http://www.radio-electronics.com/info/circuits/opamp_notch_filter/opamp_notch_filter.php
In the link above I used their 50hz example with 1% resistors, and 5% tolerance polyester capacitors. The calculation shows 49hz...which is pretty close to 50...I know the Q is supposed to be high on notch filters which is actually what I need but not too high. Does anyone have an idea of the Q of the posted circuit? And are my tolerances good enough?
My issue is I need to cut out 50hz and only 50hz well I mainly just need there to be a good cutoff before about 100hz. Well, I tested the output on my oscope after running a 50hz and I get about 200mV starting and it keeps climbing with volume. I used a voltage divider of 8.6k to 1.5k to reduce the output of a 17VRMS(before clipping) swing from the amp. I am really trying to get the harmonics of 50hz to show on the scope. The harmonics will come in after beeing near/in the clipping region but I don't think it show any significant distance in amplitude from the fundamental, it just seemed proportional to volume turn.
In the link above I used their 50hz example with 1% resistors, and 5% tolerance polyester capacitors. The calculation shows 49hz...which is pretty close to 50...I know the Q is supposed to be high on notch filters which is actually what I need but not too high. Does anyone have an idea of the Q of the posted circuit? And are my tolerances good enough?
My issue is I need to cut out 50hz and only 50hz well I mainly just need there to be a good cutoff before about 100hz. Well, I tested the output on my oscope after running a 50hz and I get about 200mV starting and it keeps climbing with volume. I used a voltage divider of 8.6k to 1.5k to reduce the output of a 17VRMS(before clipping) swing from the amp. I am really trying to get the harmonics of 50hz to show on the scope. The harmonics will come in after beeing near/in the clipping region but I don't think it show any significant distance in amplitude from the fundamental, it just seemed proportional to volume turn.
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