Ok slightly complicated what I want to do, so I will take it stages.
Very brief overview......
Hook your self upto a Oscilloscope and mainly you see all the noise from lights and the mains etc etc etc. So lets say I want to look at the electrical activity of the heart and electrical impulses from nerves (say in the arm etc when you move them).
I have a filter box, it plugs it can be battery powered/mains powered or passive. It has various types of filtering on it and you can pick the frequency to filter.
But for a start it can only do one frequency at a time.
1) So what would be the best filter topology to use to filter out the 50Hz mains the body picks up?
If I start there I can then look at the other swamping frequencies and deal with them. But before I try and look at amplifying other signals from the body I am interested in the filter of unwanted signals. I have read up on filters but I cant work out the best starting Topology to get rid of the 50Hz first.
End goal is a bit odd, so lets just stick with looking at heart activity first. I would really appreciate any help with this, I am not looking for the cheapest way, mainly the best way at the moment.
Thank you very much and I will try and not ask too many questions .
Very brief overview......
Hook your self upto a Oscilloscope and mainly you see all the noise from lights and the mains etc etc etc. So lets say I want to look at the electrical activity of the heart and electrical impulses from nerves (say in the arm etc when you move them).
I have a filter box, it plugs it can be battery powered/mains powered or passive. It has various types of filtering on it and you can pick the frequency to filter.
But for a start it can only do one frequency at a time.
1) So what would be the best filter topology to use to filter out the 50Hz mains the body picks up?
If I start there I can then look at the other swamping frequencies and deal with them. But before I try and look at amplifying other signals from the body I am interested in the filter of unwanted signals. I have read up on filters but I cant work out the best starting Topology to get rid of the 50Hz first.
End goal is a bit odd, so lets just stick with looking at heart activity first. I would really appreciate any help with this, I am not looking for the cheapest way, mainly the best way at the moment.
Thank you very much and I will try and not ask too many questions .