Hi to you All, good lads, Im working in a project;
https://forum.allaboutcircuits.com/...n-on-a-led-amplify-stage.162725/#post-1429674
This project requires, two filters, the first a notch filter to block all the 60Hz signal, and then a Pass band filter to allow the selected frequency travel the net to pass it.
Im Making this two test of two filters that seems promising, the firs is a Tnotch filter, and the second is an Inductor and capacitor in parallel but i got this responses on the scope, and I got some certain questions;
The T notch Filter was calculated with this great tool online:
http://sim.okawa-denshi.jp/en/TwinTCRtool.php
So it gives me this values and then I proceed to assembly the circuit;
In theory with the above values the filter may be capable of -3DB of attenuation yes in practice this is not the case, I check twice the components.
Is this normal for the T notch filter?
Then I assembly this other notch filter described in some diagram, its is simply an Inductor 10mH and a Capacitor of 0.1uF in parallel ;
and this is the scope response;
So the Inductor capacitor it is better, yet The signal has some distortion on it, this is due the lack of tunning of the filter?
There is some better filter for this application?
Thanks for the insights.
Kind regards.
-Alex.
https://forum.allaboutcircuits.com/...n-on-a-led-amplify-stage.162725/#post-1429674
This project requires, two filters, the first a notch filter to block all the 60Hz signal, and then a Pass band filter to allow the selected frequency travel the net to pass it.
Im Making this two test of two filters that seems promising, the firs is a Tnotch filter, and the second is an Inductor and capacitor in parallel but i got this responses on the scope, and I got some certain questions;
The T notch Filter was calculated with this great tool online:
http://sim.okawa-denshi.jp/en/TwinTCRtool.php
So it gives me this values and then I proceed to assembly the circuit;
In theory with the above values the filter may be capable of -3DB of attenuation yes in practice this is not the case, I check twice the components.
Is this normal for the T notch filter?
Then I assembly this other notch filter described in some diagram, its is simply an Inductor 10mH and a Capacitor of 0.1uF in parallel ;
and this is the scope response;
So the Inductor capacitor it is better, yet The signal has some distortion on it, this is due the lack of tunning of the filter?
There is some better filter for this application?
Thanks for the insights.
Kind regards.
-Alex.