Question

Which of the following statements are true?

(a) Asynchronous events does not occur at the same time

(b) Asynchronous events are controlled by a clock

(c) Synchronous events does not need a clock to control them

(d) Only asynchronous events need a control clock

This question was posed to me in class test.

My question is taken from Asynchronous Down Counter topic in chapter Counters of Digital Circuits

Answer 1

Right answer is (a) Asynchronous events does not occur at the same time

Easy explanation: Asynchronous events does not occur at the same time because of propagation delay and they do need a clock pulse to trigger them. Whereas, synchronous events occur in presence of clock pulse.