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# asdf - William Lu A08341624 Anant Upreti A08304589 Monday...

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0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0 5 10 15 X: 0.522 Y: 1.008 Damping Factor ζ Magnitude |H(f)| (dB) |H(f)| vs ζ , William Lu A08341624 Anant Upreti A08304589 Monday Section Lab 2: DSL Low-pass Active Filter Design Motivation : In this lab, we want to get familiarized with the Butterworth filter response and the Sallen-Key topology by designing a low pass filter that meets certain specifications. Prelab 1. Approximation (a) Find the lowest possible f 0 and check if the filter meets the spec at 32 kHz and 180 kHZ. (b) From the figure, we see that a 1dB peak occurs when damping factor is 0.522 . z=0.1:.001:0.70; hsquared=1./(4*z.^2.*(1-z.^2)); hdb=10*log10(hsquared); plot(z,hdb, 'LineWidth' ,3) xlabel( 'Damping Factor \zeta' ) ylabel( 'Magnitude |H(f)| (dB)' ) title([ '|H(f)| vs \zeta, ' ]) grid on

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