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Unformatted text preview: 3 7. A&S 14.95, 8. The circuit below is known as a “notch” filter, used to remove a narrow range of frequencies (for example, an undesired resonance). a) Determine the transfer function for this circuit. Assume that “IN” and “OUT” are voltages. b) Plot the magnitude Bode plot for this filter. c) Determine the center frequency for the notch filter, and reduction in magnitude at the center frequency (in dB). 9. The circuit below is a low-pass filter known as a Butterworth filter (primary virtue is to have an extremely flat pass band) a) Determine the transfer function H(s)=V out (s)/V in (s). b) Plot the magnitude Bode plot, using frequency in Hz rather than rad/s. c) Determine the cutoff frequency and attenuation for the filter (in dB/decade) V in R 1 R 2 R 3 R 4 R C C 3 C 1 C 2 C 4 V out R=R 1 =R 2 =R 3 =R 4 =1k Ω C=16 nF, C 1 =19 nF, C 2 =13 nF, C 3 =51 nF, C 4 =4.9 nF,...
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- Fall '08
- Low-pass filter, Butterworth Filter, Cutoff frequency, Magnitude Bode plot, dB/decade