Version 4
SHEET 1 880 680
WIRE 144 -32 112 -32
WIRE 240 -32 144 -32
WIRE 448 -32 240 -32
WIRE 144 0 144 -32
WIRE 240 0 240 -32
WIRE 144 80 144 64
WIRE 240 80 240 64
WIRE 240 80 144 80
WIRE 32 128 -560 128
WIRE 240 128 240 80
WIRE 112 144 112 -32
WIRE 80 160 48 160
WIRE 160 176 144 176
WIRE 176 176 160 176
WIRE -304 192 -384 192
WIRE -176 192 -224 192
WIRE -128 192 -176 192
WIRE -16 192 -48 192
WIRE 16 192 -16 192
WIRE 32 192 32 128
WIRE 80 192 32 192
WIRE 176 208 176 176
WIRE 192 208 176 208
WIRE 448 208 448 -32
WIRE -560 224 -560 128
WIRE -384 224 -384 192
WIRE -176 240 -176 192
WIRE -16 240 -16 192
WIRE 48 240 48 160
WIRE 160 240 48 240
WIRE 240 240 240 224
WIRE 240 240 160 240
WIRE -560 336 -560 304
WIRE -384 336 -384 304
WIRE -384 336 -560 336
WIRE -176 336 -176 304
WIRE -176 336 -384 336
WIRE -16 336 -16 304
WIRE -16 336 -176 336
WIRE 48 336 -16 336
WIRE 112 336 112 208
WIRE 112 336 48 336
WIRE 240 336 240 320
WIRE 240 336 112 336
WIRE 448 336 448 288
WIRE 448 336 240 336
WIRE 48 352 48 336
FLAG 48 352 0
FLAG 160 240 Ufb
FLAG -560 128 V3
FLAG 160 176 Uop
FLAG -384 192 V1
FLAG -16 192 Soll
SYMBOL LED 224 0 R0
WINDOW 3 69 11 Left 2
SYMATTR Value LXK2-PW14
SYMATTR InstName D1
SYMBOL cap -32 240 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res -32 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10
SYMBOL voltage -384 208 R0
WINDOW 3 -16 156 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 3.3 0 10n 10n 5.8u 10u)
SYMATTR InstName V1
SYMBOL voltage 448 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 5
SYMBOL cap -192 240 R0
SYMATTR InstName C2
SYMATTR Value 1µ
SYMBOL res -208 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 10
SYMBOL res 224 224 R0
SYMATTR InstName R1
SYMATTR Value 48
SYMBOL Opamps\\LT1677 112 112 R0
WINDOW 0 -52 -24 Left 2
WINDOW 3 -110 3 Left 2
SYMATTR InstName U1
SYMBOL cap 128 0 R0
SYMATTR InstName C4
SYMATTR Value 10µ
SYMBOL nmos 192 128 R0
SYMATTR InstName M1
SYMATTR Value BSS123
SYMBOL voltage -560 208 R0
WINDOW 3 -8 189 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 5 0 0.025 0.025 1n 0.025)
SYMATTR InstName V3
TEXT -472 -24 Left 2 !.tran 0.025
TEXT -544 184 Left 2 ;Rampe
TEXT -344 264 Left 2 ;PWM