Version 4 SHEET 1 880 680 WIRE 160 -32 -240 -32 WIRE 272 -32 160 -32 WIRE 352 -32 272 -32 WIRE 352 0 352 -32 WIRE 272 96 272 -32 WIRE 320 96 272 96 WIRE 352 112 352 80 WIRE 320 128 320 96 WIRE 352 128 352 112 WIRE -240 144 -240 -32 WIRE -240 144 -256 144 WIRE 272 144 -208 144 WIRE 432 176 400 176 WIRE 496 176 432 176 WIRE -224 192 -256 192 WIRE -208 192 -208 144 WIRE -208 192 -224 192 WIRE 256 208 240 208 WIRE 272 208 256 208 WIRE -240 240 -256 240 WIRE -208 256 -208 192 WIRE -192 256 -208 256 WIRE -64 256 -112 256 WIRE 64 256 16 256 WIRE 96 256 64 256 WIRE 240 256 240 208 WIRE 240 256 176 256 WIRE 320 256 240 256 WIRE 432 256 432 176 WIRE 432 256 384 256 WIRE -240 288 -240 240 WIRE -240 320 -240 288 FLAG 496 176 AUS IOPIN 496 176 Out FLAG -240 320 0 FLAG 352 112 UB FLAG 160 -32 VDD FLAG -224 192 UREF FLAG -240 288 VSS FLAG 256 208 UX FLAG 64 256 UIN SYMBOL current 352 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 92 64 VTop 2 WINDOW 123 46 56 VTop 2 WINDOW 39 0 0 Left 2 SYMATTR InstName VIN1 SYMATTR Value PULSE(0 1 8.1m 100n 100n 3m 12m 5) SYMBOL power -320 192 M0 SYMATTR InstName POW SYMBOL opa3 320 176 R0 SYMATTR InstName X1 SYMBOL res 192 240 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL cap 384 240 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C1 SYMATTR Value 100n SYMBOL voltage 32 256 R90 WINDOW 0 -32 56 VBottom 2 WINDOW 3 55 34 VTop 2 WINDOW 123 46 56 VTop 2 WINDOW 39 0 0 Left 2 SYMATTR InstName VIN2 SYMATTR Value PULSE(0 -1 2.1m 100n 100n 3m 12m 5) TEXT -216 0 Left 2 !.include C:/Programs/LTspiceIV/lib/sub/GFlev8.sub TEXT -208 40 Left 2 !.tran 0 75m 1u TEXT -208 72 Left 2 !.ic v(UIN) = 2.5 v(AUS) = 2.5 TEXT 168 320 Left 2 ;Alapállapot: IB = 30µA, C1 = 100nF, R1 = 10kOhm\nElrontva: TEXT 256 344 Left 2 ;T = 4msec --> 12msec