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Generated January 22, 2018

Method for designing semiconductor integrated circuit and automatic designing device

Patent Number: 6,845,349

Patent Information

Abstract
A program for automatically designing a logic circuit used for a method of designing a pass transistor circuit, by which the number of required transistors, delay time, power consumption and chip area of the pass transistor circuit is reduced. The program executes the following steps: a) receiving inputted logic functions which define the logical relationship between the inputs and the outputs, and an inputted target specification, b) generating a binary decision diagram from part of the logic functions received at (a), c) replacing the diagram nodes formed at (b) with pass transistor circuit, d) judging whether or not the simulation characteristics of the pass transistor circuit described in (c) meets the target specification described in (a), and executing the following steps when the judgment is “no”, e) replacing part of the diagram generated by the procedure described in (b) with another diagram, f) allocating a new binary decision diagram to the control inputs of the nodes of the replaced diagram prepared at (e), and g) repeating the steps (c) and (d) for the diagram prepared at (f).
Patent Number: 6,845,349
Issue Date: 2005-01-18

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Executive Summary

Summary

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