A mod-W (or divide-by-N) asynchronous counter, where N=T, will count up to (N- 1) (an output of all 1’s) before resetting to all 0*s and beginning the count sequence again....

The output of a T-type flip-flop with T=) will simply toggle every time it is docked. So the circuit in Fig. 7.1 constructed from negative edge triggered T-type flip-flops will give the waveforms show...

Flip-flops' are vital ingredients in all except purely combinational logic circuits and are therefore extremely important. The SR (Set-Reset) flip-flop was introduced in the last chapter and illustrat...

All mechanical switches will ‘bounce’ when closed which means the contacts do not make immediate firm contact. The consequence of this is that the actual voltage from the switch oscillates when contac...

In this introductory text we will define two broad classes of sequential circuits, namely; asynchronous and synchronous.• The timing of the operation of asynchronous circuits, as the name implies, is ...

All of the circuits so far considered in this book have been combinational. This means that their outputs are dependent only upon the inputs at that time. We now turn our attention to sequential logic...

Heuristic implementations can broadly be considered as those that are not produced by rigorous application of Boolean logic theory. (Remember that any truth table can» in theory, be implemented in fun...

A four-bit binary adder is required to add together two four-bit binary numbers plus one carry-in bit, and produce a four-bit sum plus a carry-out bit. This is shown diagramatically in Fig. 4.14. ...