JPH07200655A - Automatic design equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an automatic design device capable of arranging components to be arranged close to each other on a printed circuit board. [Structure] A knowledge pattern storage unit 106 that stores, as a knowledge pattern, conditions of parts to be placed close to each other on a printed circuit board, printed circuit board design information that stores parts to be placed on the printed circuit board, and wiring information between the parts. Storage unit 10
5 and each component stored in the printed circuit board design information storage unit 105, based on the wiring information, it is determined whether the knowledge pattern stored in the knowledge pattern storage unit 106 is satisfied, and a group of components satisfying the knowledge pattern is determined. The present invention is characterized by comprising a group classification means for classifying as one group, and a placement determining means for determining placement on a printed circuit board, with a component group classified into one group as one placement element.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic design device,
More specifically, the present invention relates to an automatic design device that automatically arranges components on a printed circuit board and connects the components.

[0002]

2. Description of the Related Art In recent years, the design of printed circuit boards has been replaced by human labor, and CAD (Computer Aided Desig)
Automatic design equipment such as n) has been used. This automatic designing device automatically determines the positions of components and wirings at the time of designing a printed circuit board, and is a device necessary for reducing the labor of the operator for designing the printed circuit board.

As a conventional automatic design apparatus, for example,
Published by Mimatsu Data System (May 20, 1993), supervised by Gotaro Odawara and Satoshi Goto.
There is one described in "D". According to this automatic design apparatus, first, the arrangement of the parts on the printed circuit board is determined from the connection information between the parts, and then the external shape of the parts and the connection between the pins of the parts are made by using the part information and the connection information between the parts. I was designing a printed circuit board.

[0004]

However, there are some parts to be arranged on the printed circuit board which are desired to be arranged close to each other in terms of electrical characteristics. For example, a resistor or a capacitor that suppresses noise generation with respect to a signal input to or output from the IC, the IC, and the like. However, in the conventional automatic placement device, the placement of the parts on the printed circuit board is determined only by the connection information between the parts. Therefore, for example, it is not always necessary to place the noise countermeasure parts near the IC whose noise generation is desired to be suppressed. There was a case where it was not arranged, and it caused a malfunction of the circuit.

In view of the above situation, it is a first object of the present invention to provide an automatic design apparatus capable of arranging components which are desired to be arranged close to each other on a printed circuit board. A second object of the present invention is to arrange the components arranged close to each other on the printed circuit board by changing the relative position of the components arranged close to each other so that the arrangement at the arrangement place on the printed circuit board is changed. It is to provide an automatic designing device that can perform.

[0006]

In order to achieve the first object, the invention according to claim 1 is a knowledge pattern storage unit for storing a condition of a component to be closely arranged on a printed circuit board as a knowledge pattern. Knowledge patterns are stored based on the wiring information for the components to be placed on the printed circuit board, the printed circuit board design information storage unit that stores wiring information between the components, and each component stored in the printed circuit board design information storage unit. Judge whether the knowledge pattern stored in the department is satisfied,
Group classification means for classifying a group of parts satisfying the knowledge pattern as one group, and layout determining means for determining the layout on the printed circuit board with the group of parts classified as one group as one layout element It is characterized by that.

In order to achieve the second object,
According to a second aspect of the present invention, a placement pattern storage unit for storing different placement patterns for different components in a group, and when the placement space for the components on the printed circuit board is insufficient, the placement elements are classified by the group classification means. If there is a component group that has been placed, the placement pattern read means that reads from the placement pattern storage unit a placement pattern different from the current placement pattern as the placement pattern of the group, and the placement pattern read to the parts group of the group. Is applied and the arrangement of each component on the printed circuit board is executed again.

[0008]

According to the first aspect of the invention, the group classification means satisfies the knowledge pattern stored in the knowledge pattern storage section based on the wiring information for each part stored in the printed circuit board design information storage section. It is determined whether or not, and a group of parts that satisfy the knowledge pattern is classified as one group. Then, the placement determining means determines the placement on the printed circuit board by using the parts group classified into one group as one placement element.

According to the second aspect of the present invention, the placement pattern read-out means includes the parts group classified by the group classification means in the placement elements when the placement space of the parts on the printed circuit board is insufficient. If there is, a different layout pattern from the current layout pattern is read from the layout pattern storage unit. Then, the read layout pattern is applied and the layout of each component on the printed circuit board is executed again.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) The automatic design apparatus according to Embodiment 1 arranges a component to be arranged on a printed circuit board based on component information of the component arranged on the printed circuit board, connection information between the components, and information on the condition of the component to be arranged closely. Among the parts, group the parts that you want to place close to each other. Then, the grouped parts are arranged on the printed circuit board as I-parts like the ungrouped individual parts, and then the wiring pattern is drawn to complete the printed circuit board.

FIG. 1 is a block diagram showing the configuration of the automatic designing apparatus according to the first embodiment. 100 is an input unit, 101 is a knowledge pattern matching component determination unit, 102 is a group creation unit, 1
Reference numeral 03 is an arrangement determination unit, 104 is an output unit, 105 is a printed circuit board design information storage unit, and 106 is a knowledge pattern storage unit. The input unit 100 is composed of a keyboard.
The shape of the printed board and the number of layers of the board are received from the operator. Then, these pieces of information are stored in the printed circuit board design information storage unit 105 described later. In addition, an instruction from the operator to execute the design of the printed circuit board is accepted.

The printed circuit board design information storage section 105 stores the outer shape of the printed circuit board and data for arranging the parts on the board and wiring between the parts. Specifically, the knowledge pattern storage unit 105 stores the shape and the number of layers of the printed circuit board input from the input unit 100, and the component data of the component to be arranged on the printed circuit board,
It stores a parts list and wiring data. The component data is information indicating the component name, the component type, and the component shape of the component arranged on the printed circuit board. The parts list is used for grouping the parts and selecting again the parts to be arranged on the printed circuit board by this grouping, and includes a passive parts list and an active parts list. The passive component list is a list of passive components such as resistors and capacitors arranged on the printed circuit board. The active component list is
3 is a list of active components such as ICs arranged on a printed circuit board. An example thereof is shown in FIG. FIG. 5 shows a circuit diagram which is the basis of the printed circuit board of the passive component list and the active component list of FIG. Passive components R1 and R in FIG.
2, C1, active components IC1 and IC2 are all stored in the passive component list and the active component list shown in FIG.

The wiring data is information used not only for arranging the components on the printed circuit board and for wiring between the arranged components, but also for grouping the components. This wiring data is information indicating the connection between the pins of the components arranged on the wiring printed circuit board and the attributes of the pins. An example of the wiring data is shown in FIG. Further, FIG. 3 corresponds to the circuit diagram of FIG. In FIG. 3, the net information is information indicating a path (net) of which component pin and which component pin are connected. The net name column stores the recognition name (net name) of the net. The pin attribute column stores attributes of pins of active components such as ICs. For example, the net name “c” is the 10-pin (I
C1-10), pin 2 of IC2 (IC2-2), and R
3 shows a route connecting to the 1st pin (R3-1) of No.3. And, of these pins, the pin IC1 of the active component
Reference numeral -10 is an input pin, active component pin IC1-10 is an input pin, and IC2-2 is an output pin. The net having the net name “c” is connected as shown in FIG.

The knowledge pattern storage unit 106 includes components that are desired to be arranged close to each other, for example, an IC and a terminating resistor R that corrects distortion of an input signal or an output signal of the IC, or
Capacitor C to prevent fluctuation of IC and voltage of this IC
And the like are stored. Specifically, the connection condition of the resistance (R) and the capacitor (C) (hereinafter,
It is called a knowledge pattern. ) Is remembered. An example of this knowledge pattern is shown in FIG. In the figure, the knowledge pattern name column stores the recognition name of the knowledge pattern. The part in the knowledge pattern condition column stores the distinction between the resistance (R) and the capacitor (C), and the connection pin attribute is the attribute of the pin connected to one pin of the part (input pin,
The distinction between the output pin and VCC) and the type of component (IC, R, or C) of the pin are stored. Similarly, for the other pin, the attribute of the connected pin and the type of component are stored. The active component column stores which attribute of the pin the IC to be placed in close proximity is.
For example, the knowledge pattern name “B” is a resistor, one of which is connected to the output pin of the IC and the other of which is I.
The C input pin is connected. Then, it is shown that the IC to which these resistors are arranged close to each other is the IC of the output pin.

Upon receiving an instruction to execute the design of the printed circuit board from the input section 100, the knowledge pattern compatible component determination section 101 determines all the passive components (resistor R and capacitor C) among the components arranged on the printed circuit board. It is compared with the knowledge pattern in the knowledge pattern storage unit 106. In this collation, first, the printed circuit board design information storage unit 105 is searched to find out which component of one passive component is connected to which pin, and what is the attribute of the pin (hereinafter referred to as collation information). And the attribute and part name of the connected pin (hereinafter, the attribute and part name of this pin are collectively referred to as connection information). Next, the knowledge pattern storage unit 106 is searched to find a knowledge pattern that matches the collation information. This process is performed for all passive components arranged on the printed board. Then, with reference to the passive component that matches the knowledge pattern (hereinafter, referred to as a compatible passive component) and the coupling information, the IC to which the compatible passive component is to be arranged (hereinafter referred to as a compatible passive component approach IC). ) And find out. Then, the information thus found is associated and output to the group creation unit 102.

When the group creating unit 102 receives the information from the knowledge pattern compatible component determining unit 101, the group creating unit 102 searches the information to find a compatible passive component having the same compatible passive component approach IC. Then, the matching passive component having the same matching passive component approaching IC and the matching passive component approaching I
C is associated (hereinafter, this associated one is referred to as a group).

The layout determining unit 103 is used by the group creating unit 10
Receive group information from 2. Then, from this group information, the compatible passive components and the compatible passive component approaching ICs that constitute this group are extracted. Then, on the printed circuit board, an arrangement area is created in which the distance between each compatible passive component and the compatible passive component approaching IC is equal to or less than a predetermined distance (hereinafter, this arrangement area is referred to as a group area). In addition,
The predetermined distance is a distance that is effective in suppressing the generation of noise. Then, the printed circuit board design information storage unit 10
The component information of No. 5 is searched to find components other than the compatible passive component and the compatible passive component approach IC.

Next, the group area is set on the printed circuit board, and the parts of the group are arranged within this group area. Then, referring to the connection information of the printed circuit board design information storage unit 105, the above-mentioned finding and the parts are also arranged on the printed board, and thereafter, the wiring within the groups and the parts found in the previous period is performed. The output unit 104 includes a CRT and a CRT control unit. The placement and wiring information of the components of the printed circuit board is received from the placement determination unit 103, and a diagram showing the printed circuit board is displayed on the CRT according to this information.

The operation of the automatic designing apparatus according to the first embodiment will be described below with reference to the flowcharts shown in FIGS. 6 and 7. It should be noted that the specific example used in the following description is an example in which the components shown in the circuit diagram of FIG. 5 are grouped in light of the knowledge pattern conditions shown in FIG. 4 and arranged on the printed circuit board. First, the user operates the keyboard of the input unit 100 to input the shape and the number of layers of the printed circuit board to be created. Then, the shape and the number of layers of the printed circuit board are stored in the printed circuit board design information storage unit 105. Then, the operator operates the keyboard of the input unit 100 to input an instruction to execute the printed circuit board design (S10).
0).

Then, this instruction is input to the knowledge pattern compatible component determination unit 101. The knowledge pattern matching component determination unit 101 divides the knowledge patterns of the components arranged on the printed circuit board according to the procedure shown in FIG. First, one passive component is read from the passive component list of the printed circuit board design information storage unit 105 (S20).
0). Then, this becomes a search key, and the wiring data in the printed circuit board design information storage unit 105 is searched. The passive component is connected to the pin of which component, and the attribute of the pin (collation information), and the component name and pin number (coupling information) of the connected component are extracted. Next, the matching information is used as a search key to search the knowledge pattern in the knowledge pattern storage unit 106 to find a knowledge pattern that matches the matching information. If there is no matching knowledge pattern, the process proceeds to S204 (S201, S202).

Next, the attribute of the pin of the adaptive passive component approaching IC connected to this passive component is read out from the active component column of the knowledge pattern thus found. Then, using the attribute of this pin as a search key, the previously read connection information of the passive component is searched to read the component name of the compatible passive component approaching IC. Then, the component name of the compatible passive component approaching IC and the component name of the passive component are associated with each other (S203). After that, the process returns to S200, and passive components other than the above passive components are read from the passive component list of the printed circuit board design information storage unit 104, and the collation information is extracted in the same manner as above, the collation with the knowledge pattern, the component of the compatible passive component approach IC The name, the pin number, and the component name of the passive component are associated with each other repeatedly (S200 to S2).
03). This processing is performed for all passive components stored in the passive component list.

Specifically, first, the passive component "R1" is read from the passive component list of FIG. Next, this "R
The wiring data 104 (a) in FIG. 3 is searched using "1" as a search key, and from the net information of the net name "a" and the net name "b", the matching information of the R1 "the pin connected to one side is The output pin of the IC and the pin connected to the other pin are the input pins of the IC. " Further, the coupling information "the component connected to one of R1 is IC2 and the pin attribute is the output pin, and the component connected to the other of R1 is IC1 and the pin attribute is the input pin" is searched out. It Next, as a result of searching the knowledge pattern condition column in the knowledge pattern 105 (a) of FIG. 4 using this matching information as a search key, the matching knowledge pattern name “B” is searched. Then, the active component column of the knowledge pattern name “B” and the previously read coupling information of the passive component R1 are referred to, and the compatible passive component approach IC2 of the passive component R1 is read. Then, this IC2 is associated with the component name R1 of the passive component. Next, the R next to the passive component R1 previously read from the passive component list of FIG.
2 is read out and the same processing as above is performed.

As a result, the knowledge pattern "A" is matched,
The compatible passive component approach IC1 and the component name R2 are associated with each other. As for the last passive component C1, as a result of the above processing,
IC1 that conforms to the knowledge pattern "C" and conforms to passive components
And the component name C1 are associated with each other. Next, after all the passive components arranged on the printed circuit board are associated with each other, the associated components are output from the knowledge pattern matching component determining unit 101 to the group creating unit 102.

The group creating unit 102 creates a group of compatible passive components (S205). First, the information from the knowledge pattern matching component determination unit 101 is searched, and the component name of the passive component having the same passive component proximity IC and the passive component proximity IC are extracted. And associate this.
That is, a group is created. Then, these groups are output to the arrangement determining unit 103 as information.

Specifically, the passive components "R1, R2, C1" having the same passive component approaching IC and the passive component approaching I
C "IC1" is extracted. Then, these are associated as one group. Then, the associated “R1, R2, C1, IC1” is output to the arrangement determining unit 103. Returning to FIG. 6, in the placement determining unit 103, the received group is searched, and the compatible passive components and the compatible passive component approaching ICs configuring this group are read out. Then, with reference to the component list of the printed circuit board design information storage unit 105, components other than the compatible passive component and the compatible passive component approach IC are searched (S102). Next, the parts and groups thus found are placed on the printed circuit board. As for the arrangement of groups, a group area is created such that the distance between each compatible passive component forming the group and the compatible passive component approaching IC is less than or equal to a predetermined distance, this group area is set on the printed circuit board, and within this area. A group of parts forming a group is arranged.

Specifically, the parts "R
1, R2, C1, IC1 ”is read. Next, a group area for arranging R1, R2, C1, and C2 within a predetermined distance (this distance is r) with respect to the compatible passive component approaching IC1 is created and set on the printed circuit board. As shown in 7, IC1 and R1, R2, C1, C
2 is placed.

The parts other than the group are arranged based on the connection information of the printed circuit board design information storage unit 105 (S103). After that, the connection information of the printed circuit board design information storage unit 105 is referred to again and the wiring between the components is performed (S104). Then, information on the arrangement of the components on the printed circuit board and wiring between the components is output to the output unit 104. The output unit 104 displays a diagram showing a printed circuit board on which components are arranged and wiring is performed on the CRT according to the information (S10).
5).

(Embodiment 2) FIG. 9 is a block diagram showing the configuration of a parts group creating and arranging device according to a second embodiment of the present invention. In this figure, the major difference from the first embodiment is that the arrangement pattern storage unit 200 and the arrangement pattern reading unit 201 are provided and the arrangement failure output unit is added to the arrangement determining unit 103.

The layout pattern storage unit 200 stores different layouts (hereinafter referred to as layout patterns) of the components within the group area of the group in the component group forming the group. It has a storage location for storing arrangement patterns and a table of contents. The storage location is such that, for a predetermined group, the arrangement pattern of the component groups forming the same is given priority and stored at a predetermined address, and an example thereof is shown in FIG. In the figure, in a group of one IC and six passive components, four layout patterns different from each other are stored. The four priority levels are "1", "2", "3",
"4" is attached. Then, it is shown that the address of the place storing this arrangement pattern is "6000". The table of contents table associates each group with the address of the storage location of the layout pattern of the group. An example thereof is shown in FIG. In the figure, the number of constituent components represents the total number of ICs and passive components that form a group. The storage location indicates an address for storing the arrangement pattern. For example, the component number “7” indicates a group of one IC and six passive components, and the layout pattern thereof indicates that the address of the storage location is “6000”.

The placement failure output means of the placement determining unit 103 is
When the arrangement determining unit 103 arranges the components on the printed circuit board and the space for arranging the components is insufficient, a signal indicating the arrangement failure is output to the arrangement pattern reading unit 201. The arrangement pattern reading unit 201 changes the arrangement pattern of the group in the arrangement element when the arrangement space of components on the printed circuit board is insufficient. Specifically, when the signal from the placement failure output means of the placement determining unit 103 is received, the total number of ICs and passive components (the number of constituent components) is found from the group information from the group creating unit 102. . Then, the arrangement pattern storage unit 2
00, search for the layout pattern of the number of components,
The layout pattern with the priority "1" is read. Then, the arrangement of the group components on the group area on the printed circuit board is changed to the arrangement of the arrangement pattern read out previously, and the arrangement of the group and the non-grouped components on the printed circuit board is determined again. Let it be done. Furthermore,
When a placement failure signal is received from the placement failure output means of the placement determining unit 103, the group creating unit 10 is activated as described above.
From the information of the same group that was read first from 2, the number of constituent parts is found, and from the placement pattern storage unit 200,
The layout pattern of the number of constituent parts is searched. Then, this time, the arrangement pattern of the priority order “2” is read. After that, change the placement of group parts on the group area on the printed circuit board to the layout of the read layout pattern, and place the group and ungrouped parts on the printed circuit board again, as described above. The determination unit 103 is made to perform it. Further, when a signal is further received from the placement failure output means of the placement determining unit 103, the above process is performed for the priority order "3", and thereafter, the above process is continued with the placement pattern with the priority order lowered.

The operation of the automatic design apparatus according to the second embodiment will be described below with reference to the description of the first embodiment according to the flowchart of FIG. The specific examples in the following description are the result of grouping the components to be arranged on the printed board. A group consisting of one IC and six passive components was created. Then, when the components were arranged on the printed circuit board, the arrangement space on the printed circuit board became insufficient. Therefore, this is an example of a case where the printed circuit board is designed by changing the layout pattern of the previous group shown in FIG. 10 according to the priority order.

First, the user operates the keyboard of the input unit 100 to input the shape and the number of layers of the printed circuit board to be created. Then, the shape and the number of layers of the printed circuit board are stored in the printed circuit board design information storage unit 105. Thereafter, the operator operates the keyboard of the input unit 100 to input an instruction to execute the printed circuit board design (S300).

Then, this instruction is input to the knowledge pattern compatible component determination unit 101. After that, as in Example 1,
Knowledge pattern division is performed for components arranged on the printed circuit board. That is, the passive component that matches the knowledge pattern (the adaptive passive component) and the adaptive passive component approaching IC of this adaptive passive component are associated and output to the group creation unit 102. Then, in the group creating unit 102, the component name of the passive component having the same passive component approaching IC and the passive component approaching IC are associated and output to the placement determining unit 103 (S301). Then, the arrangement determining unit 103 creates the group area of this group. Then, the group area is set on the printed board together with the parts other than the group, and the group parts are arranged within this area (S302).

Next, the processing which characterizes the second embodiment will be described. When arranging the components on the printed circuit board, if the space for arranging the components is not insufficient, the component arrangement and the wiring between the components are completed and output to the output unit 104 to arrange the components and the wiring between the components on the CRT. A diagram showing the completed printed circuit board is displayed. On the other hand, if the space for arranging the components is insufficient, the placement failure output means of the placement determining unit 103 outputs a signal to the placement pattern reading unit 201 in the subsequent stage (S3).
04). Then, the arrangement pattern of the groups arranged on the printed circuit board is changed. First, the total number of ICs and passive components (the number of constituent components) is found from the group information from the group creation unit 102. Then, the layout pattern storage unit 200 is searched for a layout pattern corresponding to the number of constituent parts, and the layout pattern having the priority "1" is read (S304 to S306). Specifically, the number of constituent parts is seven. Therefore, the storage location "6000" is read by searching the table of contents in FIG. From the arrangement pattern of "6000" shown in FIG. 10, the arrangement pattern of priority "1" is read. It should be noted that, in designing this printed circuit board, if a group is not created, the process proceeds to S308, and this design is finished while the design of the printed circuit board is not completed.

Next, the arrangement of the group parts on the group area on the printed circuit board was changed to the arrangement of the arrangement pattern of the priority "1" just read, and the group was not grouped on the printed circuit board again. The placement determination unit 103 is caused to place the component (S307). When a placement failure signal is received again from the placement failure output means of the placement determining unit 103, the placement pattern of the number of constituent components that has been previously found is searched from the group information from the group creating unit 102, as described above. . Then, this time, the arrangement pattern of the priority order “2” is read. After that, change the placement of group parts on the group area on the printed circuit board to the layout of the read layout pattern, and place the group and ungrouped parts on the printed circuit board again, as described above. The determination unit 103 is made to perform it. Also,
Further, when a signal is received from the arrangement failure output means of the arrangement determining unit 103, the above processing is performed for the priority order "3", and thereafter, the above processing is continued with the arrangement pattern having the lower priority order.

Specifically, the layout pattern of priority "1" in FIG. 10 is arranged on the printed circuit board as shown in FIG. However, since the layout area on the printed circuit board is small, the layout pattern of priority "1" cannot be arranged. Then, the placement failure output means outputs a signal to the placement pattern reading unit 201. The placement pattern reading unit 201 reads out the placement pattern having the priority "2" in FIG. 10 and places it on the printed circuit board. However, this layout pattern also lacks the layout area on the printed circuit board. After that, the same processing as described above is performed for the layout pattern with the priority "3", and it is determined that the layout area is insufficient. As a result, the above processing is performed on the remaining arrangement pattern of the priority order “4”. In this case,
As shown in FIG. 3, it is accommodated within the arrangement area of the printed circuit board. Therefore, the layout pattern of the priority "4" is selected and arranged on the printed circuit board. The arrangement position and the arrangement area of the group on the printed circuit board shown in FIGS. 12 and 13 are not changed because the last arrangement element to be arranged on the printed circuit board by the group whose arrangement pattern is changed. This is because it becomes an element.

[0037]

As described above, according to the present invention, it is possible to arrange the components which are desired to be arranged close to each other on the printed circuit board as they are. Therefore, for example, it is possible to prevent a resistor, a capacitor, or the like, which suppresses noise from being generated in the active component, from being arranged apart from each other on the printed circuit board, and prevent malfunction due to that. Further, the relative positions of the components arranged close to each other can be changed to perform the arrangement suitable for the arrangement space of the printed circuit board.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an automatic designing apparatus according to a first embodiment of the present invention.

FIG. 2 is a printed circuit board design information storage unit 10 according to the first embodiment.
It is a figure which shows an example of the parts list of FIG.

FIG. 3 is a printed circuit board design information storage unit 10 according to the first embodiment.
It is a figure which shows an example of the wiring data of No. 5.

FIG. 4 is a printed circuit board design information storage unit 10 according to the first embodiment.
It is a figure which shows an example of the knowledge pattern of FIG.

5 is a circuit diagram which is a base of the printed circuit board corresponding to the parts list shown in FIG. 2 and the wiring data shown in FIG.

FIG. 6 is a flowchart showing an operation procedure of the automatic designing apparatus according to the first embodiment.

7 is a flowchart of one processing step (knowledge pattern division and group creation processing) of the flowchart of FIG.

FIG. 8 shows a state in which the components of the circuit diagram of FIG. 5 are grouped and arranged on a printed circuit board.

FIG. 9 is a block diagram showing a configuration of an automatic designing device according to a second embodiment of the present invention.

FIG. 10 is a diagram showing an example of a table of contents table of an arrangement pattern storage unit 200 according to the second embodiment.

FIG. 11 is a diagram showing an example of an arrangement pattern stored in a storage location of an arrangement pattern storage unit 200 according to the second embodiment.

FIG. 12 is a flowchart showing a procedure of operations of the automatic designing apparatus according to the second embodiment.

FIG. 13 is a diagram showing a state in which storage of one arrangement pattern on a printed circuit board is being tried.

FIG. 14 is a diagram showing a state in which storage of one arrangement pattern on a printed circuit board is being tried.

[Explanation of symbols]

 100 input unit 101 knowledge pattern matching component determination unit 102 group creation unit 103 placement determination unit 104 output unit 105 printed circuit board design information storage unit 106 knowledge pattern storage unit

Claims (2)

[Claims] 1. A knowledge pattern storage unit for storing conditions of parts to be closely arranged on a printed circuit board as a knowledge pattern, a part to be arranged on the printed circuit board, and a printed circuit board design for storing wiring information between the parts. For the information storage unit and each component stored in the printed circuit board design information storage unit, it is determined based on the wiring information whether the knowledge pattern stored in the knowledge pattern storage unit is satisfied, and a group of components that satisfy the knowledge pattern is determined. An automatic design characterized by comprising: a group classification means for classifying as one group; and a placement determination means for determining placement on a printed circuit board, with a group of parts classified as one group as one placement element. apparatus. 2. The automatic designing apparatus according to claim 1, further comprising: an arrangement pattern storage section for storing arrangement patterns different from each other in a group and an arrangement space for the parts on the printed circuit board. If there is a part group classified by the group classification means in the elements, the arrangement pattern read means for reading a different arrangement pattern from the arrangement pattern storage unit as the arrangement pattern of the group, An automatic design apparatus characterized by applying the read layout pattern to a group of parts and re-arranging each part on a printed circuit board.