Version 4
SHEET 1 1676 1040
WIRE 464 -80 128 -80
WIRE 656 -80 464 -80
WIRE 864 -80 656 -80
WIRE 1184 -80 864 -80
WIRE 1184 -48 1184 -80
WIRE 656 0 656 -80
WIRE 128 32 128 -80
WIRE 464 64 464 -80
WIRE 1184 64 1184 32
WIRE 864 96 864 -80
WIRE 656 144 656 80
WIRE 800 144 656 144
WIRE 128 176 128 112
WIRE 336 176 128 176
WIRE 336 192 336 176
WIRE 128 224 128 176
WIRE 656 224 656 144
WIRE 864 240 864 192
WIRE 1056 240 864 240
WIRE 1216 240 1120 240
WIRE 1248 240 1216 240
WIRE -320 272 -432 272
WIRE -240 272 -256 272
WIRE -128 272 -160 272
WIRE 0 272 -64 272
WIRE 64 272 0 272
WIRE 336 272 336 256
WIRE 464 272 464 144
WIRE 464 272 336 272
WIRE 592 272 464 272
WIRE -432 320 -432 272
WIRE 864 320 864 240
WIRE -432 368 -432 320
WIRE 0 384 0 272
WIRE 288 384 0 384
WIRE 656 384 656 320
WIRE 656 384 368 384
WIRE 1248 384 1248 240
WIRE 656 416 656 384
WIRE 864 416 864 400
WIRE 864 416 656 416
WIRE 960 416 864 416
WIRE 1088 416 1040 416
WIRE 464 448 464 272
WIRE 128 464 128 320
WIRE 224 464 128 464
WIRE -432 480 -432 448
WIRE 128 496 128 464
WIRE 224 512 224 464
WIRE 864 512 864 416
WIRE 1088 512 1088 416
WIRE -192 576 -192 560
WIRE 128 624 128 576
WIRE 224 624 224 576
WIRE 224 624 128 624
WIRE 464 624 464 528
WIRE 464 624 224 624
WIRE 864 624 864 592
WIRE 864 624 464 624
WIRE 1088 624 1088 576
WIRE 1088 624 864 624
WIRE 1248 624 1248 464
WIRE 1248 624 1088 624
WIRE -192 640 -192 624
WIRE -192 656 -192 640
WIRE 864 672 864 624
WIRE -192 768 -192 736
FLAG -192 768 0
FLAG -432 480 0
FLAG -432 320 VAC
FLAG 1184 64 0
FLAG 864 672 0
FLAG -192 640 mic
FLAG 1216 240 amp
SYMBOL npn 592 224 R0
SYMATTR InstName Q1
SYMATTR Value BC847C
SYMBOL pnp 800 192 M180
SYMATTR InstName Q2
SYMATTR Value BC857C
SYMBOL res 448 48 R0
SYMATTR InstName R1
SYMATTR Value 47k
SYMBOL res 448 432 R0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL cap -64 256 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 330p
SYMBOL res 848 304 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 848 496 R0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res 1056 400 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 2.2
SYMBOL cap 1072 512 R0
SYMATTR InstName C2
SYMATTR Value 330n
SYMBOL cap 1056 256 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C3
SYMATTR Value 10n
SYMBOL res 1232 368 R0
SYMATTR InstName R6
SYMATTR Value 22k
SYMBOL bv -192 640 R0
WINDOW 3 22 100 Left 2
SYMATTR Value V=V(VAC, 0) DB FREQ=(1k, -3. 0) (10k, -3., 0) (12.5k, 0, 0) (25k, -12, 0) (50k, -24, 0)(100k, -36, 0)
SYMATTR InstName SPM1
SYMBOL Misc\\jumper -128 592 R90
SYMATTR InstName X1
SYMBOL Misc\\jumper -288 208 R0
SYMATTR InstName X2
SYMBOL voltage -432 352 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 40k)
SYMATTR InstName V1
SYMBOL voltage 1184 -64 R0
WINDOW 123 0 0 Left 2
WINDOW 39 24 124 Left 2
SYMATTR SpiceLine Rser=1
SYMATTR InstName V2
SYMATTR Value 3.3
SYMBOL res 640 -16 R0
SYMATTR InstName R7
SYMATTR Value 4.7k
SYMBOL res -144 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName Rx
SYMATTR Value 5k
SYMBOL res 112 16 R0
SYMATTR InstName R8
SYMATTR Value 2.2k
SYMBOL res 112 480 R0
SYMATTR InstName R9
SYMATTR Value 22
SYMBOL npn 64 224 R0
SYMATTR InstName Q3
SYMATTR Value BC847C
SYMBOL cap 320 192 R0
SYMATTR InstName C4
SYMATTR Value 33p
SYMBOL res 384 368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 220k
SYMBOL cap 208 512 R0
SYMATTR InstName C5
SYMATTR Value 220n
TEXT -376 -200 Left 2 !.ac oct 100 1k 10Meg
TEXT -376 -160 Left 2 ;.tran 2m
TEXT -384 -240 Left 2 !.op
TEXT -424 872 Left 2 ;V=V(VAC, 0) DB FREQ=(1k, -3. 0) (10k, -3., 0) (12.5k, 0, 0) (25k, -12, 0) (50k, -24, 0)(100k, -36, 0)
TEXT -416 936 Left 2 ;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)