Version 4
SHEET 1 1968 788
WIRE 784 -64 592 -64
WIRE 1040 -64 784 -64
WIRE 1040 -32 1040 -64
WIRE 592 -16 592 -64
WIRE 784 64 784 -64
WIRE 1040 80 1040 48
WIRE 592 112 592 64
WIRE 720 112 592 112
WIRE 592 160 592 112
WIRE 144 208 96 208
WIRE 304 208 144 208
WIRE 384 208 304 208
WIRE 496 208 448 208
WIRE 528 208 496 208
WIRE 784 208 784 160
WIRE 944 208 784 208
WIRE 1072 208 1008 208
WIRE 1136 208 1072 208
WIRE 784 224 784 208
WIRE 144 240 144 208
WIRE -80 256 -80 208
WIRE -80 336 -80 256
WIRE 144 336 144 304
WIRE 496 368 496 208
WIRE 640 368 496 368
WIRE 784 368 784 304
WIRE 784 368 720 368
WIRE -80 448 -80 416
WIRE 144 448 144 416
WIRE 592 480 592 256
WIRE 688 480 592 480
WIRE 784 480 784 368
WIRE 880 480 784 480
WIRE 1136 480 1136 208
WIRE 592 512 592 480
WIRE 688 512 688 480
WIRE 784 512 784 480
WIRE 880 512 880 480
WIRE 592 624 592 592
WIRE 688 624 688 576
WIRE 688 624 592 624
WIRE 784 624 784 592
WIRE 784 624 688 624
WIRE 880 624 880 576
WIRE 880 624 784 624
WIRE 1136 624 1136 560
WIRE 1136 624 880 624
WIRE 1136 656 1136 624
FLAG 1040 80 0
FLAG 144 448 0
FLAG 1136 656 0
FLAG 1072 208 OUT
FLAG 304 208 IN
FLAG -80 448 0
FLAG -80 256 VAC
SYMBOL Misc\\EuropeanResistor 576 -32 R0
SYMATTR InstName R1
SYMATTR Value 22k
SYMBOL Misc\\EuropeanResistor 736 352 R90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 22k
SYMBOL Misc\\EuropeanResistor 768 208 R0
SYMATTR InstName R5
SYMATTR Value 1k
SYMBOL Misc\\EuropeanResistor 768 496 R0
SYMATTR InstName R6
SYMATTR Value 1k
SYMBOL npn 528 160 R0
SYMATTR InstName Q1
SYMATTR Value BC847C
SYMBOL npn 720 64 R0
SYMATTR InstName Q2
SYMATTR Value BC847C
SYMBOL cap 384 224 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 330p
SYMBOL cap 672 512 R0
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL cap 864 512 R0
SYMATTR InstName C3
SYMATTR Value 47n
SYMBOL cap 944 224 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C4
SYMATTR Value 10n
SYMBOL Misc\\EuropeanResistor 1120 464 R0
SYMATTR InstName RL
SYMATTR Value 22k
SYMBOL voltage 1040 -48 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V1
SYMATTR Value 12
SYMBOL Misc\\EuropeanResistor 576 496 R0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL bv 144 320 R0
SYMATTR InstName SPM0404UD5
SYMATTR Value V=V(VAC, 0) DB FREQ=(1k, 0, 0) (10k, 0, 0) (15k, 0, 0) (32k, 6, 0) (38k, 11, 0) (54k, 11, 0)(60k, 5, 0) (65k, -6, 0) (80k, -15, 0) (90k, -15, 0) (100k, -12, 0) (200k, -12, 0)
SYMBOL voltage -80 320 R0
WINDOW 123 24 96 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 26 22 Left 2
WINDOW 0 22 0 Left 2
SYMATTR Value2 AC 1
SYMATTR Value SINE(0 10m 45k)
SYMATTR InstName V2
SYMBOL Misc\\jumper 208 272 R90
SYMATTR InstName X1
SYMBOL Misc\\jumper 64 144 R0
SYMATTR InstName X2
TEXT 112 584 Left 2 !.ac oct 100 1k 500k