Adigital lowpass butterworth filter is to be designed according to the following specifications: the passband magnitude is constant to within 0.85 db for frequencies below 0.12r and the stopband attenuation is greater than 20 db for frequencies between 0.6m and t. sketch the figure describing these specifications

You have a resistor and a capacitor of unknown values. first, you charge the capacitor and discharge it through the resistor. by monitoring the capacitor voltage on an oscilloscope, you see that the voltage decays to half its initial value in 2.70 miss . you then use the resistor and capacitor to make a low-pass filter. what is the crossover frequency fc?