* 24 dB notch filter at ~500 Hz * BO 6 80 25 430 540 bode plot on node 6, 80 lines, 25 db scale, 430 Hz to 540 Hz VS 1 0 1. 0 voltage source of 1 volt at 0 degrees connected to node 1 and ground RC 1 2 0 .022E-06 .022 uf capacitor from node 1 to node 2 R 2 3 7500 0 7500 ohm resistor from node 2 to node 3 R 1 4 15000 0 15000 ohm resistor from node 1 to node 4 RC 3 4 0 .044E-06 .044 uf cap from node 3 to node 4 RC 2 5 0 .022E-06 .022 uf cap from node 2 to node 5 R 4 5 15000 0 15000 ohm resistor from node 4 to node 5 R 3 0 1000 0 1000 ohm resistor from node 3 to ground R 3 6 27 0 27 ohm resistor from node 3 to node 6 OA 5 6 6 100000. operational amplifier, nodes: + input, - input, output, and 100000 voltage gain