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EP0199304A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of automatic circuit translation

Assignee: Hitachi Microcomputer System Ltd
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Filing: 1986-04-18
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Granted: —
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Expires: 2006-04-18
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Abstract

Abstract In a case where an electronic circuit having the same function is to be realized by a different device, it is indispensable to prepare circuit diagrams conforming to devices and to utilize them for the job of circuit simulation or chip layout. When the circuit diagrams are to be automatically translated for the above purpose, translation rules become different depending upon the connective relations of an element to be translated, with other elements in the circuit or upon a function performed by the element. The present invention puts the rules into knowledge from the viewpoint of knowledge engineering and utilizes it thereby to realize the intended purpose. It is characterized in that, when a circuit constructed of first sort of elements is to be translated into a circuit constructed of second sort of elements different from the first sort of elements, appropriate ones among translation rules are automatically selected for the respective first or second sort of elements on the basis of judged results based on knowledge groups of connective relations with other elements of the same circuit and are applied to the first or second sort of elements.

Inventors

  • 👤 Toshinori Watanabe
  • 👤 Fumihiko Mori
  • 👤 Tamotsu Nishiyama
  • 👤 Makoto Furihata
  • 👤 Yasuo Kominami
  • 👤 Noboru Horie

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-30 06:30
CPC Classifications
G; G06; G06F; G06F30/00; G06F30/30; G06F30/32; G06F30/327

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 133 words
An automatic circuit translation method comprising memory means to store translation rules of circuit element representations which are determined depending upon connective relations of each element constituting a circuit with other elements constituting the circuit and also upon a function of the element performed within the circuit, wherein when a circuit constructed of first sort of elements is to be translated into a circuit constructed of second sort of elements different from said first sort of elements, appropriate ones of said translation rules stored in said memory means are automatically selected for the respective first or second sort of elements on the basis of judge results based on knowledge groups of said connective relations with said other elements of the same circuit and are applied to said first or second sort of elements.
Claim 2
Dependent Claim 133 words
An automatic circuit translation method comprising memory means to store translation rules of circuit element representations which are determined depending upon connective relations of each element constituting a circuit with other elements constituting the circuit and also upon a function of the element performed within the circuit, wherein when a circuit constructed of first sort of elements is to be translated into a circuit constructed of second sort of elements different from said first sort of elements, appropriate ones of said translation rules stored in said memory means are automatically selected for the respective first or second sort of elements on the basis of judge results based on knowledge groups of said connective relations with said other elements of the same circuit and are applied to said first or second sort of elements.
Claim 3
Dependent Claim 31 words
An automatic circuit translation method according to Claim 1, wherein said connective relations with said other elements are judged with parameters which include a possible fanout number of said each element.
Claim 4
Dependent Claim 28 words
An automatic circuit translation method according to Claim 1, wherein rules for simplifying predetermined circuits are stored as said translation rules to be stored in said memory means.
Claim 5
Dependent Claim 30 words
An automatic circuit translation method according to Claim 1, wherein said knowledge groups include knowledge groups whose parameters are fanin numbers and fanout numbers of said first sort of elements.
Claim 6
Dependent Claim 26 words
An automatic circuit translation method according to Claim 4, wherein said knowledge groups are further represented as properties concerning respective nor elements of a cmos circuit.
Claim 7
Dependent Claim 27 words
An automatic circuit translation method according to Claim 1, wherein said knowledge groups include rules which indicate reducible elements in connections of said second sort of elements.
Claim 8
Dependent Claim 30 words
An automatic circuit translation method according to Claim 1, wherein said knowledge groups include rules which have been determined by connections similar to those of said second sort of elements.

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