I understand that pass and band filters are not really described by their gain but by their slope. Apparently for a low pass filter it is -6db/octave? I think an octave means a doubling of the angular frequency but I'm not too sure.(adsbygoogle = window.adsbygoogle || []).push({});

And also the equation for a integrator with feedback resistance:

[tex]\frac{V_o}{V_i}=-\frac{\frac{R_f}{R_i}}{1+sR_fC_f}[/tex]

What does this calculate since you end up with a imaginary number?

And when one says you measure pass voltage at some frequency. Does it mean the f frequency or the omega angular frequency?

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# What does the -6db/octave mean?

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