Version 4
SHEET 1 1656 680
WIRE 192 -192 176 -192
WIRE 16 -160 -112 -160
WIRE 176 -160 176 -192
WIRE 176 -160 16 -160
WIRE 240 -160 176 -160
WIRE 416 -160 240 -160
WIRE 608 -160 416 -160
WIRE 832 -160 608 -160
WIRE 944 -160 832 -160
WIRE 832 -144 832 -160
WIRE 944 -144 944 -160
WIRE -112 -128 -112 -160
WIRE 16 -112 16 -160
WIRE 240 -112 240 -160
WIRE 416 -112 416 -160
WIRE 608 -112 608 -160
WIRE -112 -32 -112 -48
WIRE 832 -32 832 -64
WIRE 1040 -32 832 -32
WIRE 832 -16 832 -32
WIRE 240 32 240 -32
WIRE 336 32 240 32
WIRE 416 32 416 -32
WIRE 480 32 416 32
WIRE 720 32 544 32
WIRE 768 32 720 32
WIRE 240 48 240 32
WIRE 16 96 16 -32
WIRE 176 96 16 96
WIRE 416 96 416 32
WIRE 608 96 608 -32
WIRE 624 96 608 96
WIRE 720 96 720 32
WIRE 720 96 704 96
WIRE 16 128 16 96
WIRE 336 144 336 32
WIRE 352 144 336 144
WIRE 240 160 240 144
WIRE -208 176 -224 176
WIRE -64 176 -144 176
WIRE -48 176 -64 176
WIRE -64 192 -64 176
WIRE 608 192 608 96
WIRE 624 192 608 192
WIRE 736 192 704 192
WIRE 944 208 944 -64
WIRE 1040 208 944 208
WIRE 944 224 944 208
WIRE 16 256 16 224
WIRE 288 256 16 256
WIRE 416 256 416 192
WIRE 416 256 368 256
WIRE 416 272 416 256
WIRE 480 272 416 272
WIRE 736 272 736 192
WIRE 736 272 544 272
WIRE 880 272 736 272
WIRE -224 288 -224 176
WIRE -64 304 -64 272
WIRE 128 304 -64 304
WIRE 240 304 240 240
WIRE 240 304 128 304
WIRE 16 320 16 256
WIRE 240 320 240 304
WIRE 416 320 416 272
WIRE 608 320 608 192
WIRE 128 336 128 304
WIRE 832 336 832 80
WIRE 944 336 944 320
WIRE -224 448 -224 368
WIRE 16 448 16 400
WIRE 16 448 -224 448
WIRE 128 448 128 400
WIRE 128 448 16 448
WIRE 160 448 128 448
WIRE 240 448 240 400
WIRE 240 448 160 448
WIRE 416 448 416 400
WIRE 416 448 240 448
WIRE 608 448 608 400
WIRE 608 448 416 448
WIRE 832 448 832 416
WIRE 832 448 608 448
WIRE 944 448 944 416
WIRE 944 448 832 448
WIRE 160 464 160 448
FLAG 160 464 0
FLAG 192 -192 +21V
IOPIN 192 -192 BiDir
FLAG 1040 -32 outA
IOPIN 1040 -32 Out
FLAG 1040 208 outB
IOPIN 1040 208 Out
FLAG -112 -32 0
SYMBOL npn -48 128 R0
WINDOW 3 56 60 Left 2
SYMATTR Value 2N3904
SYMATTR InstName Q13
SYMBOL npn 176 48 R0
WINDOW 3 56 60 Left 2
SYMATTR Value 2N3904
SYMATTR InstName Q14
SYMBOL npn 352 96 R0
WINDOW 3 56 60 Left 2
SYMATTR Value 2N3904
SYMATTR InstName Q16
SYMBOL npn 768 -16 R0
WINDOW 3 56 60 Left 2
SYMATTR Value 2N3904
SYMATTR InstName Q17
SYMBOL npn 880 224 R0
WINDOW 3 56 60 Left 2
SYMATTR Value 2N3904
SYMATTR InstName Q18
SYMBOL res -48 176 M0
SYMATTR InstName R33
SYMATTR Value 100k
SYMBOL res 0 -128 R0
SYMATTR InstName R29
SYMATTR Value 150k
SYMBOL res 0 304 R0
SYMATTR InstName R30
SYMATTR Value 1k
SYMBOL res 256 -128 M0
SYMATTR InstName R31
SYMATTR Value 15k
SYMBOL res 256 144 M0
SYMATTR InstName R32
SYMATTR Value 470
SYMBOL res 400 304 R0
SYMATTR InstName R38
SYMATTR Value 4k7
SYMBOL res 400 -128 R0
SYMATTR InstName R36
SYMATTR Value 3k9
SYMBOL res 816 -160 R0
SYMATTR InstName R43
SYMATTR Value 4k7
SYMBOL res 816 320 R0
SYMATTR InstName R44
SYMATTR Value 820
SYMBOL res 928 -160 R0
SYMATTR InstName R45
SYMATTR Value 4k7
SYMBOL res 928 320 R0
SYMATTR InstName R46
SYMATTR Value 820
SYMBOL res 608 112 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R41
SYMATTR Value 33k
SYMBOL res 720 176 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R42
SYMATTR Value 33k
SYMBOL res 224 304 R0
SYMATTR InstName R34
SYMATTR Value 1k
SYMBOL cap 112 336 R0
SYMATTR InstName C10
SYMATTR Value 100u
SYMBOL res 592 -128 R0
SYMATTR InstName R39
SYMATTR Value 47k
SYMBOL res 592 304 R0
SYMATTR InstName R40
SYMATTR Value 4k7
SYMBOL cap 544 16 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C11
SYMATTR Value 2u2
SYMBOL cap 544 256 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C12
SYMATTR Value 2u2
SYMBOL cap -208 192 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C9
SYMATTR Value 2u2
SYMBOL voltage -224 272 R0
WINDOW 123 24 124 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value2 AC 1
SYMATTR InstName Vin
SYMATTR Value SINE(0 10m 1k)
SYMBOL res 384 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R37
SYMATTR Value 22k
SYMBOL voltage -112 -144 R0
SYMATTR InstName Vcc
SYMATTR Value 21
TEXT 512 -200 Left 2 !.ac dec 5 0.1 1e6
TEXT 488 512 Left 2 !.param beta=245\n*.step dec param beta 10 10e3 2\n.model 2N3904 npn(is=1e-14 vaf=100 Bf={beta})