the voltage drop of PCB wiring provided by the present invention can quickly and accurately confirm the power voltage drop of PCB wiring by designing a calculation module. Compared with the traditional simulation calculation method, the difficulty of calculating the voltage drop of the power line is reduced without reducing the accuracy, so that the power voltage drop can be calculated more simply and quickly, which can greatly improve the efficiency and reliability of circuit design, help layout engineers avoid the problem of excessive power voltage drop in advance at the beginning of design, ensure that the power voltage drop is within the allowable range, avoid the problem of insufficient space and optimization difficulty in subsequent modification and optimization, save time and manpower, and reduce the risk of revision.

[0071] Optionally, refer to Figure 1 In step 7, the power supply voltage drop of each trace is calculated according to the current, the width and length of the trace and the corresponding copper foil thickness. Specifically, the power supply voltage drop v = current * (copper foil thickness * trace width * trace length) * copper foil resistivity.

[0072] Specifically, please refer to Figure 1 and Figure 2 , the present invention uses Python language to express the calculation formula and encapsulates it into a small program. This embodiment uses the formula, power supply voltage drop v = current * (copper foil thickness * trace width * trace length) * copper foil resistivity to calculate the voltage drop of each trace. Among them, the resistivity of copper foil is related to the material properties of copper, through Figure 2 As shown in the schematic block diagram of the calculation module, enter the above parameters into the corresponding input box and click the start calculation button to calculate the power supply voltage drop.

[0073] Optionally, Figure 3For another flow chart of the method for confirming PCB wiring voltage drop provided by the embodiment of the present invention, please refer to Figure 3 , when the power voltage drop of the power line does not meet the requirement, it also includes: step 10, modifying the PCB wiring.

[0074] Specifically, please refer to Figure 3 , when the power voltage drop of the power line does not meet the requirements, for example, for the VCC1.0 power network, its voltage drop cannot exceed 3% at 10A. When the voltage drop exceeds 3%, it means that the power voltage drop does not meet the requirements. At this time, in order to make the PCB meet the design requirements, it needs to be modified so that the power voltage drop meets the design requirements. Therefore, when the power voltage drop of the power line does not meet the requirements, this embodiment modifies the PCB wiring through step 10. After the modification is completed, jump to step 2 and calculate the voltage drop of all the lines again until the voltage drop of the power line meets the requirements.

[0075] Optionally, refer to Figure 3 In step 10, modifying the PCB wiring includes: modifying the width of the wiring. Preferably, modifying the PCB wiring includes: modifying the thickness of the copper foil.

[0076] Specifically, both the trace length and trace width will affect the trace voltage drop. Therefore, in this embodiment, the PCB wiring is modified by modifying the trace width to change the trace voltage drop, thereby avoiding the problem that the small current power supply has too large a voltage drop due to the trace width being too thin, thereby causing the circuit to not work properly or malfunction.

[0077] In addition to modifying the trace width, the voltage drop can also be changed by modifying the trace length. This solves the problem that in the existing voltage drop simulation process, for some small current power supplies, the circuit cannot work properly or malfunctions because the layout engineer ignores the influence of the DC resistance of the trace length itself.

[0078] It should be noted that, in addition to modifying the width or length of the routing line separately, the width or length of the routing line can also be modified simultaneously to change the voltage drop on the routing line. Which method is used can be set according to actual conditions and is not specifically limited here.

[0079] Optionally, refer to Figure 1 In step 9, the design requirements of the circuit board are specifically: the power supply voltage drop of the power line is less than or equal to 3%.

[0080] Specifically, the design requirements of the circuit board can be specifically the requirements of the chip for the power supply. In this embodiment, the power supply voltage drop of the power line is set to be less than or equal to 3%. For example, the voltage drop of the VCC1.0 power supply network cannot exceed 3% at 10A, that is, when the voltage drop exceeds 3%, it means that the power supply voltage drop does not meet the requirements.

[0081] Optionally, refer to Figure 2 The calculation module includes a copper foil thickness input box, a trace width input box, a trace length input box, and a current input box; the current, trace width, length, and corresponding copper foil thickness are input into the calculation module, specifically: the copper foil thickness is input into the copper foil thickness input box; the trace width is input into the trace width input box; the trace length is input into the trace length input box; the current is input into the current input box.

[0082] Specifically, please refer to Figure 2 , the present invention expresses the voltage drop calculation formula in Python language, and uses UI to encapsulate it into a small program as a calculation module. When encapsulating, a copper foil thickness input box, a trace width input box, a trace length input box, and a current input box are set. In this way, when inputting parameters, the copper foil thickness is input into the copper foil thickness input box, the trace width is input into the trace width input box, the trace length is input into the trace length input box, and the trace current is input into the current input box. This design can not only intuitively display each input parameter, but also when the voltage drop does not meet the requirements and the PCB wiring needs to be modified, resulting in the need to re-enter the parameters, it can be directly modified through each input box without modifying the program design, and the voltage drop after the wiring is modified can be recalculated.

[0083] Optionally, refer to Figure 2 The calculation module includes a voltage drop display box and a start calculation button; the calculation module is used to calculate the power voltage drop of each routing line, specifically: click the start calculation button, the calculation module calculates the power voltage drop of each routing line, and the power voltage drop is displayed in the voltage drop display box.

[0084] Specifically, please refer to Figure 2 In this embodiment, the calculation module also includes a voltage drop display box and a start calculation button. After all parameters are input into the calculation module, click the start calculation button to calculate the power voltage drop of the corresponding routing, and the power voltage drop is displayed in the voltage drop display box. In this way, each time the voltage drop is calculated, it can be displayed intuitively through the voltage drop display box.

[0085] Based on the same inventive concept, the present invention also provides a system for confirming the voltage drop of PCB wiring. Figure 4 A schematic diagram of a structure of a system for confirming PCB wiring voltage drop provided by an embodiment of the present invention is provided in FIG. Figure 4 The system 100 for confirming the voltage drop of a PCB wiring provided by an embodiment of the present invention includes:

[0086] Design module 101, used for designing calculation module 107;

[0087] A search module 102 is used to search for all the wirings included in the power line;

[0088] The first acquisition module 103 is used to obtain the copper foil thickness of each routing layer;

[0089] A second acquisition module 104 is used to acquire the width and length of each routing line;

[0090] A third acquisition module 105, used to acquire the current of the power line;

[0091] An input module 106 is used to input the current, the width and length of the trace and the corresponding copper foil thickness into a calculation module 107;

[0092] A calculation module 107, used to calculate the power supply voltage drop of each routing line according to the current, the width and length of the routing line and the corresponding copper foil thickness;

[0093] A summing module 108 is used to add the power voltage drops of all the wires to obtain the power voltage drop of the power line;

[0094] The confirmation module 109 is used to confirm whether the power voltage drop of the power line meets the requirements according to the design requirements of the circuit board.

[0095] Specifically, please refer to Figure 4 The system for confirming the voltage drop of PCB wiring provided by the embodiment of the present invention first designs a calculation module 107 through the design module 101, and the voltage drop of the power line can be conveniently and quickly calculated and evaluated through the calculation module 107. The calculation module 107 here can be designed and packaged into a small program using Python language, such as Figure 2 As shown, it includes multiple input boxes and output boxes. By inputting input parameters into corresponding input boxes respectively, the voltage drop of the power line can be calculated, which is conducive to reducing workload and saving resources.

[0096] Due to PCB space limitations, PCB routing may involve layer change and drilling, and may cause problems such as inconsistent copper foil thickness, line width and line length of different routing layers. Therefore, the present invention uses the search module 102 to find all the routings included in the power line, so as to subsequently calculate the voltage drop of all the routings included in the power line.

[0097] After all power lines are found, the copper foil thickness of the layer where each line is located is obtained through the first acquisition module 103. The width and length of each line are obtained through the second acquisition module 104. The current of the power line is obtained through the third acquisition module 105. It should be noted that the copper foil thickness, the width and length of the line, and the current of the power line are all values ​​set by the designer according to specific needs during the PCB design process.

[0098] After obtaining the specific values ​​of the voltage drop parameters that may affect the power line, the current, the width and length of the line and the corresponding copper foil thickness are respectively input into the calculation module 107 using the input module 106. Since the calculation module 107 is integrated with the voltage drop calculation formula, after the design module 101 designs the calculation module 107, the calculation module 107 can calculate the power voltage drop of each line according to the current, the width and length of the line and the corresponding copper foil thickness.

[0099] After obtaining the power voltage drop of each line, the power voltage drop of all lines is added up by using the summing module 108, and the power voltage drop of the entire power line is obtained. Then the confirmation module 109 determines whether the power voltage drop of the power line meets the requirements according to the design requirements of the circuit board. Here, the design requirements of the circuit board can specifically be the requirements of the chip for the power supply. For example, the voltage drop of the VCC1.0 power network cannot exceed 3% at 10A. That is to say, when the voltage drop exceeds 3%, it means that the power voltage drop does not meet the requirements.

[0100] The system for confirming the voltage drop of PCB wiring provided by the present invention designs a calculation module 107, and the calculation module 107 can be used to quickly and accurately confirm the power supply voltage drop of PCB wiring. Compared with the traditional simulation calculation method, the difficulty of calculating the voltage drop of the power line is reduced without reducing the accuracy, so that the power supply voltage drop can be calculated more simply and quickly, which can greatly improve the efficiency and reliability of circuit design, help layout engineers avoid the problem of excessive power supply voltage drop in advance at the beginning of design, ensure that the power supply voltage drop is within the allowable range, avoid the problem of insufficient space and optimization difficulty in subsequent modification and optimization, save time and manpower, and reduce the risk of revision.

[0101] Optionally, Figure 5 Another structural diagram of the system for confirming PCB wiring voltage drop provided by the embodiment of the present invention is shown in FIG. Figure 5 When the power voltage drop of the power line does not meet the requirement, it also includes: a modification module 110.

[0102] Specifically, please refer to Figure 5 , when the power voltage drop of the power line does not meet the requirements, for example, for the VCC1.0 power network, its voltage drop cannot exceed 3% at 10A. When the voltage drop exceeds 3%, it means that the power voltage drop does not meet the requirements. At this time, in order to make the PCB meet the design requirements, it needs to be modified so that the power voltage drop meets the design requirements. Therefore, when the power voltage drop of the power line does not meet the requirements, this embodiment modifies the PCB wiring through the modification module 110. After the modification is completed, the voltage drop of all the routings is calculated again until the voltage drop of the power line meets the requirements.

[0103] Since both the trace length and trace width will affect the trace voltage drop, in this embodiment, the PCB wiring is modified by modifying the trace width to change the trace voltage drop, thereby avoiding the problem of excessive voltage drop of a small current power supply due to excessive trace width, which may cause the circuit to not work properly or malfunction.

[0104] In addition to modifying the trace width, the voltage drop can also be changed by modifying the trace length. This solves the problem that in the existing voltage drop simulation process, for some small current power supplies, the circuit cannot work properly or malfunctions because the layout engineer ignores the influence of the DC resistance of the trace length itself.

[0105] It should be noted that, in addition to modifying the width or length of the routing line separately, the width or length of the routing line can also be modified simultaneously to change the voltage drop on the routing line. Which method is used can be set according to actual conditions and is not specifically limited here.

[0106] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0107] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for confirming PCB wiring voltage drop, characterized in that: include: Design calculation modules; Find all traces included in the power cable; Get the copper foil thickness of each trace layer; Get the width and length of each trace; obtaining a current of the power line; Inputting the current, the width and length of the trace and the corresponding copper foil thickness into the calculation module; Calculate the power supply voltage drop of each routing line according to the current, the width and length of the routing line and the corresponding copper foil thickness; Adding the power supply voltage drops of all the wirings to obtain the power supply voltage drop of the power line; According to the design requirements of the circuit board, confirm whether the power voltage drop of the power line meets the requirements.

2. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: According to the current, the width and length of the trace and the corresponding copper foil thickness, the power supply voltage drop of each trace is calculated, specifically: Power supply voltage drop v = current * (copper foil thickness * trace width * trace length) * resistivity of copper foil.

3. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: When the power voltage drop of the power line does not meet the requirement, the method further includes: Modify PCB wiring.

4. The method for confirming PCB wiring voltage drop according to claim 3, characterized in that: The modifying of the PCB wiring includes: modifying the width of the routing.

5. The method for confirming PCB wiring voltage drop according to claim 3, characterized in that: The modifying of PCB wiring includes: modifying the thickness of the copper foil.

6. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: The design requirements of the circuit board are as follows: The power voltage drop of the power line is less than or equal to 3%.

7. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: Design the calculation module, specifically: Use Python language to design computing modules.

8. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: The calculation module includes a copper foil thickness input box, a trace width input box, a trace length input box, and a current input box; the current, the trace width, the trace length, and the corresponding copper foil thickness are input into the calculation module, specifically: Input the copper foil thickness into the copper foil thickness input box; Input the width of the trace into the trace width input box; Input the length of the routing into the routing length input box; The current is input into the current input box.

9. The method for confirming PCB wiring voltage drop according to claim 1, characterized in that: The calculation module includes a voltage drop display frame and a start calculation button; The power supply voltage drop of each line is calculated using the calculation module, specifically: Click the Start Calculation button, and the calculation module calculates the power supply voltage drop of each line, and the power supply voltage drop is displayed in the voltage drop display box.

10. A system for confirming PCB wiring voltage drop, characterized in that: include: Design module, used for designing calculation modules; A search module is used to find all the traces included in the power line; The first acquisition module is used to obtain the copper foil thickness of each routing layer; The second acquisition module is used to obtain the width and length of each trace; A third acquisition module, used to acquire the current of the power line; An input module, used to input the current, the width and length of the trace and the corresponding copper foil thickness into the calculation module; A calculation module, used for calculating the power supply voltage drop of each routing line according to the current, the width and length of the routing line and the corresponding copper foil thickness; A summing module, used for adding the power supply voltage drops of all the wirings to obtain the power supply voltage drop of the power line; The confirmation module is used to confirm whether the power voltage drop of the power line meets the requirements according to the design requirements of the circuit board.

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