Version 4
SHEET 1 880 680
WIRE 64 80 16 80
WIRE 160 80 144 80
WIRE 224 80 160 80
WIRE 16 128 16 80
WIRE 160 128 160 80
WIRE 224 128 224 80
WIRE 16 208 0 208
WIRE 0 240 0 208
WIRE 80 240 0 240
WIRE 192 240 192 208
WIRE 192 240 80 240
FLAG 80 240 0
SYMBOL voltage 16 112 R0
WINDOW 3 0 183 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(-25 5 0 10n 10n 100m 200m)
SYMBOL BAT54C 224 160 R0
SYMATTR InstName U1
SYMBOL res 160 64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 5k
TEXT -18 264 Left 2 !.tran 1