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i need a notch filter

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kakar133

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i need a notch filter to remove noise from ECG signal please help me if there is any ic or any circuit diagram of notch filter is available.......
 

I would not recomend you using a simple notch filter becouse it can degrade your signal. Is it jut a homemade project or a a real medical application project? Can you show your schematic here. Maybe your circuit can be improved with out a use of a notch filter as using the right DRL design (i am assuming you are using a DRL). And finally i would recomend you, if possible to implement the notch filter digitally. Any way, if is just a homemade project here is a basic design manual of filters provided by ti: https://focus.ti.com/lit/an/sloa093/sloa093.pdf

At the notch filter i would recomend you to change the R5 and R6 for a pot becouse they are used to tune the center frequency of the filter.

Cya
 
What do you mean by DRL design ?

---------- Post added at 20:41 ---------- Previous post was at 20:40 ----------

The circuit i have implemented to acquire ECG is attached and at the output i get a noisy ECG where i wish to filter it..
Kindly suggest me a filter.
 

 the op07's are they connected as shown?

did you zero the op07's by shorting the in inputs and connect a pot to pins 1 and 8 to zero the opamp like on the spec sheet for the op07's h**p://www.ti.com/lit/ds/symlink/op07c.pdf

did you place a .1mf cap by each ic +v to ground, and to each ic -v to ground if dual voltage?

is it LNA118 did not see the part in digikey so I cant comment on the chip. what are you using for u1?




kakar133 said:
What do you mean by DRL design ?

---------- Post added at 20:41 ---------- Previous post was at 20:40 ----------

The circuit i have implemented to acquire ECG is attached and at the output i get a noisy ECG where i wish to filter it..
Kindly suggest me a filter.
Click to expand...
 

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