Design cascaded active band-pass filter for the Sallen-Key to implement a second- order Bessel response with a lower critical frequency of approximately 4 kHz and the upper critical frequency is 8 kHz, consider equal values for Sallen-Key filter for the 1st stage where RA1 = RB1 = R = 1K0 and R2 = 40K0, and 2nd stage R$2 = RB2 = 1K0 and R4 = 4KQ. a. Calculate the centre frequency b. Calculate the bandwidth C. The quality factors from the table for the 1st stage and 2nd stage d. Calculate the damping factor for the 1st stage and 2nd stage e. Determine the value of C for the 1st stage where C = CA1 = CB1 f. Determine the value of C for the 2nd stage where C = CA2 = CB2 g. Determine the value of R1 and R3 TH CA HH RA W w RE w- Two pole bigh-pass Two pole low FILTER ORDER a 2 3 4 Table 2. Bessel Filter Table Stage 1 Stage 2 Stage 3 Stage 4 FSF Q FSF FSF Q FSF 1.2736 0.5773 1.4524 0.6910 1.3270 1.4192 0.5219 1.5912 0.8055 1,5611 0.5635 1.7607 0.9165 1.5069 1.6060 0.5103 1.6913 0.6112 1.9071 1.0234 1.7174 0.5324 1.8235 0.6608 2.0507 1.1262 1.6853 1.7837 0.5060 2 1953 1.2258 1.9591 0.7109 1.8376 0.5596 1.8794 0.5197 1.9488 0.5894 20815 0.7606 2.3235 1.3220 1.9490 0.5040 1.9870 0.5380 20680 0.6200 2.2110 0.8100 5 6 7 8 9 10