Simulation of selected logic circuit designs
First Claim
1. A logic circuit design simulation system comprising;
- data table generating means for generating incrementally modifiable design elements table and incrementally modifiable connectivity table;
logic circuit design entry means for entering logic circuit design data into said data table generating means;
integrated circuit model input means for entering integrated circuit model data into said data table generating means;
simulating means including;
test vector signal entry means for entering test vectors;
design simulation program generating means for generating an executable design simulation program from said modifiable design elements table, said modifiable connectivity table and selected test vectors entered into said simulating means; and
executing means for executing said design simulation program;
whereby one or more selected values in either or both of said modifiable design elements table and said modifiable connectivity table may be incrementally modified with logic circuit design data for quick simulation of a logic circuit design.
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Abstract
A system and method for selectively simulating logic circuit designs in which a data tables generator receives information from a schematic entry program or netlist entry file and produces data tables for use by a simulator. A designer provides inputs to the data tables generator from a schematic entry program or a netlist entry file. The data tables generator generates from the information received a table of used integrated circuits and a table of their connections. A simulator then receives the output from the data tables generator and produces a design simulation program table that executes integrated circuit model subroutine stored in an integrated circuit model reference library and netlist subroutines stored in a netlist connectivity table. The system may also be used for testing logic circuits on a printed circuit board by capturing signals from a potentially defective logic section of the printed circuit board and feeding them into test points of the integrated circuit simulated by the computer simulator.
126 Citations
17 Claims
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1. A logic circuit design simulation system comprising;
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data table generating means for generating incrementally modifiable design elements table and incrementally modifiable connectivity table; logic circuit design entry means for entering logic circuit design data into said data table generating means; integrated circuit model input means for entering integrated circuit model data into said data table generating means; simulating means including; test vector signal entry means for entering test vectors; design simulation program generating means for generating an executable design simulation program from said modifiable design elements table, said modifiable connectivity table and selected test vectors entered into said simulating means; and executing means for executing said design simulation program; whereby one or more selected values in either or both of said modifiable design elements table and said modifiable connectivity table may be incrementally modified with logic circuit design data for quick simulation of a logic circuit design. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for simulating selected logic circuit comprising;
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entering logic circuit design data; entering integrated circuit model data; generating incrementally modifiable design elements table and incrementally modifiable connectivity table from said logic circuit design data and said integrated circuit model data entered; simulating operation of said selected logic circuit;
said simulation including;entering test vector signals into simulating means; generating an executable design simulation program from said design elements table, said connectivity table, and said test vectors; and executing said executable design simulation program; whereby one or more selected values in either or both of said modifiable design elements table and said modifiable connectivity table may be incrementally modified with logic circuit design data for quick simulation of a logic circuit design. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification