GBHT
Newbie level 6
how to calculate the critical frequency of this circuit?
circuit: https://obrazki.elektroda.pl/68_1344097910.jpg
circuit: https://obrazki.elektroda.pl/68_1344097910.jpg
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If the resistors and capacitors are the same vale, F = 1/(2*Pi*R*C). Otherwise F = 1/(2*Pi*SQRT(R1*R2*C1*C2)).
thank you...i was looking for pole frequency..now since you have told about 3db cut-off frequency, can you tell me how to calculate it ( forButterworth)?Hi godfreyl,
I think you should inform GBHT that this formula gives only the pole frequency.
On the other hand - I do not know what the questioner needs (what is "critical" frequency?): pole frequency or 3dB cut-off frequency?.
In the latter case he must specify the desired approximation (Butterworth, Chebyshev, ...)
thank you...i was looking for pole frequency..now since you have told about 3db cut-off frequency, can you tell me how to calculate it ( forButterworth)?