Question

In a sequential circuit, the output at any time depends only on the input values at that time.

(a) Past output values

(b) Intermediate values

(c) Both past output and present input

(d) Present input values

The question was asked in an interview.

This interesting question is from Procedure for the Design of Combinational Circuits topic in portion Arithmetic Circuits of Digital Circuits

Answer 1

The correct choice is (c) Both past output and present input

For explanation: In a sequential circuit, the output at any time depends on the present input values as well as past output values. It also depends on clock pulses depending whether it’s synchronous or asynchronous sequential circuits.