Version 4
SHEET 1 1324 680
WIRE -192 -480 -368 -480
WIRE -96 -480 -192 -480
WIRE 0 -480 -96 -480
WIRE 112 -480 0 -480
WIRE 640 -480 112 -480
WIRE 736 -480 640 -480
WIRE 944 -480 736 -480
WIRE -96 -448 -96 -480
WIRE 736 -448 736 -480
WIRE 0 -432 0 -480
WIRE -368 -400 -368 -480
WIRE -192 -384 -192 -480
WIRE 640 -384 640 -480
WIRE -96 -336 -96 -368
WIRE -96 -336 -128 -336
WIRE 0 -336 0 -368
WIRE 0 -336 -96 -336
WIRE 736 -336 736 -368
WIRE 736 -336 704 -336
WIRE 944 -336 944 -480
WIRE -368 -288 -368 -320
WIRE -192 -288 -224 -288
WIRE 112 -288 112 -480
WIRE 640 -288 608 -288
WIRE -592 -256 -592 -272
WIRE -448 -256 -592 -256
WIRE -224 -240 -224 -288
WIRE 608 -240 608 -288
WIRE -592 -224 -592 -256
WIRE -96 -224 -96 -336
WIRE 736 -224 736 -336
WIRE -224 -128 -224 -160
WIRE -192 -128 -224 -128
WIRE -96 -128 -96 -144
WIRE -96 -128 -128 -128
WIRE 112 -128 112 -208
WIRE 112 -128 -96 -128
WIRE 208 -128 112 -128
WIRE 608 -128 608 -160
WIRE 640 -128 608 -128
WIRE 736 -128 736 -144
WIRE 736 -128 704 -128
WIRE 944 -128 944 -256
WIRE 944 -128 736 -128
WIRE 1040 -128 944 -128
WIRE -592 -96 -592 -144
WIRE -96 -96 -96 -128
WIRE 736 -96 736 -128
WIRE -448 -48 -448 -256
WIRE -336 -48 -448 -48
WIRE -224 -48 -224 -128
WIRE -224 -48 -256 -48
WIRE -160 -48 -224 -48
WIRE 336 -48 320 -48
WIRE 464 -48 416 -48
WIRE 496 -48 464 -48
WIRE 608 -48 608 -128
WIRE 608 -48 576 -48
WIRE 672 -48 608 -48
WIRE 464 -32 464 -48
WIRE -96 48 -96 0
WIRE 464 48 464 32
WIRE 736 48 736 0
WIRE -448 96 -448 -48
WIRE 320 96 320 -48
WIRE 320 96 -448 96
FLAG -96 48 0
FLAG 208 -128 Out
IOPIN 208 -128 Out
FLAG -592 -272 In
IOPIN -592 -272 In
FLAG -368 -288 0
FLAG -592 -96 0
FLAG 736 48 0
FLAG 1040 -128 Out1
IOPIN 1040 -128 Out
FLAG 464 48 0
SYMBOL pnp -128 -288 R180
SYMATTR InstName Q1
SYMATTR Value BC856B
SYMBOL npn -160 -96 R0
SYMATTR InstName Q2
SYMATTR Value BC846B
SYMBOL res -240 -256 R0
SYMATTR InstName R1
SYMATTR Value 4k7
SYMBOL res -112 -240 R0
SYMATTR InstName R2
SYMATTR Value 3k3
SYMBOL res -112 -464 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL cap -16 -432 R0
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL res -240 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL voltage -368 -416 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -98 110 Left 2
SYMATTR InstName V1
SYMATTR Value PULSE(0 5 0 1u)
SYMBOL voltage -592 -240 R0
WINDOW 3 -199 189 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(0 5 1u 1n 1n {x}1u 1)
SYMATTR InstName V2
SYMBOL diode -192 -112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL res 96 -304 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL pnp 704 -288 R180
SYMATTR InstName Q3
SYMATTR Value BC856B
SYMBOL npn 672 -96 R0
SYMATTR InstName Q4
SYMATTR Value BC846B
SYMBOL res 592 -256 R0
SYMATTR InstName R6
SYMATTR Value 4k7
SYMBOL res 720 -240 R0
SYMATTR InstName R7
SYMATTR Value 4k7
SYMBOL res 720 -464 R0
SYMATTR InstName R8
SYMATTR Value 10k
SYMBOL res 592 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 4k7
SYMBOL diode 640 -112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL res 928 -352 R0
SYMATTR InstName R10
SYMATTR Value 1k
SYMBOL res 432 -64 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 5k6
SYMBOL cap 448 -32 R0
SYMATTR InstName C3
SYMATTR Value 220p
TEXT -816 -8 Left 2 !.step param x list 100n 200n 400n
TEXT -816 72 Left 2 !.tran 3u
TEXT 40 -424 Left 5 ;C
TEXT -40 -192 Left 5 ;R
TEXT 520 24 Left 5 ;C
TEXT 344 -128 Left 5 ;R
TEXT 320 -456 Left 4 ;+5V