Version 4
SHEET 1 880 680
WIRE -80 -32 -224 -32
WIRE 352 -32 -80 -32
WIRE -80 0 -80 -32
WIRE 352 0 352 -32
WIRE -32 112 -128 112
WIRE 48 112 -32 112
WIRE 352 128 352 80
WIRE 48 176 48 112
WIRE -80 192 -80 80
WIRE 16 192 -80 192
WIRE 144 208 80 208
WIRE 192 208 144 208
WIRE 304 208 272 208
WIRE -32 224 -32 112
WIRE 16 224 -32 224
WIRE 144 224 144 208
WIRE 48 256 48 240
WIRE -80 304 -80 192
WIRE 144 304 144 288
WIRE 144 304 -80 304
WIRE 192 304 144 304
WIRE 352 304 352 224
WIRE 352 304 272 304
WIRE -224 320 -224 -32
WIRE -224 336 -224 320
WIRE -128 336 -128 112
WIRE 352 336 352 304
WIRE -224 448 -224 416
WIRE -128 448 -128 416
WIRE 352 448 352 416
FLAG 352 448 0
FLAG 48 256 0
FLAG -224 448 0
FLAG -128 448 0
FLAG -224 320 1
SYMBOL Opamps\\LT1677 48 144 R0
SYMATTR InstName U1
SYMBOL nmos 304 128 R0
SYMATTR InstName M1
SYMATTR Value IRL530NS_L
SYMBOL res -96 -16 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL res 288 288 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 24k
SYMBOL res 336 -16 R0
SYMATTR InstName R3
SYMATTR Value 56
SYMBOL res 336 320 R0
SYMATTR InstName R4
SYMATTR Value 39.2
SYMBOL voltage -224 320 R0
WINDOW 123 24 116 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 36
SYMBOL voltage -128 320 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 18
SYMBOL cap 128 224 R0
SYMATTR InstName C1
SYMATTR Value 2.2n
SYMBOL res 288 192 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1k
TEXT -48 384 Left 2 !.dc V1 36 57 0.1