ELEC2320 Lecture Notes - Lecture 10: Bessel Filter, Chebyshev Filter, Passband

• School: University of Newcastle
• Department: Electrical Engineering
• Course: ELEC2320
• Professor: Kaushik Mahata

Document Summary

Frf of high-quality filters are based on some low pass prototypes: prototypes have been tested over time. Elementary filters are based on first order prototype. Popular prototypes include: butterworth filter, the amplitude of the wave is important, chebyshev filter, bessel filter, reduces distortion, elliptic filter. Example 2: butterworth lpf prototype of order n. Low pass filter design from a given prototype glpf(s) Example 5: design from order n butterworth prototype. For an order n butterworth frf one can show that: First order prototype is a butterworth filter with n = 1. First order filters offer slow roll-off, and gain varies quite a bit in the passband. Performance improves with increasing n. for large n the magnitude response is near ideal. Butterworth lpf gain plot for k = l2 = 1. Butterworth lpf bode plot for k = 1. The benefit of increasing order n for an lpf. How to build a n butterworth lpf circuit.