Download Logic Synthesis and Verification Algorithms by Gary D. Hachtel, Fabio Somenzi PDF
By Gary D. Hachtel, Fabio Somenzi
This booklet blends mathematical foundations and algorithmic advancements with circuit layout concerns. every one new strategy is gifted within the context of its software to layout. throughout the examine of optimum two-level and multilevel combinational circuit layout, the reader is brought to uncomplicated suggestions, equivalent to Boolean algebras, neighborhood seek, and algebraic factorization. equally, throughout the research of optimum sequential circuit layout, the reader is brought to graph algorithms, finite kingdom structures, and language thought. through the e-book, recurrent issues comparable to department and certain, dynamic programming, and symbolic implicit enumeration are used to set up optimum layout rules.
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Extra resources for Logic Synthesis and Verification Algorithms
The logic sharing between the XOR3 subcircuit and the MAJORITY subcircuit is one of the primary objectives of logic synthesis. In the mapped circuit, the critical path delay3 of the circuit can still be estimated by the greatest number of logic levels on any path between any input and any output (not counting the pentagonal input and output buffers). In the mapped circuit, this critical path length is 6 corresponding to the length of the critical path Note that the critical path length is measured through the combinational logic, regarding the latches as an open circuit.
10, a graph may have a label associated with each edge, In this case the graph is called an edge labeled graph, and is denoted G = (V, E, X), where the label set is in one to one correspondence with the edge relation E. 6, edge labeled graphs are essential to the discussion of finite state machines and automata. A graph may also have a label associated with each vertex, in which case it is denoted G = (V, W, E). Vertex-labeled graphs are essential to the discussion of Moore machines. 12, the fanins of gate 9 are gates 6 and 8, and the fanouts of buffer gate 2 are gates 4, 5, and 6.
2 The Technology Independent View — A Bit-Serial Full Adder Circuit A crucial aspect of any optimization problem is the accuracy of the cost function used. In logic synthesis, there is no guarantee that truly minimizing some cost function based on area estimation would result in a truly minimum size for the fabricated chip. Logic synthesis tools have typically identified two types of cost models, each with their own assortment of synthesis tools. The first is called a technology independent cost model, in which the area cost estimate is taken as the number of logic symbols, called literals in a given set of logic formulas.