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:.include ~/bin/spice.lib .param am=3e-1 f=10700k df=1k vin In Inn1 ac 1 sin(0 {am} {f}) vin_m1 Inn1 Inn2 ac 1 sin(0 {am/3} {f+df}) vin_m2 Inn2 0 ac 1 sin(0 {am/3} {f-df}) R11 d11 0 10k C11 d11 0 0.01u D11 in d11 1n4148 X11 d11 x11n out11 opamp R12 x11n out11 1Meg R13 x11n 0 33k ****** R1 d1 outint 10k C1 d1 0 0.01u D1 in d1 1n4148 X1 d1 x1n out12 opamp R2 x1n out12 1Meg R3 x1n 0 33k X2 inint 0 outint opamp Rrc out12 inint 1Meg Crc outint inint .05u .control op set gnuplot_terminal=png/quit run tran 1e-6 20e-3 gnuplot tran_1 v(in), v(d11), v(out11) gnuplot tran_2 v(in), v(d1), v(out12) gnuplot tran_3 v(in), 0, v(outint), v(d1) gnuplot tran_4 v(out11), v(out12) quit .endc .end
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