## What is 2 bit counter?

input: A 2-bit number that will be used to load a value into the counter. up/down: This indicates if the counter will be counting up or counting down. If this signal is high, the counter should count down. If the signal is low, the counter should count up.

## How many JK FFs are needed for the design of 2 bit up counter?

As the maximum count is 3 which requires 2 bits to represent, so the number of J-K flip flop required is 2.

What is JK flip flop truth table?

Truth Table: When both of the inputs of JK flip flop are set to 1 and clock input is also pulse “High” then from the SET state to a RESET state, the circuit will be toggled. The JK flip flop work as a T-type toggle flip flop when both of its inputs are set to 1. The JK flip flop is an improved clocked SR flip flop.

### What is the formula of n bit counter?

An ‘N’ bit binary counter consists of ‘N’ T flip-flops. If the counter counts from 0 to 2𝑁 − 1, then it is called as binary up counter. Similarly, if the counter counts down from 2𝑁 − 1 to 0, then it is called as binary down counter.

### How many different states does a 2 bit asynchronous counter have?

Explanation: In a n-bit counter, the total number of states = 2n.

How many FFs are needed to implement a 4bit updown counter?

4 J-K flip-flops
In a 4-bit up-down counter, there are 4 J-K flip-flops required. For modulus-10 counter, N = 10.

## How many flipflops is required to generate a 2 bit asynchronous counter?

2 J-K flip- flops for synchronous counter + 2 J-K flip-flop to make 2 bit counter.

## How do you create a 2 bit counter using D flip-flop?

1. It will take 2 D flip flops, tie their clock inputs together, this will be the clock input.
2. Mod 3 count ( Least significant bit, most significant bit)
3. 00, 10, and 01.
4. Let the Q outputs of the D flip flops be the outputs of the counter.
5. The D input of the MSB flip flop (D2) = Q1 , the Q output of the LSB flip flop(Q1)

What is JK in JK flip flop?

It has the input- following character of the clocked D flip-flop but has two inputs,traditionally labeled J and K. If J and K are different then the output Q takes the value of J at the next clock edge. The inputs are labeled J and K in honor of the inventor of the device, Jack Kilby.