# How do you make a 3 bit synchronous down counter?

## How do you make a 3 bit synchronous down counter?

3 bit Synchronous Down Counter

1. Decide the number of Flip flops – N number of Flip flop(FF) required for N bit counter.
2. Write excitation table of FF –
3. Draw State diagram and circuit excitation table – Number of states = 2n, where n is number of bits.
4. Find simplified equation using k map –
5. Create circuit diagram –

## What is 3 bit synchronous down counter?

The 3-bit Asynchronous binary up counter contains three T flip-flops and the T-input of all the flip-flops are connected to ‘1’. All these flip-flops are negative edge triggered but the outputs change asynchronously. The clock signal is directly applied to the first T flip-flop.

What is 3 bit synchronous up counter?

A synchronous counter is one whose output bits change state simultaneously, with no ripple. In these types of counters, the flip flops are clocked at the same time by a common clock pulse. Thus, all the flip flops change state simultaneously (in parallel). It advances upward in sequence (0, 1, 2, 3, 4, 5, 6, 7).

What is 3 bit synchronous up counter JK flip flop?

In the 3-bit synchronous counter, we have used three j-k flip-flops. As in the diagram, The J and K inputs of FF0 are connected to HIGH. The inputs J and K of FF1 are connected to the output of FF0, and the J and K inputs of FF2 are connected to the output of an AND gate, which is fed by the outputs of FF0 and FF1.

### How many different states a 3 bit synchronous counter have?

How many different states does a 3-bit asynchronous down counter have? Explanation: In a n-bit counter, the total number of states = 2n. Therefore, in a 3-bit counter, the total number of states = 23 = 8 states.

### How many different states does a 3 bit synchronous counter have?

What is synchronous up down counter?

A synchronous 4-bit up/down counter built from JK flipflops. Depending on the logic value on the Up/nDown input, the counter will increment or decrement its value on the falling edge of the clock signal. The additional enable input enables (1) or disables (0) counting.

How do you make a synchronous counter?

The procedure to design a synchronous counter is as follows.

1. Choose the number of flip flops using 2n ≥ N.
2. Choose the type of flip flop.
3. Draw the state diagram of the counter.
4. Draw the excitation table for the counter.
5. Derive the flip flop input functions using K-map.
6. Draw the logic diagram of the synchronous counter.

## What is synchronous down counter?

In synchronous counter, the clock input across all the flip-flops use the same source and create the same clock signal at the same time. So, a counter which is using the same clock signal from the same source at the same time is called Synchronous counter.