I have calculated the value of the resistors and capacitor of the Sallen-key low pass filter in order to meet some specifications i.e.
low freq gain = 22db (OK!)
cutoff freq = 11khz (OK!)
less than -70dB at freq higher than 110khz (NOT OK!)
i am currently using sallen-key (K= 3 - 1/Q) configuration.
i cant simply change the value of capacitance or resistance. i need to support it with calculation.
is there any "trick" to meet all the specification above?
low freq gain = 22db (OK!)
cutoff freq = 11khz (OK!)
less than -70dB at freq higher than 110khz (NOT OK!)
i am currently using sallen-key (K= 3 - 1/Q) configuration.
i cant simply change the value of capacitance or resistance. i need to support it with calculation.
is there any "trick" to meet all the specification above?
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