Question

A NAND based S’-R’ latch can be converted into S-R latch by placing ____________

(a) A D latch at each of its input

(b) An inverter at each of its input

(c) It can never be converted

(d) Both a D latch and an inverter at its input

The question was asked during an online interview.

I want to ask this question from Flip Flops topic in division Flip-Flops of Digital Circuits

Answer 1

The correct choice is (d) Both a D latch and an inverter at its input

Explanation: A NAND based S’-R’ latch can be converted into S-R latch by placing either a D latch or an inverter at its input as it’s operations will be complementary.