Crosstalk verifying device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKeiko Mishima, Yoshifumi Sasaki, Tomoo Ishida, Takahiro Oda
Life of this patent
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Abstract
A node and coupling capacity selecting portion 4 extracts nodes (NDI) which simultaneously change from a net list (NTL) of a circuit diagram based on an input pattern (IP) and extracts a coupling capacity (CCI) not less than a designated value, and determines a node whose coupling capacity should be considered from the extraction result, and creats and holds information (ND/CC) of the judged nodes and the coupling capacities thereof. Then, simulation of the selected nodes including the coupling capacities thereof is conducted so that the result of the simulation is displayed in a waveform to thereby enable an efficient and highly precise crosstalk verification.
Claims17
A crosstalk verifying device for verifying a crosstalk influence of a coupling capacity parasitic in a circuit comprising:
- node and coupling capacity selecting means for automatically selecting nodes and coupling capacities each having a crosstalk influence on a circuit operation to be considered, from a net list and layout data obtained from a circuit diagram, based on an input circuit operation pattern,
- wherein the node and coupling capacity selecting means extracts nodes satisfying a predetermined node extraction condition, extracts coupling capacities satisfying a predetermined coupling capacity extraction condition, and determines and selects the nodes to be verified based on the extracted nodes and the extracted coupling capacities.
Dependencies are inferred from the claim text.