Version 4 SHEET 1 880 680 WIRE 160 -32 -240 -32 WIRE 416 -32 160 -32 WIRE 496 -32 416 -32 WIRE 496 0 496 -32 WIRE 416 96 416 -32 WIRE 464 96 416 96 WIRE 496 112 496 80 WIRE 464 128 464 96 WIRE 496 128 496 112 WIRE -240 144 -240 -32 WIRE -240 144 -256 144 WIRE 416 144 -208 144 WIRE 576 176 544 176 WIRE 640 176 576 176 WIRE -224 192 -256 192 WIRE -208 192 -208 144 WIRE -208 192 -224 192 WIRE 192 208 112 208 WIRE 320 208 192 208 WIRE 400 208 384 208 WIRE 416 208 400 208 WIRE -240 240 -256 240 WIRE 192 240 192 208 WIRE 320 240 320 208 WIRE -208 256 -208 192 WIRE -192 256 -208 256 WIRE -64 256 -112 256 WIRE 64 256 16 256 WIRE 144 256 64 256 WIRE 256 256 240 256 WIRE 272 256 256 256 WIRE 384 256 384 208 WIRE 384 256 368 256 WIRE 464 256 384 256 WIRE 576 256 576 176 WIRE 576 256 528 256 WIRE 256 288 256 256 WIRE 192 336 192 320 WIRE 320 336 320 320 WIRE -240 400 -240 240 WIRE -240 448 -240 400 WIRE 112 448 112 208 WIRE 112 448 -240 448 WIRE 192 448 192 416 WIRE 192 448 112 448 WIRE 256 448 256 352 WIRE 256 448 192 448 WIRE 320 448 320 416 WIRE 320 448 256 448 WIRE -240 464 -240 448 FLAG 640 176 AUS IOPIN 640 176 Out FLAG -240 464 0 FLAG 496 112 UB FLAG 160 -32 VDD FLAG -224 192 UREF FLAG -240 400 VSS FLAG 400 208 UX FLAG 64 256 UIN FLAG 256 256 UY FLAG 320 320 U2 FLAG 192 320 U1 SYMBOL current 496 0 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName I1 SYMATTR Value 30µ SYMBOL voltage -96 256 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 39 120 VTop 2 WINDOW 123 46 56 VTop 2 WINDOW 39 0 0 Left 2 SYMATTR InstName VIN1 SYMATTR Value PULSE(0 0.5 3.3m 100n 100n 1m 4m 5) SYMBOL power -320 192 M0 SYMATTR InstName POW SYMBOL opa3 464 176 R0 SYMATTR InstName X1 SYMBOL cap 528 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 200p SYMBOL voltage 32 256 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 -77 31 VTop 2 WINDOW 123 46 56 VTop 2 WINDOW 39 0 0 Left 2 SYMATTR InstName VIN2 SYMATTR Value PULSE(0 -0.5 1.3m 100n 100n 1m 4m 5) SYMBOL na 368 304 M270 SYMATTR InstName U1 SYMBOL na 240 304 M270 SYMATTR InstName U2 SYMBOL cap 240 288 R0 SYMATTR InstName C2 SYMATTR Value 10p SYMBOL voltage 192 320 R0 WINDOW 3 -253 102 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 111u 100n 100n 9u 20u) SYMATTR InstName V1 SYMBOL voltage 320 320 R0 WINDOW 3 12 101 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value PULSE(0 5 101u 100n 100n 9u 20u) SYMATTR InstName V2 TEXT -216 0 Left 2 !.include C:/Programs/LTspiceIV/lib/sub/GFlev8.sub TEXT -216 40 Left 2 !.tran 33m TEXT -216 80 Left 2 !.ic v(AUS) = 2.5 v(UY) = 2.5 v(UX) = 2.5 TEXT 384 328 Left 2 ;R equ = 1/(fC) = T/C = 20µ/10p = 2 MegOhm TEXT 384 352 Left 2 ;Tint = RC = 2Meg x 200p = 0,4 msec TEXT 384 376 Left 2 ;DeltaU = U0 x Delta-t / Tint = 0,5V x 1msec / 0,4msec