OPINT.CIR - OPAMP INTEGRATOR * * CONTROL VOLTAGE FOR S1 VRESET 4 0 PULSE(0V 5V 0 0.1US 0.1US 100US 110US) R4 4 0 1MEG * * INPUT VOLTAGE VS 1 0 DC -1 * R1 1 2 10K C1 2 3 1000PF S1 2 3 4 0 SRES XOP 0 2 3 OPAMP1 * .MODEL SRES VSWITCH(VON=0 VOFF=5 RON=100 ROFF=10MEG) * * 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 = 10MHZ = DCGAIN x POLE1 * DC GAIN (100K) AND POLE 1 (100HZ) EGAIN 3 0 1 2 100K RP1 3 4 1K CP1 4 0 1.5915UF * OUTPUT BUFFER AND RESISTANCE EOUT 5 0 4 0 1 ROUT 5 6 10 .ENDS * * ANALYSIS .TRAN 1US 220US * VIEW RESULTS .PLOT TRAN V(1) V(3) *.PRINT TRAN V(1) V(3) .PROBE .END