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I am very confused regarding the cutoff frequency:
i want to find the cutoff frequency of a bandpass filter from the simulation curve... lets say the gain is 41.8dB so what is the 3db cutoff frequency ? I have attached a curve for reference ,,, thanks
The cutoff frequency is when the output level has dropped -3dB which is 0.707 times the maximum amplitude and is half the output power.
Fred D. told you the lower cutoff frequency. You can see the upper cutoff frequency yourself.
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