JPH1097551A - Transmission line analysis waveform distortion counter measure processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten work time and to select an optimum signal waveform distortion counter measure by generating a waveform distortion counter measure processing circuit description file obtained by taking a waveform distortion counter measure in a counter measure library against a circuit description file, automatically selecting the appropriate waveform distortion counter measure and instructing the execution of analysis. SOLUTION: A waveform judgement part 12 inputs restricted value data 11 and analysis waveform data 8, which are inputted from a restricted value input part 10, judges whether or not the level of signal waveform distortion from analysis waveform data 8 is within a defining value data 11 and judges the necessity of the waveform distortion counter measure. A waveform distortion counter measure result data holding part 13 holds a judged result as waveform distortion counter measure result data and a judgement result display part 14 displays the judged result. A waveform distortion counter measure execution part 16 generates the waveform distortion counter measure processing circuit description file 17 where the waveform distortion counter measure in the counter measure library 15 is executed on the circuit description file 5 when the waveform distortion counter measure is required, automatically selects the appropriate waveform distortion counter measure and instructs analysis execution to a transmission line analysis part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission line analysis waveform distortion which eliminates a erroneous decision at the time of a signal waveform distortion countermeasure by a human system, and enables an optimum signal waveform distortion countermeasure to be selected while shortening a working time. The present invention relates to a countermeasure processing device and a transmission line analysis system including the same.

[0002]

2. Description of the Related Art In general, for example, before manufacturing a printed board, a transmission line analysis is performed for the purpose of confirming signal waveform quality. As a device for this purpose, a transmission line analysis device that analyzes signal waveform distortion due to reflection and crosstalk of an electronic circuit and predicts whether or not to operate normally has been widely used.

In this type of transmission line analyzer, the work of determining the necessity of measures against waveform distortion from the level of distortion of the analyzed waveform data obtained by analyzing the signal waveform distortion depends on the experience and intuition of engineers. We make decisions based on our judgment.

[0004] For this reason, sometimes a backward operation is performed due to a determination error. If it is determined that countermeasures against waveform distortion are necessary, select a method deemed appropriate from various types of countermeasures for waveform distortion, and manually create a circuit description file with countermeasures against waveform distortion. I have.

However, in such a method, it is not always possible to take an optimal countermeasure for waveform distortion.
In addition, there is a problem that human error is likely to occur and work time is required. As a result, in the transmission line analyzer,
An analysis error occurs or analysis takes a long time.

[0006]

As described above, in the conventional method for preventing waveform distortion, it is not possible to take an optimal countermeasure for the waveform distortion, and it is easy for human error to occur and it takes a long time to work. was there.

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate an erroneous decision at the time of signal waveform distortion countermeasures by a human system and to select an optimal signal waveform distortion countermeasure while shortening work time. An object of the present invention is to provide a processing device.

[0008]

In order to achieve the above object, a transmission line analysis waveform distortion countermeasure processing apparatus according to the first aspect of the present invention removes signal waveform distortion due to reflection and crosstalk of an electronic circuit. A specified value input means for generating and inputting a specified value relating to signal waveform quality with respect to analysis waveform data obtained by analysis, and a specified value and analysis waveform data input by the specified value input means, and the analysis waveform A waveform determining means for determining the necessity of waveform distortion countermeasures by determining whether or not the level of signal waveform distortion is within a specified value from data; a countermeasure library in which the countermeasures against waveform distortion are collectively described; If the determination means determines that a measure against waveform distortion is necessary, a circuit distortion countermeasure processing circuit description file in which countermeasures against waveform distortion in the countermeasure library are applied to the circuit description file is generated. Comprising a waveform distortion measures implemented means for instructing execution of automatic selection analyzes the appropriate waveform distortion measures by.

Therefore, in the transmission line analysis waveform distortion countermeasure processing apparatus according to the first aspect of the present invention, the analysis waveform data obtained by analyzing the signal waveform distortion of the electronic circuit is provided.
By inputting the specified value for signal waveform distortion, automatic waveform judgment is performed based on the analyzed waveform data to determine whether the signal waveform distortion is within the specified value.As a result of the determination, the signal waveform distortion must be within the specified value. For example, by automatically generating a waveform distortion countermeasure processing circuit description file in the countermeasure library that has been subjected to waveform distortion countermeasures, and sequentially analyzing the transmission line circuit description file, the signal waveform distortion in the countermeasure library can be analyzed. Therefore, it is possible to select an optimal countermeasure for the waveform distortion that reduces the most.

Further, the above-described waveform determination is made strictly based on the input specified value, thereby preventing the occurrence of a human-based determination error. Further, by automatically generating a waveform distortion countermeasure processing circuit description file in which a waveform distortion countermeasure has been taken, it is possible to reduce work time.

Further, the transmission line analysis waveform distortion countermeasure processing apparatus according to the invention according to claim 2 includes:
By inputting the specified value for waveform distortion, it is automatically determined whether the rising and falling delay time of the waveform, the voltage value of undershoot and overshoot, and the threshold voltage value satisfy the specified value. Is not satisfied, it is determined that a measure against waveform distortion is necessary.

Accordingly, in the transmission line analysis waveform distortion countermeasure processing apparatus according to the second aspect of the present invention, the rise, fall delay time, undershoot and overshoot voltage values, and threshold voltage values are specified. By determining the waveform based on the value, it is possible to more strictly select an optimal countermeasure against waveform distortion.

In the transmission line analysis waveform distortion countermeasure processing apparatus according to the third aspect of the present invention, the waveform determining means determines whether there is a rising or falling stage of the signal waveform. If there is a stage, it is automatically determined whether or not the stage is at an appropriate level. If the stage is not at an appropriate level, it is determined that a measure against waveform distortion is necessary.

Therefore, in the transmission line analysis waveform distortion countermeasure processing apparatus according to the third aspect of the present invention, the waveform is determined based on whether or not there is a rising or falling stage of the signal waveform. It is possible to detect a waveform distortion that may cause a malfunction due to a step in the waveform.

Further, the transmission line analysis waveform distortion countermeasure processing device according to the invention according to claim 4 calculates, as the waveform distortion countermeasure means, an impedance of a signal line to be countermeasured, and performs the countermeasure against the waveform distortion countermeasure. Impedance matching is automatically processed, a connection number is automatically added so that it can be incorporated into the circuit description file, and a waveform distortion countermeasure processing circuit description file is automatically generated.

Therefore, in the transmission line analysis waveform distortion countermeasure processing apparatus according to the fourth aspect of the present invention, impedance matching of a signal line to be countermeasured against the waveform distortion countermeasure is processed and can be incorporated into a circuit description file. By generating a waveform distortion countermeasure processing circuit description file by adding a connection number, it is possible to select a waveform distortion countermeasure having the highest noise reduction effect. As described above, it is possible to eliminate an erroneous determination at the time of a signal waveform distortion countermeasure by a human system, and to select an optimal signal waveform distortion countermeasure while shortening a working time.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention extracts an analysis waveform data from a transmission line analyzing apparatus for analyzing a signal waveform distortion due to reflection and crosstalk of an electronic circuit, and inputs a specified value relating to the signal waveform distortion. Automatically determines whether the signal waveform distortion is within the specified value from the analyzed waveform data and if the signal waveform distortion is not within the specified value as a result of the determination, measures the waveform distortion in the countermeasure library in the circuit description file. To automatically generate a waveform distortion countermeasure processing circuit description file so that a countermeasure against waveform distortion that minimizes signal waveform distortion can be selected.

Hereinafter, an embodiment of the present invention based on the above concept will be described in detail with reference to the drawings. (One Embodiment) FIG. 1 is a functional block diagram showing an example of the overall configuration of a transmission line analysis system including a transmission line analysis waveform distortion countermeasure processing apparatus according to the present embodiment.

In FIG. 1, a transmission line analysis device 1 basically includes a circuit description generation unit 4, a transmission line analysis unit 6,
An analysis result display unit 7 is provided. Here, the circuit description generation unit 4 takes in the layout data 2 which is data at the time of layout design of the printed board and the element model data 3 which describes the electric characteristics of the elements in a predetermined format, and generates the circuit description file 5. Is what you do.

Further, the transmission line analysis unit 6 obtains analysis waveform data 8 by taking in the circuit description file 5 and analyzing signal waveform distortion due to reflection and crosstalk of the electronic circuit on the printed board.

Further, the analysis result display section 7 displays analysis waveform data 8 which is an analysis result by the transmission line analysis section 6. The analysis waveform data 8 is for outputting the analysis result by the transmission line analysis unit 9 as time-voltage coordinate data, and is input data to the transmission line analysis waveform distortion countermeasure processing device 9.

On the other hand, the transmission line analysis waveform distortion countermeasure processing unit 9
Is basically a specified value input unit 10 and a waveform determination unit 12
A waveform distortion countermeasure result data holding unit 13, a determination result display unit 14, a countermeasure library 15, and a waveform distortion countermeasure execution unit 1.
6.

Here, the specified value input section 10 is for generating and inputting specified value data 11 relating to the signal waveform quality with respect to the analysis waveform data 8 from the transmission line analysis device 1.

The waveform determining section 12 is provided with the specified value input section 1.
By inputting the specified value data 11 and the analysis waveform data 8 input as 0 and determining whether or not the level of the signal waveform distortion is within the specified value data 11 from the analysis waveform data 8, the waveform distortion is obtained. This is to determine the need for countermeasures.

In this embodiment, the waveform determining section 12
By inputting the specified value data 11 for the waveform distortion, it is automatically determined whether or not the rising and falling delay times of the waveform, the undershoot and overshoot voltage values, and the threshold voltage value satisfy the specified values. When the specified value is not satisfied, it is determined that a countermeasure for waveform distortion is necessary.

Further, the waveform distortion countermeasure result data holding unit 13
Holds the result determined by the waveform determining unit 12 as waveform distortion countermeasure result data. On the other hand, the determination result display unit 14 displays the result determined by the waveform determination unit 12.

The countermeasure library 15 collectively describes countermeasures against waveform distortion. Further, the waveform distortion countermeasure implementation unit 16 performs a waveform distortion countermeasure processing circuit that applies the waveform distortion countermeasure in the countermeasure library 15 to the circuit description file 5 when the waveform determination unit 12 determines that the waveform distortion countermeasure is necessary. By generating the description file 17, an appropriate measure against waveform distortion is automatically selected, and the transmission line analyzer 6 is instructed to execute the analysis.

In this embodiment, the waveform distortion countermeasure execution unit 16 calculates the impedance of the signal line to be countermeasured, automatically performs impedance matching for the waveform distortion countermeasure, and incorporates the impedance into the circuit description file 5. The connection number is automatically added as much as possible, and the waveform distortion countermeasure processing circuit description file 17 is automatically generated.

Next, the operation of the transmission line analysis system of the present embodiment configured as described above will be described with reference to FIG. In FIG. 1, in a transmission line analysis apparatus 1, layout data 2 which is data at the time of layout design of a printed circuit board, and element model data 3 in which electrical characteristics of elements are described in a predetermined format are converted into a circuit description generation unit 4 And a circuit description file 5 is generated based on these.

The circuit description file 5 is taken into the transmission line analysis unit 6, where signal waveform distortion due to reflection and crosstalk of the electronic circuit on the printed board is analyzed, and analysis waveform data 8, which is an analysis result, is analyzed. Displayed by the display unit 7.

The analysis waveform data 8 is supplied to the transmission line analysis waveform distortion countermeasure processing device 9 as its input data. On the other hand, in the transmission line analysis waveform distortion countermeasure processing device 9, as shown in FIG. 2, the specified value input unit 10 supplies the power supply voltage value n 1, the allowable value n 2 of the rise and fall delay time, and the maximum allowable overshoot A voltage value n3;
The maximum allowable undershoot voltage value n4, the HI-side threshold voltage value n5, the LOW-side threshold voltage value n6, and the voltage margin n7 from the HI and LOW-side threshold voltage values are input, and the specified value data is input. 11 is generated.

Next, the waveform determination section 12 fetches the analysis waveform data 8 and the specified value data 11 to determine the necessity of measures against waveform distortion, and the determination result display section 11 displays the determination result.

As a result, when it is determined that the waveform distortion countermeasures are necessary, the waveform distortion countermeasure execution unit 16 fetches the circuit description file 5 and simultaneously executes the countermeasure library 15 which is a library describing the waveform distortion countermeasures. Are sequentially selected and fetched, and a waveform distortion countermeasure processing circuit description file 17 in which a waveform distortion countermeasure is applied to the circuit description file 5 is generated.
The transmission line analyzing unit 6 is instructed to execute the analysis.

As a result, the result analyzed again by the transmission line analyzing unit 6 is compared with the specified value data 11 by the waveform judging unit 12, and at the same time, the result is held by the waveform distortion countermeasure result data holding unit 13. The countermeasure implementing unit 16 takes the next countermeasure of the countermeasure library 15, and when the repetition is completed, the waveform judgment unit 12 displays the held judgment results in a list on the judgment result display unit 14 to minimize the waveform distortion. Is selected.

Here, the internal processing in the waveform determination section 12 will be described in more detail with reference to the flowchart shown in FIG. First, in step q1, the analysis waveform data 8
The rise and fall times of the signal waveform are calculated from the time-voltage coordinate data table.

In this case, the rise time is calculated from the time when the voltage value reaches 10% of the power supply voltage value to the time when the voltage value reaches 90% of the power supply voltage value. .

The method of calculating the fall time is reversed. Next, in step q2, it is determined whether the rise and fall times calculated in step q1 are within the allowable value n2 of the rise and fall delay times of the specified value data 11.

As a result, if the value is not within the specified value, at step q8, a flag indicating that a measure against waveform distortion is required is set, and the process ends. If it is within the specified value, in step q3, the maximum and minimum values of the voltage value are extracted from the time-voltage coordinate data table of the analysis waveform data 8, and in step q4, undershoot (minimum value) and overshoot are detected. It is determined whether or not the voltage of the shoot (maximum value) is within allowable voltage values n3 and n4 of the overshoot and undershoot of specified value data 11.

As a result, if the value is not within the specified value, in step q8, a flag indicating that a measure against waveform distortion is required is set, and the process ends. If it is within the specified value, in step q5, the voltage value of the polarity (positive / negative) change point of the slope of the analysis waveform is extracted from the time-voltage coordinate data table of the analysis waveform data 8, and further in step q6. The voltage value of the changed point is higher than the HI-side threshold voltage value n5, the voltage value of the next change point after the peak is equal to or larger than the margin value, or the voltage value of the LOW-side threshold voltage value n6 is negative. It is determined whether the voltage value at the next transition point is equal to or less than the margin.

As a result, if this condition is satisfied on both the HI side and the LOW side, at step q7, a flag indicating that no countermeasures against waveform distortion is necessary is set, and if not, the process is terminated at step q8. A flag indicating that distortion countermeasures are required is set, and the process ends.

Next, regarding the above countermeasure library 15,
This will be described in more detail with reference to FIG. As shown in FIG.
In the case of the parallel termination processing shown in the waveform distortion countermeasure s1, the countermeasure library 15 uses the input signal element s3 and the signal in the transmission line circuit including the signal line s4 connecting the output signal element s2 and the input signal element s3. If the input signal element connection number s5 between the line s4 and # is #, # and gnd
A countermeasure in which a resistor (rterm1) s6 is connected to (0 V) is parallel termination processing.

This countermeasure is a circuit description as shown in a countermeasure library example s7. The input element connection number and the resistance value described in the countermeasure library example s7 are set to appropriate numbers and values by a waveform distortion countermeasure execution unit 16 described later.

Next, the internal processing in the waveform distortion countermeasure execution section 16 will be described in more detail with reference to the flowchart shown in FIG. First, in step p1, the circuit description file 5 is read, and in step p2, the impedance of the signal line between the elements for which the waveform distortion has been detected is calculated by a known calculation method for the read circuit description file 5. Is done.

Next, at step p3, the countermeasure library 15 is read, and at step p4, the resistance value portion of the above-described countermeasure library example s7 of FIG. 4 is replaced with the value calculated at step p2. You.

Next, in step p5, the connection number of the input / output terminal of the element where the waveform distortion is detected in the circuit description file 5 is extracted.
The connection number is replaced with the countermeasure against the waveform distortion that has been subjected to the impedance matching processing in 4.

Next, in step p7, the above-mentioned step p
In the circuit description file 5 read in step 1,
4 is incorporated into the circuit description file 5 to generate a waveform distortion countermeasure processing circuit description file 17, which is again transmitted to the transmission line analyzer 6 in step p8.
Is instructed to execute the analysis.

The above-described repetition is carried out for the number of waveform distortion countermeasures in the countermeasure library 15, and the waveform distortion countermeasure having the highest noise reduction effect can be selected by referring to the waveform distortion countermeasure result data holding unit 13.

As described above, in the transmission line analysis system including the transmission line analysis waveform distortion countermeasure processing device 9 of the present embodiment, the time-voltage data of the signal waveform analyzed by the transmission line analysis device 1 is extracted, and the power Voltage value, allowable value of rise and fall delay time, allowable voltage value of overshoot and allowable voltage value of undershoot, HI-side threshold voltage value, LOW-side threshold voltage value, and HI and LOW-side threshold By inputting a voltage margin from the voltage value by an engineer, it is automatically determined whether or not the level of the waveform distortion is within a specified value. Automatically generates a waveform distortion countermeasure processing circuit description file 17 which has been subjected to Since as will conduct analysis in order for, it is possible to select the optimum waveform distortion measures within measures library 15.

In addition, since the above-mentioned waveform determination is made strictly based on the input specified value, it is possible to prevent a human-based determination error, and to perform a waveform distortion countermeasure in which a waveform distortion countermeasure is taken. Since the processing circuit description file 17 is automatically generated, the working time can be reduced.

As described above, it is possible to eliminate an erroneous decision when taking measures against signal waveform distortion by a human system, and to select an optimal measure against signal waveform distortion while shortening the working time. (Other Embodiment 1) FIG. 6 is a flowchart showing another example of the internal processing (internal processing for detecting the rising and falling stages of the signal waveform) in the waveform determination section 12.

First, at step r1, the rise and fall times of the signal waveform are calculated from the time-voltage coordinate data table of the analysis waveform data 8. Next, step r
In 2, it is determined whether or not there is a polarity (positive or negative) change point of the slope of the analysis waveform within the calculated rise and fall times.

As a result, if there is no change point, it is determined that there is no step in the analysis waveform, and in step r5, a flag indicating that no countermeasures against waveform distortion is required is set, and the process ends. If there is a change point, it is determined in step r3 whether these voltage values are outside the voltage margin from the threshold.

As a result, if it is out of the voltage margin, a flag indicating that no countermeasures against waveform distortion is required is set in step r5, and the process ends. If it is within the voltage margin, at step r4, a flag indicating that it is necessary to take measures against waveform distortion is set, and the process ends.

That is, in the above-described analysis waveform, a step occurs in the waveform at the time of rising and falling due to reflection, which may cause a malfunction of the circuit in some cases. By making a waveform determination based on whether or not there is a step at the time of rising or falling, it is possible to detect a waveform distortion in which a step may occur in the waveform and a malfunction may occur.

(Other Embodiment 2) As a function of the waveform judging section 12 in the embodiment of FIG. 1 described above, the function of detecting a malfunction due to the voltage level of the signal waveform stage described in the above-described other embodiment 1 is also used. By doing so, it is possible to detect the waveform distortion including the rising and falling stages of the signal waveform, so that it is possible to more strictly select an optimal countermeasure for the waveform distortion, and to generate a step in the waveform. It is possible to detect a waveform distortion that may cause a malfunction.

[0056]

As described above, according to the first aspect of the present invention, the quality of the analyzed waveform data obtained by analyzing the signal waveform distortion due to the reflection and crosstalk of the electronic circuit is related to the signal waveform quality. A specified value input means for generating and inputting a specified value; a specified value and analysis waveform data input by the specified value input means; and whether a level of a signal waveform distortion falls within a specified value from the analysis waveform data. A waveform determination unit that determines the necessity of the waveform distortion countermeasure by determining whether or not the waveform distortion countermeasure is necessary; and a countermeasure library in which the waveform distortion countermeasures are collectively described. Automatically selects appropriate waveform distortion countermeasures by generating a circuit distortion countermeasure processing circuit that applies the waveform distortion countermeasures in the countermeasure library to the circuit description file, and executes analysis It is possible to select the most appropriate countermeasure for signal waveform distortion while reducing the work time by eliminating the judgment error when the countermeasure for the signal waveform distortion is performed by the human system because of the provision of the instruction means for performing the countermeasure against the waveform distortion. A transmission line analysis waveform distortion countermeasure processing device can be provided.

According to a second aspect of the present invention,
By inputting a specified value for waveform distortion as the waveform determination means, the rise and fall delay times of the waveform can be reduced.
Since the undershoot, overshoot, and threshold voltage values automatically determine whether they meet the specified values, and if they do not satisfy the specified values, it is determined that countermeasures for waveform distortion are necessary. Thus, it is possible to provide a transmission line analysis waveform distortion countermeasure processing device capable of selecting an optimal waveform distortion countermeasure more strictly.

Further, according to the third aspect of the present invention, the waveform determining means determines whether or not there is a stage at the time of rising or falling of the signal waveform. Automatically determines whether or not is at an appropriate level, and if it is not at an appropriate level, determines that countermeasures against waveform distortion are necessary. A transmission line analysis waveform distortion countermeasure processing device that can be detected can be provided.

According to a fourth aspect of the present invention, the waveform distortion countermeasure implementing means calculates an impedance of a signal line to be countermeasured, and automatically performs impedance matching for the waveform distortion countermeasure. The connection number is automatically added so that it can be embedded in the circuit description file, and the waveform distortion countermeasure processing circuit description file is automatically generated, so that the waveform distortion countermeasure with the highest noise reduction effect can be selected. A possible transmission line analysis waveform distortion countermeasure processing device can be provided.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an embodiment of a transmission line analysis system including a transmission line analysis waveform distortion countermeasure processing device according to the present invention.

FIG. 2 is an exemplary view for explaining the operation of the transmission line analysis system according to the embodiment;

FIG. 3 is an exemplary flowchart for explaining details of internal processing of a waveform determination unit in the transmission line analysis waveform distortion countermeasure processing apparatus of the embodiment.

FIG. 4 is an exemplary view for explaining a countermeasure library in the transmission line analysis waveform distortion countermeasure processing apparatus of the embodiment in more detail;

FIG. 5 is a flowchart for explaining details of internal processing of a waveform distortion countermeasure execution unit in the transmission line analysis waveform distortion countermeasure processing apparatus of the embodiment.

FIG. 6 is a flowchart for explaining details of internal processing of a waveform determination unit in a transmission line analysis waveform distortion countermeasure processing apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transmission line analyzer, 2 ... Layout data, 3 ... Element model data, 4 ... Circuit description generation part, 5 ... Circuit description file, 6 ... Transmission line analysis part, 7 ... Analysis result display part, 8 ... Analysis waveform data 9: Transmission line analysis waveform distortion countermeasure processing device, 10: specified value input unit, 11: specified value data, 12: waveform judgment unit, 13: waveform distortion countermeasure result data holding unit, 14: judgment result display unit, 15 ... Countermeasure library, 16: waveform distortion countermeasure execution unit, 17: waveform distortion countermeasure processing circuit description file.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FIG06F 15/74 310B

Claims (4)

[Claims] 1. A specified value input means for generating and inputting specified values relating to signal waveform quality with respect to analysis waveform data obtained by analyzing signal waveform distortion due to reflection and crosstalk of an electronic circuit; Means for inputting the specified value and the analysis waveform data input by the means and determining whether the level of the signal waveform distortion is within the specified value from the analysis waveform data to determine the necessity of the waveform distortion countermeasure. A waveform determining means for performing the processing, a countermeasure library in which the countermeasures against the waveform distortion are collectively described, and a countermeasure library in the circuit description file when the waveform determining section determines that the countermeasure against the waveform distortion is necessary. Waveform distortion countermeasure processing means for automatically selecting an appropriate waveform distortion countermeasure by generating a waveform distortion countermeasure processing circuit description file subjected to the above, and instructing execution of the analysis A transmission line analysis waveform distortion countermeasure processing apparatus characterized by comprising: 2. The transmission line analysis waveform distortion countermeasure processing apparatus according to claim 1, wherein the waveform determining means inputs a specified value for the waveform distortion, so that a rise time, a fall delay time, and an under time of the waveform are obtained. It is now automatically determined whether the voltage values of the shoot and overshoot and the threshold voltage satisfy the specified values, and if the specified values are not satisfied, it is determined that measures against waveform distortion are necessary. Characteristic transmission line analysis waveform distortion countermeasure processing device. 3. The transmission line analysis waveform distortion countermeasure processing device according to claim 1, wherein the waveform determination means determines whether there is a rising or falling stage of the signal waveform, and further comprising: Transmission line analysis waveform distortion characterized in that if a stage is present, it is automatically determined whether or not the stage is at an appropriate level, and if the level is not at an appropriate level, it is determined that measures against waveform distortion are necessary. Countermeasure processing device. 4. The transmission line analysis waveform distortion countermeasure processing device according to claim 1, wherein the waveform distortion countermeasure implementing means calculates an impedance of a signal line to be countermeasured, and measures the impedance for the waveform distortion countermeasure. Automatically processes connection matching and automatically adds connection numbers so that they can be embedded in the circuit description file.
A transmission line analysis waveform distortion countermeasure processing apparatus characterized in that a waveform distortion countermeasure processing circuit description file is automatically generated.