Shift Registers - Technical MCQs

Q1:

Assume a 4-bit Johnson counter is initially cleared. After the first clock pulse the output is 0001. After the next clock pulse the output will be ________.

A 0011

B 0010

C 1000

D 0110

ANS:A - 0011

In Johnson ring counter complement of the last output is given to first input. So, the output for 0001 combinations will be 0000, which not listed in the options. To get the output as 0011 the input should be 0111.