hi

i want to design a frequency divider without flipflops and not anlog.

Is it possible?

 

What frequency limits are you wanting??

 

i neef to divided the input freq by 2 at the output.....

if it's possible i want to use only logic gats..

 

You can use a Cd4013, or a Cd4017

 

cd4013 is a d-ff and i cant use flipflops...i need to use only logic gates

but tnx anyway

 

What is your rationale for not using flipflops?
Did you know flipflops are made from gates?

 

ya i know....

it's an assignment from my professor...

 

ya i know....

it's an assignment from my professor...

Does that mean you can't use flip-flops you make yourselves? I mean flip-flops are made out of logic gates after all, like MrChips said.

Also don't just go a wikipedia. make sure you're copying a flip flop, not a gated latch. you can't use a latch as a frequency divider.

 

yes exactly, i need to make a frequency divider using combinational logic gates

 

ya i know....

it's an assignment from my professor...

Read this.
Note that this blog is incomplete. It should get you started anyway.
You need to follow up with two stages, one following the other with the clock inverted into the second stage.

 

Read this.

Wait what the OP is for a TRUE T flip-flop. Looking at that, the circuits won't get him very far, as they are not TRUE flip-flops but rather gated latches which aren't edge triggered. If he tries to turn these false flip-flops into a false T flip-flop, he will just get an invalid state since the circuits you posted are level triggered rather than edge triggered.

THIS is a complete frequency halver aka T flip-flop:
http://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+10.20027730826997+50+5+50 151+368+256+480+256+0+2+5+5 151+368+128+480+128+0+2+0+5 w+480+128+480+160+0 w+480+160+368+224+0 w+480+256+480+224+0 w+480+224+368+160+0 w+368+160+368+144+0 w+368+224+368+240+0 151+208+128+320+128+0+2+5+5 151+208+32+320+32+0+2+5+5 151+208+256+320+256+0+3+5+5 151+208+352+320+352+0+2+0+5 w+208+48+208+64+0 w+208+64+320+96+0 w+208+112+208+96+0 w+208+96+320+64+0 w+320+64+320+32+0 w+208+272+208+288+0 w+208+288+320+320+0 w+320+320+320+352+0 w+208+336+208+320+0 w+208+320+320+288+0 w+320+112+368+112+0 w+320+272+368+272+0 w+320+160+208+224+0 w+208+16+176+16+0 w+176+400+320+400+0 w+208+256+144+256+0 w+144+144+208+144+0 w+208+368+144+368+0 R+144+256+80+256+1+2+100+2.5+2.5+0+0.5 M+480+128+544+128+0+2.5 w+144+144+144+256+0 w+208+240+208+224+0 w+320+128+320+160+0 w+320+352+320+400+0 w+176+400+176+16+0 w+320+96+320+112+0 w+320+112+320+128+0 w+320+256+320+272+0 w+320+272+320+288+0 w+480+256+480+384+0 w+480+384+144+384+0 w+144+384+144+368+0 o+31+64+0+2086+5+0.00009765625+0+-1+0+Q o+30+64+0+2086+5+0.00009765625+0+-1+0+clk