Computerized generation of truth tables for sequential and combinatorial cells
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United States of America Patent
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May 16, 1995
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N/A
app pub date -
Dec 17, 1992
filing date -
Dec 17, 1992
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Expired
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Abstract
A computerized method of generating a truth table of a cell in a library of circuit cells includes representing basic elements of the cells in a hardware description language, representing each cell as a set of equations in that language and parsing the equations each in accordance with a respective abstract data tree of which the `leaves` or extremities are signal values or constants. The parsing of each equation yields a respective partial truth table. The partial truth tables are merged to provide a complete truth table, which is preferably subjected to Boolean and/or expression optimization to reduce the number of entries in the truth table.
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