Version 4
SHEET 1 880 680
WIRE 160 -16 -240 -16
WIRE 640 -16 320 -16
WIRE -240 0 -240 -16
WIRE 640 0 640 -16
WIRE 160 64 160 -16
WIRE 320 64 320 -16
WIRE -240 96 -240 80
WIRE 640 96 640 80
WIRE 112 128 -240 128
WIRE 384 128 368 128
WIRE 480 128 464 128
WIRE 528 128 480 128
WIRE -240 144 -240 128
WIRE 528 144 528 128
WIRE 112 192 96 192
WIRE 480 192 480 128
WIRE 480 192 368 192
WIRE 528 224 528 208
WIRE -240 240 -240 224
WIRE 160 272 160 256
WIRE 320 272 320 256
FLAG 160 272 0
FLAG 320 272 0
FLAG 528 224 0
FLAG 528 128 OUT
FLAG 640 96 0
FLAG -240 96 0
FLAG -240 240 0
FLAG 96 192 0
SYMBOL voltage -240 -16 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage 640 -16 R0
WINDOW 123 24 132 Left 2
WINDOW 39 24 114 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL res 480 112 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 5
SYMBOL cap 512 144 R0
SYMATTR InstName C1
SYMATTR Value 2n
SYMBOL voltage -240 128 R0
WINDOW 123 24 132 Left 2
WINDOW 39 24 114 Left 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 5 0 2n 2n 998n 2u)
SYMBOL PowerProducts\\ADUm4121A 240 160 R0
SYMATTR InstName U1
TEXT 440 288 Left 2 !.tran 100u startup