Version 4 SHEET 1 1324 816 WIRE 624 -688 624 -736 WIRE 224 -656 224 -720 WIRE 352 -656 352 -720 WIRE 784 -528 784 -576 WIRE 224 -512 224 -576 WIRE 352 -512 352 -576 WIRE 624 -480 624 -608 WIRE 624 -480 512 -480 WIRE 720 -480 624 -480 WIRE 624 -432 624 -480 WIRE 512 -384 512 -480 WIRE 560 -384 512 -384 WIRE 624 -288 624 -336 WIRE 624 -288 512 -288 WIRE 784 -288 784 -432 WIRE 944 -288 784 -288 WIRE 1024 -288 944 -288 WIRE 624 -256 624 -288 WIRE 944 -256 944 -288 WIRE 512 -208 512 -288 WIRE 560 -208 512 -208 WIRE 944 -144 944 -176 WIRE 784 -112 784 -288 WIRE 464 -64 432 -64 WIRE 624 -64 624 -160 WIRE 624 -64 464 -64 WIRE 720 -64 624 -64 WIRE 432 0 432 -64 WIRE 784 64 784 -16 WIRE 432 144 432 80 FLAG 224 -512 0 FLAG 352 -512 0 FLAG 224 -720 VCC FLAG 352 -720 VCC- FLAG 784 64 VCC- FLAG 784 -576 VCC FLAG 432 144 0 FLAG 944 -144 0 FLAG 1024 -288 OUT FLAG 464 -64 IN FLAG 624 -736 VCC SYMBOL voltage 224 -672 R0 SYMATTR InstName Vps+ SYMATTR Value 23V SYMBOL voltage 352 -672 R0 SYMATTR InstName Vps- SYMATTR Value -23V SYMBOL npn 720 -528 R0 SYMATTR InstName Q1 SYMATTR Value NA51 SYMBOL voltage 432 -16 R0 WINDOW 0 -68 19 Left 2 WINDOW 3 -246 114 Left 2 SYMATTR InstName Vin SYMATTR Value SINE(0V 17.7V 1000) SYMBOL res 928 -272 R0 SYMATTR InstName RL SYMATTR Value 100 SYMBOL pnp 720 -16 M180 SYMATTR InstName Q2 SYMATTR Value NA52 SYMBOL current 624 -688 R0 SYMATTR InstName Ibias SYMATTR Value 3mA SYMBOL npn 560 -432 R0 SYMATTR InstName Q3 SYMATTR Value 2N2222 SYMBOL npn 560 -256 R0 SYMATTR InstName Q4 SYMATTR Value 2N2222 TEXT 0 272 Left 2 ;.OP TEXT -56 224 Left 2 ;Spice Directive TEXT -104 312 Left 2 ;.DC Vin -25V +25V 100mV TEXT -104 360 Left 2 !.TRAN 10us 3ms 0ms 10us TEXT 416 272 Left 2 !.model NA51 NPN (Is=10f Xti=3 Eg=1.11 Vaf=100 Bf=100 Ise=0 Ne=1.5 Ikf=0\n+ Nk=.5 Xtb=1.5 Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=76.97p Mjc=.2072\n+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n Tf=1n Itf=1 Xtf=0\n+ Vtf=10)\n.model NA52 PNP (Is=10f Xti=3 Eg=1.11 Vaf=100 Bf=100 Ise=0 Ne=1.5 Ikf=0\n+ Nk=.5 Xtb=1.5 Br=1 Isc=0 Nc=2 Ikr=0 Rc=0 Cjc=112.6p Mjc=.1875\n+ Vjc=.75 Fc=.5 Cje=5p Mje=.3333 Vje=.75 Tr=10n Tf=1n Itf=1 Xtf=0\n+ Vtf=10) TEXT 728 216 Left 2 ;BJT Transistor Models TEXT -56 400 Left 2 !.FOUR 1kHz V(OUT)