Version 4
SHEET 1 2024 684
WIRE -32 -128 -32 -160
WIRE 64 -128 -32 -128
WIRE 112 -128 64 -128
WIRE 224 -128 176 -128
WIRE 304 -128 224 -128
WIRE -32 -96 -32 -128
WIRE 304 -96 304 -128
WIRE 224 -80 224 -128
WIRE -176 -48 -240 -48
WIRE -96 -48 -176 -48
WIRE 224 0 224 -16
WIRE 304 0 304 -16
WIRE 64 80 64 -128
WIRE 480 112 480 80
WIRE 512 112 480 112
WIRE 480 144 480 112
WIRE 224 256 224 240
WIRE 304 256 304 240
WIRE -176 272 -176 -48
WIRE -96 272 -176 272
WIRE -32 352 -32 320
WIRE 64 352 64 144
WIRE 64 352 -32 352
WIRE 112 352 64 352
WIRE 224 352 224 320
WIRE 224 352 176 352
WIRE 304 352 304 336
WIRE 304 352 224 352
WIRE -32 384 -32 352
FLAG 480 0 V++
IOPIN 480 0 BiDir
FLAG 480 224 V--
IOPIN 480 224 BiDir
FLAG 512 112 0
FLAG -320 288 0
FLAG -32 -240 V++
IOPIN -32 -240 BiDir
FLAG -32 0 V--
IOPIN -32 0 BiDir
FLAG 224 0 0
FLAG 224 -128 o+
FLAG -240 -48 in
FLAG -320 208 in
FLAG -32 224 V++
IOPIN -32 224 BiDir
FLAG 224 240 0
FLAG -32 464 V--
IOPIN -32 464 BiDir
FLAG 224 352 o-
FLAG 304 0 0
FLAG 304 240 0
SYMBOL voltage 480 -16 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 480 128 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value 15
SYMBOL voltage -320 192 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 44 Left 2
WINDOW 3 -82 153 Left 2
SYMATTR Value SINE(0 10 2.5meg 0 0 0 1)
SYMATTR InstName V3
SYMBOL pnp2 -96 0 M180
SYMATTR InstName Q1
SYMATTR Value BC556B
SYMBOL Misc\\EuropeanResistor -48 -256 R0
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL cap 208 -80 R0
SYMATTR InstName C1
SYMATTR Value 470p
SYMBOL npn2 -96 224 R0
SYMATTR InstName Q2
SYMATTR Value BC546A
SYMBOL diode 176 368 M270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMATTR Prefix X
SYMBOL cap 208 256 R0
SYMATTR InstName C2
SYMATTR Value 470p
SYMBOL Misc\\EuropeanResistor -48 368 R0
SYMATTR InstName R2
SYMATTR Value 1k
SYMBOL cap 48 80 R0
SYMATTR InstName C3
SYMATTR Value 100n
SYMBOL Misc\\EuropeanResistor 288 -112 R0
SYMATTR InstName R5
SYMATTR Value 220k
SYMBOL Misc\\EuropeanResistor 288 240 R0
SYMATTR InstName R6
SYMATTR Value 220k
SYMBOL diode 112 -112 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D4
SYMATTR Value 1N4148
SYMATTR Prefix X
TEXT -232 -136 Left 2 !.tran 200n
TEXT -312 -184 Left 2 !.options maxstep=1n
TEXT -688 -232 Left 2 !*NXP Semiconductors\n.SUBCKT 1N4148 1 2 \n*\n* The resistor R1 does not reflect \n* a physical device. Instead it\n* improves modeling in the reverse \n* mode of operation.\n*\nR1 1 2 5.827E+9 \nD1 1 2 1N4148\n*\n.MODEL 1N4148 D \n+ IS = 4.352E-9 \n+ N = 1.906 \n+ BV = 110 \n+ IBV = 0.0001 \n+ RS = 0.6458 \n+ CJO = 7.048E-13 \n+ VJ = 0.869 \n+ M = 0.03 \n+ FC = 0.5 \n+ TT = 3.48E-9 \n.ENDS\n*