Version 4
SHEET 1 1540 680
WIRE 96 -96 -544 -96
WIRE 496 -96 96 -96
WIRE 640 -96 496 -96
WIRE 1312 -96 640 -96
WIRE 96 0 96 -96
WIRE 1312 0 1312 -96
WIRE 640 48 640 -96
WIRE -544 96 -544 -96
WIRE 1312 96 1312 80
WIRE 1536 96 1312 96
WIRE 496 112 496 -96
WIRE 1312 128 1312 96
WIRE 96 160 96 80
WIRE 96 160 0 160
WIRE 432 160 96 160
WIRE 0 176 0 160
WIRE 640 176 640 128
WIRE 736 176 640 176
WIRE 1104 176 800 176
WIRE 1248 176 1184 176
WIRE 96 192 96 160
WIRE -544 224 -544 176
WIRE 640 272 640 176
WIRE 0 288 0 240
WIRE 96 288 96 272
WIRE 96 288 0 288
WIRE 496 320 496 208
WIRE 576 320 496 320
WIRE 944 352 944 288
WIRE 96 400 96 288
WIRE 640 416 640 368
WIRE 1312 416 1312 224
WIRE 944 464 944 416
FLAG -544 224 0
FLAG 96 400 0
FLAG 944 464 0
FLAG 640 416 0
FLAG 1312 416 0
SYMBOL current 96 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName I1
SYMATTR Value SINE(0 10u 1e6 10u 0 0 10)
SYMBOL voltage -544 80 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3.3
SYMBOL diode 16 240 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL npn 432 112 R0
SYMATTR InstName Q1
SYMATTR Value BC547B
SYMBOL schottky 928 224 R0
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 928 352 R0
SYMATTR InstName C
SYMATTR Value 1n
SYMBOL npn 576 272 R0
SYMATTR InstName Q2
SYMATTR Value BC547B
SYMBOL res 80 -16 R0
SYMATTR InstName R1
SYMATTR Value 5meg
SYMBOL res 624 32 R0
SYMATTR InstName R2
SYMATTR Value 220
SYMBOL cap 800 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL res 1200 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName 220
SYMATTR Value 2.2k
SYMBOL npn 1248 128 R0
SYMATTR InstName Q3
SYMATTR Value BC547B
SYMBOL res 1296 -16 R0
SYMATTR InstName R4
SYMATTR Value 3.3k
TEXT -88 -400 Left 2 !.tran 30u