Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
1998-02-09
2001-04-17
Smith, Matthew (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
Reexamination Certificate
active
06219820
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a printed circuit board design device used for an electronic equipment, or the like.
DESCRIPTION OF THE PRIOR ART
For the purpose of confirming presence or non-presence of an inappropriate wiring (for example, a proximity of wirings in radio circuit of radio equipment, or the like) or correcting the inappropriate wiring, it is often practiced until now that a signal wire name is affixed to each wiring in the printed circuit board design.
For example, in Japanese Patent Application Laid-open No. 205471/1992, is disclosed that when a signal wire name is to be affixed to the wiring of a circuit of a designed printed circuit board or to be corrected, the signal name affixed so far is retrieved and displayed in a menu form in order to reduce a time and labor required for inputting the same name over and over again and, by designating the signal wire name thus displayed, an input mistake is reduced.
Again, in Japanese Patent Application Laid-open No. 70973/1992, a device is disclosed wherein a retrieving is made by the signal wire name of a wiring to be confirmed and even when a signal wire affixed with a desired signal wire name is disposed on a plurality of drawings, there is no need to confirm the signal wire name by every drawing. Hence, its workability is enhanced.
However, the signal wire name input by the designer while designing a circuit is input or selected by the designer himself each time and, for this reason, the signal wire naming becomes irregular and irresponsible and a trouble arises where no distinction can be made among similar signal wire names affixed. Also, when one wiring belongs to more than two kinds of circuits, a trouble arises where the corresponding relation with the circuit is not clear because there is no device available which can properly affix a signal wire name.
Also, if the designation of a signal wire name is not appropriate when a circuit is confirmed, a retrieving omission occurs or the designation of a signal wire name becomes complex and a lot of time and labor is spent in the operation.
SUMMARY OF THE INVENTION
This invention is made in order to solve the above troubles. It is an object of the present invention to offer a printed circuit board design device which can easily and speedily make a proper naming for a wiring. Also, it is another object of the present invention to offer the printed circuit board design device which can easily and speedily make a proper naming for the wiring even when one wiring comprising a circuit of the printed circuit board belongs to more than two kinds of circuits.
The printed circuit board design device of the present invention comprises a wiring selection means for selecting one or more than two wiring in the circuit displayed with a layout, an input means for inputting an attribute information showing to the selected wiring said wiring belongs to which function of the circuit and a signal wire name adding means wherein, when a plurality of the attribute information are input into one wiring, each of the attribute information is connected in series and made into a signal wire name for said one wiring, and wherein the signal wire name precisely showing that one wiring belongs to several kinds of attribute is given to said one wiring.
The data related to the wiring inside the input layout data and the data of the affixed signal wire name are made to correspond to each other and memorized.
The printed circuit board design device of the present invention has a candidate group of the attributes information which is kept in memory in advance and which is attached to the wiring comprising a circuit of the printed circuit board. It displays said group of the attribute information and selects a desired attribute information from the displayed group of the attribute information, thereby helping the designer to affix a proper signal wire name to the wiring.
The printed circuit board design device of the present invention comprises an input means for inputting the attribute information of the wiring to be retrieved in the displayed circuit, a retrieving means for retrieving the wire affixed with a signal wire name including at least in part said information input as above, and a retrieving result display control means for displaying a retrieving result in said display means. As a result, the wiring displayed in a circuit can be confirmed if it is made into a proper circuit by retrieving on the basis of the attribute information.
In the printed circuit board design device of the present invention, the attribute information candidate group information of the wiring to be retrieved in the circuit displayed is memorized in advance and by displaying the attribute information of the candidate group and the attribute information to be retrieved from the displayed candidate group is selected, thereby a proper attribute information can be input at the time of retrieving.
REFERENCES:
patent: 5371851 (1994-12-01), Pieper
patent: 5898595 (1999-04-01), Bair
patent: 5999726 (1999-12-01), Ho
patent: 4-070973 (1992-03-01), None
patent: 4-205471 (1992-07-01), None
Amano Takashi
Arai Satoshi
Chiba Norimichi
Hayashihara Mikio
Ishibe Manabu
Do Thuan
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Kabushiki Kaisha Toshiba
Smith Matthew
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