Recursive Realizations of Combinational Circuits
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In this chapter we illustrate some applications of Boolean reasoning in the design of multiple-output switching circuits. The stimulus applied to the circuit shown in Figure 9.1 is an input-vector, X = (x1, x2,..., x m ) , of binary signals; its response is an output-vector, Z = (z1, z2,..., z n ), of binary signals. We assume the circuit to be combinational, by which we mean that the value of Z at any time is a function of the value of X at that time. A sequential circuit, on the other hand, is one for which the value of Z may depend on past values of X as well as on its present value.
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