CROSS TALK AVOIDING METHOD
PROBLEM TO BE SOLVED: To produce an LSI layout hardly causing a cross talk. SOLUTION: Transition frequencies 101 of all instances are calculated from a net list 100 describing the connection of the instances, a pass transition frequency 102 is calculated from the average of the transition frequencie...
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description | PROBLEM TO BE SOLVED: To produce an LSI layout hardly causing a cross talk. SOLUTION: Transition frequencies 101 of all instances are calculated from a net list 100 describing the connection of the instances, a pass transition frequency 102 is calculated from the average of the transition frequencies of the respective instances comprising a pass between flip-flops, and a transition frequency card 103 including names of the flip-flops of a starting point and a terminal of a noticed pass, an average transition frequency of the pass, a pass adjacent to the pass, and a transition frequency ratio to the adjacent pass is produced. Then, the transition frequency card 103 and outline disposition/wiring information 104 are inputted, and corrected disposition/wiring information 105 is formed by rearranging the wiring order of the pass and the adjacent pass so that the transition frequency ratio to the adjacent pass is reduced as much as possible and the layout 106 prepared based thereon. COPYRIGHT: (C)2004,JPO |
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SOLUTION: Transition frequencies 101 of all instances are calculated from a net list 100 describing the connection of the instances, a pass transition frequency 102 is calculated from the average of the transition frequencies of the respective instances comprising a pass between flip-flops, and a transition frequency card 103 including names of the flip-flops of a starting point and a terminal of a noticed pass, an average transition frequency of the pass, a pass adjacent to the pass, and a transition frequency ratio to the adjacent pass is produced. Then, the transition frequency card 103 and outline disposition/wiring information 104 are inputted, and corrected disposition/wiring information 105 is formed by rearranging the wiring order of the pass and the adjacent pass so that the transition frequency ratio to the adjacent pass is reduced as much as possible and the layout 106 prepared based thereon. 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SOLUTION: Transition frequencies 101 of all instances are calculated from a net list 100 describing the connection of the instances, a pass transition frequency 102 is calculated from the average of the transition frequencies of the respective instances comprising a pass between flip-flops, and a transition frequency card 103 including names of the flip-flops of a starting point and a terminal of a noticed pass, an average transition frequency of the pass, a pass adjacent to the pass, and a transition frequency ratio to the adjacent pass is produced. Then, the transition frequency card 103 and outline disposition/wiring information 104 are inputted, and corrected disposition/wiring information 105 is formed by rearranging the wiring order of the pass and the adjacent pass so that the transition frequency ratio to the adjacent pass is reduced as much as possible and the layout 106 prepared based thereon. 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SOLUTION: Transition frequencies 101 of all instances are calculated from a net list 100 describing the connection of the instances, a pass transition frequency 102 is calculated from the average of the transition frequencies of the respective instances comprising a pass between flip-flops, and a transition frequency card 103 including names of the flip-flops of a starting point and a terminal of a noticed pass, an average transition frequency of the pass, a pass adjacent to the pass, and a transition frequency ratio to the adjacent pass is produced. Then, the transition frequency card 103 and outline disposition/wiring information 104 are inputted, and corrected disposition/wiring information 105 is formed by rearranging the wiring order of the pass and the adjacent pass so that the transition frequency ratio to the adjacent pass is reduced as much as possible and the layout 106 prepared based thereon. 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subjects | BASIC ELECTRIC ELEMENTS CALCULATING COMPUTING COUNTING ELECTRIC DIGITAL DATA PROCESSING ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY PHYSICS SEMICONDUCTOR DEVICES |
title | CROSS TALK AVOIDING METHOD |
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