Introduction to sequential circuits
A sequential circuit is a combinational logic circuit consisting of input variable logic gates and output variables.
It produces an output based on the current input and previous input variables. Therefore, it includes memory elements that have the capability to store binary information.
Types of sequential circuits
There are two types of sequential circuits, namely:
- Asynchronous sequential circuit
- Synchronous sequential circuit
Asynchronous sequential circuit
The asynchronous sequential circuit uses pulses of inputs instead of clock signals. They are faster in comparison to synchronous sequential circuits and hence are used when the speed of operation is important.
Synchronous sequential circuit
The synchronous sequential circuit uses clock signals and level inputs. The output will be of the same duration as the clock signal. They are slower as they wait for the next clock pulse to arrive.
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