Hey,

I was asked to design a frequency divider by 2, with COMBINATIONAL logic.

You have an idea how it could be done?

I thought of this:
What do you say?

(I forgot to mention it in the schematics, the output of the circuit is O0)

Thank you.

 

Are there any restrictions on the logic elements you are allowed to use?

 

Are there any restrictions on the logic elements you are allowed to use?

Hi t_n_k,

no, there're no restrictions.

I added above a proposed solution.

 

That solution has been proposed elsewhere so it's a likely winner.

http://www.vlsibank.com/sessionspage.asp?titl_id=321

 

doesn't that circuit in vlsibank double the frequency by 2? (not divides)

 

The topic in the link was ...

"Clock divider without using flip-flops"

Poster "padala" suggests your method ....

 

Hi,

Edit:

I got you, thanks a lot t_n_k

 

This seems like a silly exercise because as soon as you start adding feedback it technically isn't combinational anymore... the definition of combinational is that it does not depend on any past values.

A flip flop can be made of just logic gates yet it isn't considered combinational.

By definition this requires sequential logic... the thread t_n_k found is a much more accurate statement.

So anyway, that's enough useless nitpicking for now.