Version 4
SHEET 1 880 884
WIRE 80 -112 48 -112
WIRE 624 -112 160 -112
WIRE 48 -16 48 -112
WIRE 80 -16 48 -16
WIRE 192 -16 160 -16
WIRE 224 -16 192 -16
WIRE 336 -16 304 -16
WIRE 368 -16 336 -16
WIRE 480 -16 448 -16
WIRE 512 -16 480 -16
WIRE 624 -16 624 -112
WIRE 624 -16 592 -16
WIRE 656 -16 624 -16
WIRE 688 -16 656 -16
WIRE 656 32 656 -16
WIRE 112 80 112 64
WIRE 400 80 400 64
WIRE -64 96 -128 96
WIRE 48 96 48 -16
WIRE 48 96 16 96
WIRE 80 96 48 96
WIRE 336 96 336 -16
WIRE 368 96 336 96
WIRE 192 112 192 -16
WIRE 192 112 144 112
WIRE 480 112 480 -16
WIRE 480 112 432 112
WIRE -128 128 -128 96
WIRE 80 128 48 128
WIRE 368 128 336 128
WIRE 48 160 48 128
WIRE 336 160 336 128
WIRE 400 160 400 144
WIRE 656 160 656 112
WIRE 112 176 112 144
WIRE -128 240 -128 208
WIRE 176 272 176 256
WIRE 336 272 336 256
WIRE 176 368 176 352
WIRE 336 368 336 352
WIRE 64 512 32 512
WIRE 608 512 144 512
WIRE 32 608 32 512
WIRE 64 608 32 608
WIRE 176 608 144 608
WIRE 208 608 176 608
WIRE 320 608 288 608
WIRE 352 608 320 608
WIRE 464 608 432 608
WIRE 496 608 464 608
WIRE 608 608 608 512
WIRE 608 608 576 608
WIRE 640 608 608 608
WIRE 672 608 640 608
WIRE 640 656 640 608
WIRE 96 704 96 688
WIRE 384 704 384 688
WIRE -80 720 -128 720
WIRE 32 720 32 608
WIRE 32 720 0 720
WIRE 64 720 32 720
WIRE 320 720 320 608
WIRE 352 720 320 720
WIRE 176 736 176 608
WIRE 176 736 128 736
WIRE 464 736 464 608
WIRE 464 736 416 736
WIRE 64 752 32 752
WIRE 352 752 320 752
WIRE 32 784 32 752
WIRE 320 784 320 752
WIRE 384 784 384 768
WIRE 640 784 640 736
WIRE 96 800 96 768
FLAG 336 160 0
FLAG 48 160 0
FLAG 656 160 0
FLAG -128 240 0
FLAG 112 64 +V
FLAG 400 64 +V
FLAG 400 160 -V
FLAG 112 176 -V
FLAG 688 -16 out
FLAG 336 368 0
FLAG 176 368 0
FLAG 176 256 +V
FLAG 336 256 -V
FLAG 320 784 0
FLAG 32 784 0
FLAG 640 784 0
FLAG 96 688 +V
FLAG 384 688 +V
FLAG 384 784 -V
FLAG 96 800 -V
FLAG 672 608 out2
FLAG -128 96 in
FLAG -128 720 in
SYMBOL Opamps\\UniversalOpamp2 112 112 R0
SYMATTR InstName U1
SYMBOL Opamps\\UniversalOpamp2 400 112 R0
SYMATTR InstName U2
SYMBOL Misc\\EuropeanResistor -80 112 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 64 0 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 208 0 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 352 0 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 496 0 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 64 -96 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 9k
SYMBOL Misc\\EuropeanResistor 640 16 R0
SYMATTR InstName RL
SYMATTR Value {RL}
SYMBOL voltage -128 112 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 1
SYMATTR Value2 AC 1
SYMBOL voltage 176 256 R0
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 336 256 R0
SYMATTR InstName V3
SYMATTR Value -15
SYMBOL Opamps\\UniversalOpamp2 96 736 R0
SYMATTR InstName U3
SYMBOL Opamps\\UniversalOpamp2 384 736 R0
SYMATTR InstName U4
SYMBOL Misc\\EuropeanResistor -96 736 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1_
SYMATTR Value 11k
SYMBOL Misc\\EuropeanResistor 48 624 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2_
SYMATTR Value 11k
SYMBOL Misc\\EuropeanResistor 192 624 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3_
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 336 624 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R4_
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 480 624 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R5_
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 48 528 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6_
SYMATTR Value 10k
SYMBOL Misc\\EuropeanResistor 624 640 R0
SYMATTR InstName RL_
SYMATTR Value {RL}
TEXT -112 -312 Left 2 !.op
TEXT -112 -280 Left 2 !.step param RL 0.1 1k 10
TEXT 40 -176 Left 2 ;R6 = R2*R4/R3 -R5
TEXT 24 448 Left 2 ;R6 = R2*R4/R3 -R5
TEXT 336 -304 Left 2 ;Current Sources\n1mA/Volt\nAll resistors +/-0.1%
TEXT -144 608 Left 2 ;11k=10k+1k