* op_bandcut_boost_L_sim.cir * VS 1 0 AC 1 SIN(0V 1V 800Hz) * * POTENTIOMETER POSITION (1=CCW, 50=MID, 99=CW) .PARAM RPOS=1 * R1 1 2 10K R2A 2 3 { RPOS/100*20K } R2B 3 4 { (1-RPOS/100)*20K } R4 4 5 10k * OPAMP XOP1 2 4 5 OPAMP1 * C1 3 6 120NF * * SIMULATED LR CS 6 7 1NF RS 7 0 300K R3 6 8 1100 XOP2 7 8 8 OPAMP1 * * OPAMP MACRO MODEL, SINGLE-POLE * connections: non-inverting input * | inverting input * | | output * | | | .SUBCKT OPAMP1 1 2 6 * INPUT IMPEDANCE RIN 1 2 10MEG * GAIN BW PRODUCT = 1MHZ * DC GAIN (100K) AND POLE 1 (10HZ) EGAIN 3 0 1 2 100K RP1 3 4 1K CP1 4 0 15.915UF * OUTPUT BUFFER AND RESISTANCE EBUFFER 5 0 4 0 1 ROUT 5 6 10 .ENDS * * ANALYSIS ************************************* *.TRAN 1us 100us .ac dec 40 10 100k .PROBE .END