Synchronous Sequential Logic The digital circuits considered thus ...

More documents

Recommendations

Info

a sequential circuit is specified by a time sequence of inputs, outputs, and internal states. In contrast, the outputs of combinational logic depend only on the present values of the inputs There are two main types of sequential circuits, and their classification is a function of the timing of their signals. A synchronous sequential circuit is a system whose behavior can be defined from the knowledge of its signals at discrete instants of time. CS1023 4
The behaviour of an asynchronous sequential circuit depends upon the input signals at any instant of time and the order in which the inputs change an asynchronous sequential circuit may be regarded as a combinational circuit with feedback. Because of the feedback among logic gates, an asynchronous sequential circuit may become unstable at times. The instability problem imposes many difficulties on the designer. These circuits will not be covered CS1023 5
Page 1 and 2: Synchronous Sequential Logic The di
Page 3: The binary information stored in th
Page 7 and 8: In practice, the clock pulses deter
Page 9 and 10: The design of synchronous circuits
Page 11 and 12: Consequently, the speed at which th
Page 13 and 14: S T O R A G E E L E M E N T S : L A
Page 15 and 16: RS LATCH (NOR IMPLEMENTATION) CS102
Page 17 and 18: The q and ~q outputs are known as t
Page 19 and 20: assume that both the reset and set
Page 21 and 22: The unstable condition indicated by
Page 23 and 24: If both halves of the function were
Page 25 and 26: The latch has two useful states. Wh
Page 27 and 28: CS1023 27
Page 29 and 30: A basic SR latch and two additional

Synchronous Sequential Logic The digital circuits considered thus ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?