Version 4
SHEET 1 4212 1120
WIRE 2304 224 1840 224
WIRE 2304 256 2304 224
WIRE 2608 272 2352 272
WIRE 2720 272 2688 272
WIRE 2368 320 2352 320
WIRE 1840 384 1840 224
WIRE 1840 384 1744 384
WIRE 1872 384 1840 384
WIRE 2176 384 2096 384
WIRE 2304 384 2304 336
WIRE 2304 384 2176 384
WIRE 2400 384 2304 384
WIRE 1744 400 1744 384
WIRE 2176 400 2176 384
WIRE 2304 416 2304 384
WIRE 2608 432 2352 432
WIRE 2720 432 2688 432
WIRE 1984 480 1984 448
WIRE 2176 480 2176 464
WIRE 2368 480 2352 480
WIRE 1744 496 1744 480
WIRE 2304 512 2304 496
FLAG 1984 480 0
FLAG 2400 384 OUT
FLAG 1744 384 IN
FLAG 1744 496 0
FLAG 2176 480 0
FLAG 2304 512 0
FLAG 2368 480 0
FLAG 2720 432 0
FLAG 2368 320 0
FLAG 2720 272 0
SYMBOL voltage 1744 384 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 2
SYMBOL cap 2160 400 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL sw 2304 512 R180
WINDOW 0 -15 104 Right 2
WINDOW 3 -11 15 Right 2
SYMATTR InstName S1
SYMATTR Value 5mA
SYMBOL voltage 2592 432 R270
WINDOW 123 -74 56 VBottom 2
WINDOW 39 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V2
SYMATTR Value PULSE(0 1 600u 10n 10n 200u 10m)
SYMBOL sw 2304 352 R180
WINDOW 0 -17 112 Right 2
WINDOW 3 -12 4 Right 2
SYMATTR InstName S2
SYMATTR Value 5mA
SYMBOL voltage 2592 272 M90
WINDOW 123 74 56 VTop 2
WINDOW 39 53 56 VTop 2
WINDOW 3 32 56 VTop 2
WINDOW 0 -32 56 VBottom 2
SYMATTR Value PULSE(0 1 100u 10n 10n 200u 10m)
SYMATTR InstName V3
SYMBOL LT6654-1.25 1984 384 R0
SYMATTR InstName U1
TEXT 2144 600 Left 2 !.tran 1m\n.model 5mA SW(Ron=10 Roff=1Meg Vt=.5 Vh=-.1 Ilimit=5m level=2)
TEXT 1952 208 Bottom 2 ;Turn on and off 5mA of sink current\nand then on and off 5mA of source current