DIFF_AMP_W_MIRROR.CIR - DIFFERENTIAL AMP WITH CURRENT MIRROR * POWER SUPPLIES VCC 100 0 DC +15V VEE 101 0 DC -15V * * INPUT VOLTAGE VS1 2 0 AC 1 SIN(0 0.01V 1KHZ) VBIAS1 3 0 DC 0.00V * * DIFF AMP RE1 100 8 14.3K Q1 4 2 8 QPNP Q2 5 3 8 QPNP * CURRENT MIRROR Q8 4 5 101 QNPN Q9 5 5 101 QNPN * * TRANSIMPEDANCE AMP R10 100 6 10K D10 6 101 D1N4148 RF1 4 7 1K EOPAMP1 7 0 4 6 1000000 * * * DEVICES .model QNPN NPN(BF=100) .model QPNP PNP(BF=100) .model D1N4148 D(Is=0.1p Rs=16 CJO=2p Tt=12n Bv=100 Ibv=0.1p) * CHECK DISTORTION WITH FOURIER SERIES ANALYSIS .FOUR 1KHZ V(7) * .TRAN 50US 1MS .PROBE .END