Version 4 SHEET 1 1236 2424 WIRE 160 -224 -80 -224 WIRE 160 -176 160 -224 WIRE 48 -112 -16 -112 WIRE 48 -80 48 -112 WIRE 720 -16 480 -16 WIRE 848 -16 800 -16 WIRE -80 128 -80 -224 WIRE 48 160 48 0 WIRE 224 160 48 160 WIRE 528 160 304 160 WIRE 560 160 528 160 WIRE 848 176 848 -16 WIRE 848 176 624 176 WIRE 1216 176 848 176 WIRE 160 192 160 -96 WIRE 320 192 160 192 WIRE 480 192 480 -16 WIRE 480 192 400 192 WIRE 560 192 480 192 WIRE -80 240 -80 208 WIRE 48 256 48 160 WIRE 160 256 160 192 WIRE 1216 256 1216 176 WIRE 528 272 528 160 WIRE -16 400 -16 -112 WIRE 48 400 48 336 WIRE 48 400 -16 400 WIRE 160 400 160 336 WIRE 160 400 48 400 WIRE 160 448 160 400 WIRE 528 448 528 352 WIRE 1216 448 1216 336 FLAG -80 240 0 FLAG 160 448 0 FLAG 528 448 0 FLAG 1216 448 0 FLAG -80 -224 P5V FLAG 592 208 P5V FLAG 592 144 0 SYMBOL voltage -80 112 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL res 416 176 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 22k SYMBOL res 816 -32 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 130k SYMBOL res 320 144 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 22k SYMBOL res 544 368 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R4 SYMATTR Value 130k SYMBOL res 176 352 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R5 SYMATTR Value 2k2 SYMBOL res 176 -80 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R6 SYMATTR Value 3k6 SYMBOL res 64 352 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R7 SYMATTR Value 220 SYMBOL res 1232 352 R180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R8 SYMATTR Value 1k SYMBOL Opamps\\opamp2 592 240 M180 SYMATTR InstName U2 SYMATTR Value LM324 SYMBOL current 48 -80 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value 8.6 TEXT -896 -200 Left 2 !.SUBCKT LM324 1 2 3 4 5\n *\n C1 11 12 5.544E-12\n C2 6 7 20.00E-12\n DC 5 53 DX\n DE 54 5 DX\n DLP 90 91 DX\n DLN 92 90 DX\n DP 4 3 DX\n EGND 99 0 POLY(2) (3,0) (4,0) 0 .5 .5\n FB 7 99 POLY(5) VB VC VE VLP VLN 0 15.91E6 -20E6 20E6 20E6 -20E6\n GA 6 0 11 12 125.7E-6\n GCM 0 6 10 99 7.067E-9\n IEE 3 10 DC 10.04E-6\n HLIM 90 0 VLIM 1K\n Q1 11 2 13 QX\n Q2 12 1 14 QX\n R2 6 9 100.0E3\n RC1 4 11 7.957E3\n RC2 4 12 7.957E3\n RE1 13 10 2.773E3\n RE2 14 10 2.773E3\n REE 10 99 19.92E6\n RO1 8 5 50\n RO2 7 99 50\n RP 3 4 30.31E3\n VB 9 0 DC 0\n VC 3 53 DC 2.100\n VE 54 4 DC .6\n VLIM 7 8 DC 0\n VLP 91 0 DC 40\n VLN 0 92 DC 40\n .MODEL DX D(IS=800.0E-18)\n \n.MODEL QX PNP(IS=800.0E-18 BF=250)\n \n.ENDS TEXT -72 512 Left 2 !.dc I1 4m 20m 100u