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electronics 3
Second order -order stage First order stage + усс C2 17 + VCC R1 ww 22K + R3 w KIFET OL R4 w 20K CI BIFET vo C3+ - VEE R2 - VEE 1 R5 Figure 2: Third-Order Active Filter A third-order active filter shown in Figure 2 is to attenuate all signals above 9 kHz by a minimum of 21 dB. The circuit is to be designed using BIFET op-amps and is to have a Butterworth response. For the circuit of Figure 2, determine the third-order fall-off rate (dB/octave): 2 For the circuit of Figure 2, determine the cut-off frequency, fc (kHz): 2 For the first-order stage of Figure 2, determine the cut-off frequency, fc1 (kHz): 1 For the circuit of Figure 2, determine C1 (PF): 2 What is the E24 standard value of Ci as determined in the preceding question (PF): 1 For the circuit of Figure 2, determine R2 (kilo-Ohms): 1 For the second-order stage of Figure 2, determine the cut-off frequency, fc2 (kHz): 1 For the circuit of Figure 2, determine C3 (PF): 2 What is the E24 standard value of C3 as determined in the preceding question (PF): 1 For the circuit of Figure 2, determine C2 (PF): 2 Page 6 of 8