Question

One major difference between a NAND based S’-R’ latch & a NOR based S-R latch is ____________

(a) The inputs of NOR latch are 0 but 1 for NAND latch

(b) The inputs of NOR latch are 1 but 0 for NAND latch

(c) The output of NAND latch becomes set if S’=0 & R’=1 and vice versa for NOR latch

(d) The output of NOR latch is 1 but 0 for NAND latch

The question was asked in semester exam.

The origin of the question is Flip Flops in chapter Flip-Flops of Digital Circuits

Answer 1

The correct answer is (a) The inputs of NOR latch are 0 but 1 for NAND latch

To elaborate: Due to inverted input of NAND based S’-R’ latch, the inputs of NOR latch are 0 but 1 for NAND latch.