Hi, I'm trying to get a clock signal of 200Hz which is synchronized with an input.

My approach is that by using a differenciator I can get the falling edge peaks, and trigger a 555 in monostable mode. The problem is that the trigger signal I have is 0V DC so the monostable won't trigger. What I need is that the clock oscillates and when it detects a peak syncronize to it.

This is what I have:


This is the input signal:


And this is the rectified differenciated signal which I want to use to synchronize the timer:

 

hi axri,
Welcome to AAC.
Please post your LTSpice asc file.
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This are the asc file and the input signal.

I also attach the LM741 model.

Thanks.

 

Hi axri,
I can now run that asc file you posted, had to rename the *.txt file to signal2.txt

This is not the same asc file that you show in your first post??


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BTW: Is this Homework, I see that you are a student?

 

My bad. The asc file is this one. Sorry for the confusion.

 

Hi ax,
Consider this option, note trig modification.

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Is this homework?

NOTE: Use Alternate Mode in LTSpice

 

It is a project I am working for.

I have trouble simulating it as it gets stuck and doesn't run correctly.

 

hi,

NOTE: Use Alternate Mode in LTSpice
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Great, thanks.

By adjusting the timer RC values I got to this point:



I have 2.5ms signals at the falling edges, so it is now synchronized, but I need to output the full clock signal.

 

Hi,
OK, modify your circuit to give the full signal and post the asc file, I will check it out.
BTW: your circuit layout in LTS is very poor, try my layout.

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The input signal is just that file.
What I need is to complete the output signal with the full clock like the red signal I draw:

 

Hi,
How can you get a 200Hz clock pulse from a triggered 555 Monostable?
What is the purpose of the project?
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Sorry for the confusion, the circuit works great, just what I wanted.
This will be used in a receptor to recover the clock from a different code.
Thank you very much!