SOLVED: If we design a second-order Butterworth filter so that a 100 Hz pass signal has a 0.98 Vo/Vi ratio: a) What is the cutoff frequency (in Hz)? b) If we are designing a Sallen-Key active filter with the same second-order cutoff frequency and select a 0.01µF capacitor for C1, what is the value for the resistors? c) If a 4000 Hz signal with a 1 Volt amplitude was input to this filter, what is the expected output amplitude?

Lecture 24: Butterworth Filters | Signals and Systems | Electrical Engineering and Computer Science | MIT OpenCourseWare