Question

Describe the synchronous sequential circuits with block diagram. Also describe why it is different from combinational circuits.

Answer 1

The solution to the above problem is:-

Combinational Circuits:-

A combinational circuit is a circuit that takes some inputs and performs some logical operation and gives output.

The output of the circuit is solely depended on the current input.

These circuits do not have any memory for storing purposes.

They are also known as time-independent circuits.

Here the circuits are made by using different logic gates.

Implementing and handling of these circuits are very easy.

Sequential circuits:-

A sequential circuit is an advancement of the combinational circuit which uses current input and also the previous state-output.

It uses a memory element for storing the previous state outputs.

They are also known as time-dependent circuits.

These circuits are somewhat difficult to construct and maintain...

They are divided into types.

1.)Asynchronous circuit

2.) Synchronous circuit.

1.) An asynchronous circuit is a circuit that does not use a timed clock for performing an operation.

They are faster than sequential circuits because Synchronous uses clock signals for performing operations and whereas Asynchronous performs an operation or changes its state when there is a change in their input signal.

2.) The synchronous circuit is a circuit that uses the clock for performing operations. Because the use of this clock there are comparatively slower than asynchronous circuits.

The difference between the synchronous sequential circuit and the combinational circuit is:-

Synchronous is a sequential circuit which uses previous state outputs and present inputs for performing an operation here usage of memory is taken place.

Block diagram for it is:-

whereas a combinational circuit is a circuit whose output depends only on present input and does not use any memory element.

Block diagram for it is:-

Thank you..