Digital Systems: Principles and Design

Fundamental Mode

Sequential Circuits

In this chapter, we shall learn the asynchronous sequential circuit operations in a mode

called fundamental modetheir stable and unstable states, analysis, output specifica-

tions, feedback cycles, races, race-free assignments in their design and circuit implemen-

tation.

OBJECTIVE

We learnt in Chapter 15 the following concepts:

1. A sequential circuit is a circuit made up by combining the logic gates such that the

required logic at the output(s) depends not only on the current input logic conditions

but also on the past inputs, outputs and sequences.

2. A sequential circuit has the memory elements like flip flops ...