Band Pass Filter State-Variable V1 1 0 0 AC 1 RG 1 2 50k RQ 2 0 50k X1 2 3 outHP OPAMP1 R2 3 outHP 50k RF1 outHP 4 21.2k X2 0 4 outBP OPAMP1 C1 4 outBP 1000p R4 2 outBP 50k RF2 outBP 5 11.9k X3 0 5 outLP OPAMP1 C2 5 outLP 1000p R1 3 outLP 50k .SUBCKT OPAMP1 1 2 3 R1 1 2 10Meg E1 4 0 1 2 100k E2 5 0 6 0 1 R2 4 6 1k C1 6 0 1.5915u R3 5 3 50 .ENDS OPAMP1 .AC DEC 100 100 1Meg *destroy all *#set units=degrees *#run *#PLOT VDB(outBP) VDB(outHP) VDB(outLP) *#PLOT VP(outBP) VP(outHP) VP(outLP) .END