Version 4
SHEET 1 1476 680
WIRE -688 -304 -688 -336
WIRE -496 -304 -496 -336
WIRE -688 -176 -688 -224
WIRE -496 -176 -496 -224
WIRE -48 0 -48 -80
WIRE 336 80 336 -80
WIRE -160 128 -176 128
WIRE -48 128 -48 80
WIRE -48 128 -96 128
WIRE 240 128 -48 128
WIRE 272 128 240 128
WIRE -48 160 -48 128
WIRE -336 208 -432 208
WIRE -176 208 -176 128
WIRE -176 208 -256 208
WIRE -112 208 -176 208
WIRE 864 208 864 -80
WIRE 336 224 336 176
WIRE 512 224 336 224
WIRE 816 224 592 224
WIRE 336 256 336 224
WIRE 240 304 240 128
WIRE 272 304 240 304
WIRE 720 320 640 320
WIRE 864 320 864 304
WIRE 864 320 720 320
WIRE 944 320 864 320
WIRE 1120 320 1024 320
WIRE -48 336 -48 256
WIRE -176 352 -176 208
WIRE 640 352 640 320
WIRE 720 352 720 320
WIRE 864 352 864 320
WIRE -176 448 -176 416
WIRE -48 448 -48 416
WIRE -48 448 -176 448
WIRE -48 480 -48 448
WIRE 336 480 336 352
WIRE 640 480 640 416
WIRE 720 480 720 416
WIRE 864 480 864 432
FLAG -48 480 0
FLAG 336 480 0
FLAG 864 480 0
FLAG -496 -176 0
FLAG -688 -176 0
FLAG -688 -336 Ub
FLAG -496 -336 square_in
FLAG -432 208 square_in
FLAG -48 -80 Ub
FLAG 336 -80 Ub
FLAG 864 -80 Ub
FLAG 1120 320 square_out
FLAG 640 480 0
FLAG 720 480 Ub
SYMBOL npn -112 160 R0
SYMATTR InstName Q1
SYMATTR Value 2N4401
SYMBOL npn 272 80 R0
SYMATTR InstName Q2
SYMATTR Value 2N4401
SYMBOL pnp 272 352 M180
SYMATTR InstName Q3
SYMATTR Value 2N4403
SYMBOL res -64 -16 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -64 320 R0
SYMATTR InstName R2
SYMATTR Value 470
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL pmos 816 304 M180
SYMATTR InstName M1
SYMATTR Value IRF7205
SYMBOL voltage -688 -320 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -496 -320 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 5 0 1n 1n 0.0005 0.001 0)
SYMBOL res 848 336 R0
SYMATTR InstName R3
SYMATTR Value 220
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL res -240 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 4.7k
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL diode 656 416 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BAV99HM
SYMBOL res 1040 304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 100
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL schottky -160 416 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value 1N5818
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -160 112 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D3
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL res 608 208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 100
SYMATTR SpiceLine tol=1 pwr=0.1
SYMBOL diode 704 352 R0
SYMATTR InstName D4
SYMATTR Value BAV99HM
TEXT -898 -216 Left 2 !.tran 0 5ms 1ms