Frequency Divider

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EngIntoHW

Member

• Aug 26, 2010

• #1

Hey,

How can you design a frequency divider which divides the input frequency by 3?

It relates to digital systems, So I'd like to use Counters and DFFs.

Thanks for any help.

 

ericgibbs

Well-Known Member

Most Helpful Member

• Aug 26, 2010

• #2

EngIntoHW said:

Hey,

How can you design a frequency divider which divides the input frequency by 3?

It relates to digital systems, So I'd like to use Counters and DFFs.

Thanks for any help.

Click to expand...

hi,
Which counters do you have on the bench.?

 

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EngIntoHW

Member

• Aug 26, 2010

• #3

Hey Eric,

I got only DFFs, no counters.

It would be better doing it without using any counters, but I wasn't sure if it's possible.

 

Last edited: Aug 26, 2010

crutschow

Well-Known Member

Most Helpful Member

• Aug 26, 2010

• #4

A Google search came up with this.

 

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EngIntoHW

Member

• Aug 26, 2010

• #5

Hi,

I actually found it on google, however there're no DFFs there.

 

Mikebits

Well-Known Member

• Aug 26, 2010

• #6

Well you can make a JK out of a D.
**broken link removed**

 

RCinFLA

Well-Known Member

• Aug 26, 2010

• #7

There are two configurations possible. One uses half cycle, one uses full cycles. Must use 50-50% input duty cycle signal and half cycle circuit to get 50-50% duty cycle on output. The full cycle divider gives a 67-33% output duty cycle. If you are using it to drive an RF mixer you want the 50-50% duty cycle.

 

MikeMl

Well-Known Member

Most Helpful Member

• Aug 26, 2010

• #8

Here is an old posting. It actually generates 2/3 of the input frequency, but you could just take the 1/3 frequency at S1 or S2.

 

Attachments

• Divide3.png

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krytenrobot

New Member

• Aug 26, 2010

• #9

use a cd4017 decade counter.

https://www.electro-tech-online.com/custompdfs/2010/08/4017.pdf