AMP_ACTIVE_LOAD.CIR * VS 1 0 AC 1 sin(0 0.1Vp 1kHz) VCC 100 0 +15V VDD 101 0 -15V * AMPLIFIER WITH ACTIVE LOAD *** * GAIN RESISTOR R2 5 2 1000 R1 2 0 10 * DIFFERENTIAL STAGE RIN 1 2 1E12 GDIFF 0 3 1 2 0.02 * GAIN WITH ACTIVE LOAD *C 3 4 500PF Q3 4 3 101 QNPN * * CURRENT SOURCE D1 100 7 DNOM D2 7 6 DNOM RB4 6 0 5K Q4 4 6 8 QMPSA56 RE4 8 100 650 * BUFFER EBUFF 5 0 4 0 1 * AMPLIFIER WITH RESISTOR LOAD *** * GAIN RESISTOR R_2 15 12 1000 R_1 12 0 10 * DIFFERENTIAL STAGE R_IN 1 12 1E12 G_DIFF 0 13 1 12 0.02 * GAIN WITH RESISTOR LOAD *C 13 14 500PF Q_3 14 13 101 QNPN * R_C3 100 14 15000 * BUFFER E_BUFF 15 0 14 0 1 * MODELS .MODEL QNPN NPN( Bf=100 ) .MODEL DNOM D( ) .MODEL Qmpsa56 pnp +IS=9.62586e-12 BF=246.647 NF=1.19008 VAF=19.1507 +IKF=0.332189 ISE=1.74278e-11 NE=1.95504 BR=0.1 +NR=1.49124 VAR=3.92539 IKR=4.71144 ISC=3.90265e-13 +NC=3.98982 RB=0.772559 IRB=0.184627 RBM=0.365314 +RE=0.00202964 RC=0.26419 XTB=0.467199 XTI=1 +EG=0.851752 CJE=4.05433e-11 VJE=0.4 MJE=0.748564 +TF=7.64992e-10 XTF=4.80943 VTF=12.6194 ITF=0.441135 +CJC=4.21506e-11 VJC=0.4 MJC=0.352218 XCJC=0.899996 +FC=0.180025 CJS=0 VJS=0.75 MJS=0.5 +TR=1e-07 PTF=0 KF=0 AF=1 * ANALYSIS .AC DEC 5 10 100k .PROBE .END