Version 4
SHEET 1 1152 788
WIRE -176 80 -256 80
WIRE 304 80 -96 80
WIRE 16 160 0 160
WIRE 304 160 304 80
WIRE 304 160 272 160
WIRE 320 160 304 160
WIRE 432 160 384 160
WIRE -720 224 -768 224
WIRE 16 224 -640 224
WIRE 496 224 272 224
WIRE 592 224 576 224
WIRE -192 288 -208 288
WIRE -96 288 -112 288
WIRE 16 288 -96 288
WIRE 304 288 272 288
WIRE 400 288 368 288
WIRE -96 304 -96 288
WIRE 16 352 0 352
WIRE 352 352 272 352
WIRE 352 368 352 352
WIRE -256 400 -256 80
WIRE -224 400 -256 400
WIRE -96 400 -96 384
WIRE -96 400 -144 400
WIRE 0 400 0 352
WIRE 0 400 -96 400
WIRE -256 464 -256 400
WIRE 352 464 352 448
WIRE -256 576 -256 544
FLAG 0 160 0
FLAG 592 224 0
FLAG -256 576 0
FLAG -208 288 0
FLAG -768 224 0
FLAG 400 288 0
FLAG 432 160 0
FLAG 352 464 0
SYMBOL SpecialFunctions\\LTC2909-25 144 256 R0
SYMATTR InstName U1
SYMBOL voltage 480 224 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 -32 56 VBottom 2
SYMATTR InstName V1
SYMATTR Value PWL (0,0 10m,12)
SYMBOL voltage -256 448 R0
SYMATTR InstName V2
SYMATTR Value PULSE(2.5 5 0 1000m 1000m 3000m 5000m)
SYMBOL res -128 384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 57.6K
SYMBOL res -112 400 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R2
SYMATTR Value 1.1K
SYMBOL res -96 304 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 10K
SYMBOL current -640 224 R90
WINDOW 0 -32 40 VBottom 2
WINDOW 3 32 40 VTop 2
SYMATTR InstName I1
SYMATTR Value PWL(0 0 1 0 1.001 1m 2 1m 2.001 -1m 3 -1m 4 -5m 4.001 -5m 5 5m)
SYMBOL cap 368 272 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 22n
SYMBOL cap 384 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 1000p
SYMBOL res -192 96 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R4
SYMATTR Value 10K
SYMBOL voltage 352 352 R0
WINDOW 3 30 89 Left 2
SYMATTR Value PWL(0 0 5010m 0 5011m 0.9 10010m 0.9 10011m 5)
SYMATTR InstName V3
TEXT 432 544 Left 2 !.tran 15