Version 4
SHEET 1 1252 680
WIRE 160 48 -160 48
WIRE -160 80 -160 48
WIRE 160 80 160 48
WIRE 464 128 320 128
WIRE 320 160 320 128
WIRE -160 176 -160 160
WIRE 160 176 160 160
WIRE 272 176 160 176
WIRE 160 208 160 176
WIRE -32 224 -176 224
WIRE 112 224 -32 224
WIRE 464 256 464 128
WIRE 528 256 464 256
WIRE 1104 256 528 256
WIRE 112 272 32 272
WIRE 272 272 272 224
WIRE 320 272 320 240
WIRE 32 288 32 272
WIRE 32 288 -224 288
WIRE 1104 320 848 320
WIRE 160 336 160 288
WIRE 848 336 848 320
WIRE 528 368 528 256
WIRE 624 368 528 368
WIRE 736 368 736 352
WIRE 736 368 688 368
WIRE 848 464 848 416
FLAG 160 336 0
FLAG -160 176 0
FLAG 320 272 0
FLAG 272 272 0
FLAG -32 224 ctrl
FLAG -176 224 ctrl
IOPIN -176 224 BiDir
FLAG -224 288 carrier
IOPIN -224 288 BiDir
FLAG 1104 320 Pos
IOPIN 1104 320 BiDir
FLAG 1104 256 Neg
IOPIN 1104 256 BiDir
FLAG 736 352 out
FLAG 848 464 0
SYMBOL sw 160 304 M180
SYMATTR InstName S2
SYMATTR Value comp
SYMBOL res 144 64 R0
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL e 320 144 R0
SYMATTR InstName E1
SYMATTR Value 1
SYMBOL Digital\\inv 624 304 R0
SYMATTR InstName A1
SYMBOL bv 848 320 R0
SYMATTR InstName B1
SYMATTR Value V=5*V(out)
SYMBOL voltage -160 64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 5
TEXT -56 528 Left 2 !.model comp sw (ron=10 Roff=1e8 Vt=0 Vh=0.1)
TEXT -56 608 Left 2 !.tran 0 60m 0 10n