Version 4
SHEET 1 1252 1188
WIRE 1136 176 1024 176
WIRE 1136 304 1136 256
WIRE 1248 304 1136 304
WIRE 1024 368 1024 176
WIRE 1104 368 1024 368
WIRE 1168 368 1104 368
WIRE 1104 448 1024 448
WIRE 1168 448 1104 448
WIRE 592 480 592 320
WIRE 1024 544 1024 448
WIRE 560 592 512 592
WIRE 944 624 912 624
WIRE 976 624 944 624
WIRE 400 656 304 656
WIRE 560 656 480 656
WIRE 1024 688 1024 640
WIRE 1024 688 944 688
WIRE 304 720 304 656
WIRE 512 736 512 592
WIRE 1024 752 1024 688
WIRE 1024 864 1024 832
WIRE 1024 864 880 864
WIRE 1248 880 1248 304
WIRE 1248 880 1088 880
WIRE 1024 896 1024 864
WIRE 512 912 512 816
WIRE 544 912 512 912
WIRE 624 912 544 912
WIRE 880 912 880 864
WIRE 880 912 704 912
WIRE 544 960 544 912
WIRE 1024 1008 1024 976
WIRE 1024 1008 1008 1008
WIRE 1136 1008 1136 992
WIRE 544 1056 544 1040
WIRE 1024 1056 1024 1008
WIRE 1024 1056 544 1056
WIRE 1024 1088 1024 1056
WIRE 1088 1088 1088 880
WIRE 1088 1088 1024 1088
WIRE 1136 1088 1088 1088
FLAG 32 32 vcc
FLAG 32 112 0
FLAG -80 0 0
FLAG -80 80 vee
FLAG 592 320 vcc
FLAG 592 768 vee
FLAG 304 800 0
FLAG 1136 992 0
SYMBOL voltage 32 16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage -80 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL nmos 976 544 R0
SYMATTR InstName M1
SYMATTR Value IRLML2803
SYMBOL res 1040 848 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R7
SYMATTR Value 100
SYMBOL res 1040 992 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R8
SYMATTR Value 1000
SYMBOL voltage 1136 160 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 15
SYMBOL Opamps\\LTC2057 720 624 R0
SYMATTR InstName U1
SYMBOL res 928 608 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 100
SYMBOL cap 928 624 R0
SYMATTR InstName C1
SYMATTR Value 1000n
SYMBOL res 1088 352 R0
SYMATTR InstName R6
SYMATTR Value 100
SYMBOL res 496 640 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1k
SYMBOL voltage 304 704 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 7.15
SYMBOL res 720 896 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 10.16085k
SYMBOL res 528 944 R0
SYMATTR InstName R2
SYMATTR Value 28k
SYMBOL res 496 720 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 1120 992 R0
SYMATTR InstName R3
SYMATTR Value 1
TEXT -2 488 Left 2 !.tran 0 1 0