Table of Contents
- 1 Which flip flop can be used to divide the input clock frequency by 2?
- 2 What is divide by N counter?
- 3 How is a clock divided?
- 4 What is a divide by 2 circuit?
- 5 What is an n counter?
- 6 What is the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz?
Which flip flop can be used to divide the input clock frequency by 2?
toggle mode flip-flops
For frequency division, toggle mode flip-flops are used in a chain as a divide by two counter. One flip-flop will divide the clock, ƒIN by 2, two flip-flops will divide ƒIN by 4 (and so on).
What is divide by N counter?
A Divide by N counter implies that it divides the input clock frequency by N ie; if you cascade four flip-flops then, the output of every stage is divided by 2, if you are taking the output from the 4th flip-flop, then its output frequency is clock frequency by 16 (2^4).
How do you find the frequency of a flip flop?
1 Answer. If you have a binary counter, modulo M = 2^N, where N is the number of flip-flops, then the frequency of the most significant bit (I assume this is what you’re referring to with “output frequency”) will be f/M = f/(2^N), where f is the input frequency.
How is a clock divided?
A day consists of two 12-hour periods, for a total of 24 hours. An hour consists of 60 minutes. A minute consists of 60 seconds. Seconds are subdivided on a decimal system into things like “hundredths of a second” or “millionths of a second.”
What is a divide by 2 circuit?
The divide by two circuit employs one logic d-type element. Simply by entering the pulse train into the clock circuit, and connecting the Qbar output to the D input, the output can then be taken from the Q connection on the D-type. D-type frequency divide by two circuit. The circuit operates in a simple way.
Why a counter is called as divide-by-N frequency counter?
Both say that the counter can transition between ‘n’ states. It is called Divided by n because if you notice the frequency of MSB bit of a counter, it always has a frequency = freq(clk)/n. Hence the name.
What is an n counter?
Counters are sequential logic devices that follow a predetermined sequence of counting states triggered by an external clock (CLK) signal. In this example, there are only two bits ( n = 2 ) then the maximum number of possible output states (maximum modulus) for the counter is 2n = 22 or 4. …
What is the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz?
5 kHz
Determine the output frequency for a frequency division circuit that contains 12 flip-flops with an input clock frequency of 20.48 MHz. Output Clock frequency = 20480000/4096 = 5000 i.e., 5 kHz.