Version 4
SHEET 1 1148 680
WIRE 752 -144 688 -144
WIRE 864 -144 816 -144
WIRE 688 -48 688 -144
WIRE 736 -48 688 -48
WIRE 864 -48 864 -144
WIRE 864 -48 816 -48
WIRE 768 80 768 64
WIRE 144 96 32 96
WIRE 272 96 224 96
WIRE 304 96 272 96
WIRE 336 96 304 96
WIRE 448 96 416 96
WIRE 480 96 448 96
WIRE 544 96 480 96
WIRE 656 96 624 96
WIRE 688 96 688 -48
WIRE 688 96 656 96
WIRE 736 96 688 96
WIRE 864 112 864 -48
WIRE 864 112 800 112
WIRE 896 112 864 112
WIRE 32 128 32 96
WIRE 480 128 480 96
WIRE 736 128 688 128
WIRE 768 160 768 144
WIRE 384 192 384 176
WIRE 272 208 272 96
WIRE 352 208 272 208
WIRE 448 224 416 224
WIRE 480 224 480 192
WIRE 480 224 448 224
WIRE 32 240 32 208
WIRE 352 240 320 240
WIRE 480 256 480 224
WIRE 320 272 320 240
WIRE 384 272 384 256
WIRE 272 352 272 208
WIRE 336 352 272 352
WIRE 448 352 416 352
WIRE 480 352 480 320
WIRE 480 352 448 352
WIRE 688 352 688 128
WIRE 688 352 480 352
WIRE 32 464 32 432
WIRE 160 464 160 432
WIRE 32 576 32 544
WIRE 160 576 160 544
FLAG 32 240 0
FLAG 320 272 0
FLAG 768 64 +V
FLAG 384 176 +V
FLAG 768 160 -V
FLAG 384 272 -V
FLAG 896 112 out
FLAG 32 96 in
FLAG 448 96 2
FLAG 448 352 3
FLAG 304 96 1
FLAG 656 96 4
FLAG 32 576 0
FLAG 32 432 +V
FLAG 160 576 0
FLAG 160 432 -V
FLAG 448 224 o1
SYMBOL voltage 32 112 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(0 2 1k)
SYMBOL Misc\\EuropeanResistor 240 80 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R1
SYMATTR Value {0.9*R}
SYMBOL Misc\\EuropeanResistor 432 80 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value {R}
SYMBOL Misc\\EuropeanResistor 432 336 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R3
SYMATTR Value {R}
SYMBOL Misc\\EuropeanResistor 640 80 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R4
SYMATTR Value {R}
SYMBOL Misc\\EuropeanResistor 832 -64 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R5
SYMATTR Value {R}
SYMBOL cap 816 -160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1f
SYMBOL Opamps\\UniversalOpamp2 768 112 R0
SYMATTR InstName U1
SYMBOL Opamps\\UniversalOpamp2 384 224 R0
SYMATTR InstName U2
SYMBOL diode 464 256 R0
SYMATTR InstName D1
SYMBOL diode 464 128 R0
SYMATTR InstName D2
SYMBOL voltage 32 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL voltage 160 448 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value -5
TEXT 32 -72 Left 2 !.param R=10k
TEXT 32 -152 Left 2 !.tran 0 10m 8m 10u
TEXT 32 -120 Left 2 !.options plotwinsize=0
TEXT 32 -336 Left 2 ;Uin > 0\nUout = -Uin*(R2/R1)*(-R5/R4) = -Uin/0.9 *-1 = Uin/0,9\n \nUin <0\nUout = -Uin*(R3||(R2+R4))/(R1) * (1+R5/(R2+R4)) = -Uin*(2/3)/(0,9) * (1+1/2) = -Uin/0,9