Fractional divider tool

Search Advanced search…. New posts. Search forums. Log in. Install the app. Contact us. Close Menu. Welcome to EDAboard. To participate you need to register. Registration is free. Click here to register now. Register Log in. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. For example, if I set it to give me out of a 50MHz clock, it gives me instead. Something may be off with the math I guess, I didn't have a chance to check though.

Hi, I guess that this thread is dead, but. This looked very interesting to me for my project too, but as Marcelo has said, the frequency is half of that selected. Could the originator please revisit this page and give us some idea on how to fix this please? In an earlier post I have talked about generating a lower frequency from a higher clock frequency, by means of integer division. The disadvantage of such a system is that the values of output frequencies are limited. In this post, I will take the case when you have to generate a frequency with a fractional division.

A method called Dual modulus prescaler is used for this. This calculator will automatically update the answer or solution when any of the inputs change. The inputs include the whole number, numerator or denominator inputs fields for both the dividend and divisor. Select the type of fraction or whole number. Do not select either field for improper or proper factions. This is the default. Selected Mixed for mixed fractions and whole for whole numbers.

Enter the left fraction or dividend. This the fraction to the left of the division operand. Enter the right fraction or divisor. This is the fraction to the right of the operand.

Observe the step by step solution and various answers. Note: If viewing this page on a desktop or laptop, the numerator and denominator inputs can be changed with the mouse wheel, up and downs spinner buttons and keyboard arrow keys.