Version 4
SHEET 1 1324 680
WIRE 400 -208 -336 -208
WIRE 1184 -208 400 -208
WIRE 400 -144 400 -208
WIRE -224 -128 -304 -128
WIRE -96 -128 -144 -128
WIRE -288 -48 -304 -48
WIRE -128 -48 -208 -48
WIRE -96 -48 -128 -48
WIRE 400 -48 400 -64
WIRE 400 -48 352 -48
WIRE 1184 0 1184 -208
WIRE -672 32 -992 32
WIRE -640 32 -672 32
WIRE -336 32 -336 -208
WIRE -336 32 -384 32
WIRE -96 32 -336 32
WIRE 384 32 352 32
WIRE -992 48 -992 32
WIRE -336 48 -336 32
WIRE -96 112 -112 112
WIRE -336 128 -336 112
WIRE -992 144 -992 128
WIRE -512 176 -512 128
WIRE 528 272 352 272
WIRE 944 272 608 272
WIRE 1056 272 1024 272
WIRE 1184 352 1184 80
WIRE 1184 352 352 352
WIRE -672 400 -672 32
WIRE 384 432 352 432
WIRE -672 496 -672 480
WIRE 384 496 384 432
WIRE 384 496 -672 496
WIRE -672 512 -672 496
WIRE -672 608 -672 592
FLAG -112 112 0
FLAG -128 -48 OUT
FLAG -992 144 0
FLAG -336 128 0
FLAG -512 176 0
FLAG -992 32 IN
FLAG -304 -128 0
FLAG -304 -48 0
FLAG -672 608 0
FLAG 1056 272 0
FLAG 384 32 _WDO
SYMBOL VOLTAGE -992 32 R0
WINDOW 123 24 117 Left 2
SYMATTR Value PWL(20u 0 25u 7.5)
SYMATTR InstName V1
SYMATTR SpiceLine Rser=10m
SYMBOL cap -352 48 R0
SYMATTR InstName C1
SYMATTR Value 100µ
SYMBOL PowerProducts\\LT1086-5 -512 32 R0
SYMATTR InstName U1
SYMBOL VOLTAGE -128 -128 R90
WINDOW 123 53 56 VTop 2
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName V2
SYMATTR Value 3
SYMATTR SpiceLine Rser=10m
SYMBOL res -688 384 R0
SYMATTR InstName R1
SYMATTR Value 51K
SYMBOL res -688 496 R0
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL res 384 -160 R0
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL res 1168 -16 R0
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL VOLTAGE 512 272 R270
WINDOW 123 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V3
SYMATTR Value PULSE(0 2 0 1u 1u 20m 40m 6)
SYMATTR SpiceLine Rser=0.1
SYMBOL VOLTAGE 928 272 R270
WINDOW 123 -53 56 VBottom 2
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V4
SYMATTR Value PULSE(0 2 0.4 1u 1u 20m 40m)
SYMATTR SpiceLine Rser=0.1
SYMBOL LTC691 128 160 R0
SYMATTR InstName U2
SYMBOL res -192 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rload
SYMATTR Value 2K
TEXT 832 448 Left 2 !.tran 0.5