[Moved] Reading a digital signal from a cable without galvanic contact

[zzh]

The following picture shows a digital signal (blue) and a version obtained without galvanic contact (red). I'm looking for a simple way to obtrain the original, blue, signal, from the red one. ¿any ideas?

Kind regards
Hector

 

[erikl]

Re: Reading a digital signal from a cable without galvanic contact

• Transformer
• Optical isolation

 

[zzh]

Re: Reading a digital signal from a cable without galvanic contact

Maybe I posted it in the wrong place. I move the question to Digital Design.