Hello! I´m new here and need a little help with some electronics. I have signals with information in the 0.2Hz - 5 Hz range (breath signal) with a DC offset of about 3V (not constant). I want to eliminate this offset voltage but still don´t change the original information. What type of highpass filters can I use for this application? How should I think? Information about both analog and digital filter of this type is interesting. Thank you!