Borber said:Using only one generator the required phase shift is best acheived with RC integrator in first and CR differentiator in second branch of signal splitter. Phase difference or shift between branches outputs is 90°. Both RC constants must be equal for exact phase difference (can be trimmed). Ideally both signal amplitudes are allso equal at -3dB and T=RC.
Oh yes, you right! Just amplitudes change in opposite directions...Borber said:Phase shift of a particular branch regarding signal generator is changing but phase shift of one branch regarding other is frequency independent and that is what is needed.
Borber said:One signal is divided in two by splitter. First branch has ph. shift +45°and second -45°. Integration in one branch and differentiator in other but never cascaded. Shift between branches is 90°. And this is exactly what oahsen need.
Or did I misunderstand something?
Phase shift between branches is frequency independent and only signal amplitudes are changing.
Borber said:After all a low-pass is integrator and high-pass is diferentiator on certain parts of theirs transfer functions if you want it or not.
kspalla said:I would like to add few comments.
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If the time constant is very large when compared to the applied signal then LPF acts as integrator.
If the time constant is very small when compared to the applied signal then HPF acts as differentiator.
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