How to build a analog flip flop

[EDA_hg81]

I have a 50MHZ analog clock signal from -2V to +3V.

I want to use analog flip flop to generate 25MHZ 50% duty cycle clock.

How I can do it?

Thanks.

 

[jpanhalt]

Any divide by 2 circuit will work, like this one: **broken link removed**

If you are committed to using a transistor flip-flop for experience or teaching, let us know. There are simple circuits for that.

john

 

[EDA_hg81]

Please let me know the transistor flip-flop.

I want to find a good quality analog flip flop.

Thank you so much.

 

[jpanhalt]

Please let me know the transistor flip-flop.

That I can do, or just search on transistor flip flop. Here are just two of many sources:

**broken link removed**)
Transistor RS Flip Flop Tutorial & Circuits - Flip Flop Tutorials - Electronic Hobby Projects

I want to find a good quality analog flip flop.

I am not quite sure what you mean by an "analog flip-flop." If you notice in my earlier reply, I somehow assumed you meant a transistor flip-flop.

John

 

[FvM]

That I can do, or just search on transistor flip flop. Here are just two of many sources

Unfortunately, the shown transistor flip-flops aren't suited as frequency divider, requiring a D- or T-FF rather than the shown simple RS-FFs.

 

[alexan_e]

I have a 50MHZ analog clock signal from -2V to +3V.
I want to use analog flip flop to generate 25MHZ 50% duty cycle clock.

Any divide by 2 circuit will work, like this one: **broken link removed**

A 555 circuit for 25MHz? !!!!

Alex

 

[betwixt]

They must make them fast in Ohio !

Brian.

 

[jpanhalt]

@FvM
You got me there. Long day at the farm -- really. Here is a "slightly" more complicated edge triggered, transistor flip-flop (it's about half way down): **broken link removed**

@alexan_e: I didn't mean the 555 part. I meant the frequency divider part with a flip-flop. The SN7474 shown would not make the 50 MHz part, though.

I got up at 0400 local, and post #2 was the last thing I did as I rushed out the door. Next time, I will be sure to be awake. Thanks for pointing out my oversights. I'm going to have a Scotch and go to bed. Early day tomorrow, too.

John

 

[FvM]

Here is a "slightly" more complicated edge triggered, transistor flip-flop.

I also a remember a two-transistor toggle FF with a CD circuit that provided alternate switching. I doubt that it would work well with a 50 MHz clock, I fear the same with the complicated one. Consider that even a classical TTL FF doesn't work at 50 MHz.

 

[alexan_e]

I'm not sure of the specification

I have a 50MHZ analog clock signal from -2V to +3V.
I want to use analog flip flop to generate 25MHZ 50% duty cycle clock.

I'm not sure about the voltage specification of the divided clock, he mentions -2 to +3v as the original clock that he wants to divide but what should be the range of the divided clock?

Alex

 

[EDA_hg81]

the divided clock should be -2V to +3V too.

Thank you all for your help.