AUDIO_SMALL_SIGNAL_MODEL.CIR * VS 1 0 AC 1 * FEEDBACK RESISTORS R1 2 0 1K R2 5 2 9K * DIFFERENTIAL STAGE RIN 1 2 1E12 GDIFF 3 0 1 2 0.02 * MILLER INTEGRATOR RIN3 3 0 1E12 C 3 4 500PF EGAIN 4 0 3 0 -1000 * BUFFER EBUFF 5 0 4 0 1 * * ANALYSIS .AC DEC 5 10 1000MEG .PROBE .END