Question

The logic circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called ________________

(a) Combinational circuits

(b) Sequential circuits

(c) Latches

(d) Flip-flops

I had been asked this question in my homework.

My doubt is from Flip Flops in section Flip-Flops of Digital Circuits

Answer 1

Correct answer is (b) Sequential circuits

Easiest explanation: In sequential circuits, the output signals are fed back to the input side. So, The circuits whose outputs at any instant of time depends only on the present input but also on the past outputs are called sequential circuits. Unlike sequential circuits, if output depends only on the present state, then it’s known as combinational circuits.