2021-06-27

## What is a modulo 7 counter?

A modulo 7 (MOD-7) counter circuit, known as divide-by-7 counter, can be made using three D-type flip-flops. The circuit design is such that the counter counts from 0 to 6, and on the count of seven, it automatically resets to begin the count again.

## What is mod in ripple counter?

A n-bit ripple counter can count up to 2n states. It is also known as MOD n counter. It is known as ripple counter because of the way the clock pulse ripples its way through the flip-flops. Some of the features of ripple counter are: It is an asynchronous counter.

What is a mod counter?

MOD Counters are cascaded counter circuits which count to a set modulus value before resetting. The job of a counter is to count by advancing the contents of the counter by one count with each clock pulse.

What is the modulus of 5 bit ripple counter?

Explanation: The minimum number of flip-flops used in a counter is given by: 2(n-1)<=N<=2n. Thus, for modulus-5 counter: 22 <= N <= 23, where N = 5 and n = 3. Explanation: There are 10 states, out of which MSB is high only for (1000, 1001) 2 times. Hence duty cycle is 2/10*100 = 20%.

### How many flip flop are required for mod counter?

3 D- Flip flops are needed for implementation of Mod-6 counter because you need 3 bits in order to represent 6. In the same way, we require 4 flip flops for implementation of Mod-11 counter i.e., For 11 we require 4 bits.

### How can a ripple up counter be converted to a down counter?

To convert the up counter in Fig. 5.6. 1 to count DOWN instead, is simply a matter of modifying the connections between the flip-flops. By taking both the output lines and the CK pulse for the next flip-flop in sequence from the Q output as shown in Fig.

How many flip flops are needed for mod 30 counter?

Ans. Mod – 30 counter +/- requires 5 Flip-Flop as 30 < 25.

Which counter has highest speed?

synchronous counter
The synchronous counter is the fastest counter because all the flip flop gets clock at the same time whereas in asynchronous counter clock is given only to input flip flop and it takes some time to reach all the flip flop.

#### How many flip flops are required for a MOD 10 counter?

Counting Sequence of Decade counter A decade counter is called as mod -10 or divide by 10 counter. It counts from 0 to 9 and again reset to 0. It counts in natural binary sequence. Here 4 T Flip flops are used.

Why is a ripple counter called a mod n counter?

A n-bit ripple counter can count up to 2 n states. It is also known as MOD n counter. It is known as ripple counter because of the way the clock pulse ripples its way through the flip-flops. Some of the features of ripple counter are:

How many states can a ripple counter count?

Ripple counter – A n-bit ripple counter can count up to 2 n states. It is also known as MOD n counter. It is known as ripple counter because of the way the clock pulse ripples its way through the flip-flops.

## How is a modulo 7 counter circuit made?

Modulo 7 Counter Design and Circuit. A modulo 7 (MOD-7) counter circuit, known as divide-by-7 counter, can be made using three D-type flip-flops. The circuit design is such that the counter counts from 0 to 6, and on the count of seven, it automatically resets to begin the count again.

## How many flip flops does a 3 bit ripple counter have?

The 3-bit ripple counter used in the circuit above has eight different states, each one of which represents a count value. Similarly, a counter having n flip-flops can have a maximum of 2 to the power n states. The number of states that a counter owns is known as its mod (modulo) number.