Question

Which is not an example of a truncated modulus?

(a) 8

(b) 9

(c) 11

(d) 15

The question was posed to me in class test.

The doubt is from Up Down Counter topic in section Counters of Digital Circuits

Answer 1

Correct option is (a) 8

For explanation I would say: An n-bit counter whose modulus is less than the maximum possible is called a truncated counter. Here, 9, 11 and 15 modulus counters are truncated counters. Whereas, modulus-8 is not a truncated counter.