Version 4
SHEET 1 2004 1048
WIRE 816 -160 720 -160
WIRE 720 -144 720 -160
WIRE 592 -48 512 -48
WIRE 720 -32 720 -64
WIRE 720 -32 672 -32
WIRE 752 -32 720 -32
WIRE 592 -16 560 -16
WIRE 1184 0 1184 -64
WIRE 1312 0 1312 -64
WIRE 992 16 800 16
WIRE 1120 16 1072 16
WIRE 448 48 448 -16
WIRE 560 64 560 -16
WIRE 608 64 608 16
WIRE 608 64 560 64
WIRE 608 80 608 64
WIRE 512 144 512 -48
WIRE 512 144 448 144
WIRE 576 144 512 144
WIRE 704 144 656 144
WIRE 800 144 800 16
WIRE 800 144 784 144
WIRE 848 144 800 144
WIRE 1120 160 1120 16
WIRE 1152 160 1120 160
WIRE 1280 160 1232 160
WIRE 1328 160 1280 160
WIRE 1120 176 1120 160
WIRE 448 192 448 144
WIRE 592 208 592 192
WIRE 848 208 768 208
WIRE 448 224 448 192
WIRE 640 224 640 192
WIRE 1168 224 1168 208
WIRE 1216 240 1216 208
WIRE 448 352 448 304
WIRE 768 352 768 288
WIRE 1088 400 752 400
WIRE 752 544 752 400
WIRE 816 544 752 544
WIRE 1088 576 1088 400
WIRE 1088 576 1072 576
WIRE 1152 576 1088 576
WIRE 1152 592 1152 576
WIRE 1168 592 1152 592
WIRE 1328 592 1328 160
WIRE 1328 592 1248 592
WIRE 512 608 512 144
WIRE 576 608 512 608
WIRE 816 608 656 608
WIRE 1232 688 1232 640
WIRE 640 704 640 656
WIRE 592 736 592 656
WIRE 1184 736 1184 640
FLAG 448 352 0
FLAG 1184 0 0
FLAG 1312 0 0
FLAG 1184 -144 V+
FLAG 448 192 Input
FLAG 1312 -144 V-
FLAG 448 -96 Vdigital
FLAG 624 16 V-
FLAG 624 -80 V+
FLAG 608 80 0
FLAG 816 -160 Vdigital
FLAG 592 208 0
FLAG 752 -32 range_switch
FLAG 640 224 range_switch
FLAG 592 736 0
FLAG 640 704 range_switch
FLAG 848 720 V-
FLAG 848 432 V+
FLAG 1168 224 0
FLAG 1216 240 range_switch
FLAG 1184 736 0
FLAG 1232 688 range_switch
FLAG 1280 160 output
FLAG 768 352 0
FLAG 880 32 V+
FLAG 880 320 V-
FLAG 448 48 0
SYMBOL voltage 448 208 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -69 200 Left 2
SYMATTR Value SINE(0 10 1)
SYMATTR InstName V1
SYMBOL voltage 1184 -160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage 1312 -160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value -15
SYMBOL Comparators\\LT1011 624 -32 R0
SYMATTR InstName U3
SYMBOL sw 560 144 R270
WINDOW 3 53 73 VRight 2
SYMATTR Value OSW
SYMATTR InstName S2
SYMBOL sw 560 608 R270
WINDOW 3 -29 99 VRight 2
SYMATTR Value CSW
SYMATTR InstName S3
SYMBOL sw 1136 160 R270
WINDOW 3 53 73 VRight 2
SYMATTR Value OSW
SYMATTR InstName S1
SYMBOL sw 1152 592 R270
WINDOW 3 -29 99 VRight 2
SYMATTR Value CSW
SYMATTR InstName S4
SYMBOL Opamps\\LTC2057 976 576 R0
SYMATTR InstName U4
SYMBOL Opamps\\LTC2057 1008 176 R0
SYMATTR InstName U2
SYMBOL res 800 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 10K
SYMBOL res 784 304 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 1K
SYMBOL res 976 32 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 704 -160 R0
SYMATTR InstName R4
SYMATTR Value 1K
SYMBOL voltage 448 -112 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 5
TEXT 1016 -96 Left 2 !.tran 1
TEXT 672 792 Left 2 !.model OSW SW(Ron=30 Roff=100G Vt=1 Vh=0)
TEXT 672 832 Left 2 !.model CSW SW(Ron=100G Roff=30 Vt=1 Vh=0)