Two marks Questions with Answers

Two Marks Questions with Answers

Q.1 What is the minimum number of flip-flops needed to design a counter of modulus 60 ? AU: May-04

Ans.:2ⁿ ≥ 60       Therefore n = 6

Q.2 What is the minimum number of flip flops needed to build a counter of modulus 8 ?  AU: June-16

Ans. :2ⁿ>8           Therefore n = 3

Q.3 What is meant by programmable counter? Mention its application.  AU: May-10

Ans. : A counter that divides an input frequency by a number which can be programmed, is called programmable counter.

Applications of programmable counter

1. Frequency division

2. Digital clock

3. Stop watch

4. Programmable logic controllers.

Q. 4 Name two sequential switching circuits.  AU: May-03

Ans. : Counter, shift register.

Q.5 Define synchronous counter.  AU: Dec.-06

Ans. : When counter is clocked such that each flip-flop in the counter is triggered at the same time, the counter is called synchronous counter.

Q.6 Define asynchronous counter.

Ans. : The counter in which the output of the current flip-flop drives the clock input of the net higher-order flip-flop is called asynchronous counter.

Q.7 D raw the state diagram of MOD-10 counter.  AU: Dec.-08

Q.8 Draw the timing diagram showing the output of a 2 stage synchronous counter with respect to its clock signal. 

(Refer section 5.4.1) AU: May-11

Q.9 How many flip flops are required for designing synchronous MOD 50 counter? AU: May-09

Ans. : >50