Version 4
SHEET 1 880 680
WIRE -7504 -3136 -7552 -3136
WIRE -7472 -3136 -7504 -3136
WIRE -7552 -3120 -7552 -3136
WIRE -7504 -3088 -7504 -3136
WIRE -7120 -3056 -7136 -3056
WIRE -8128 -3040 -8144 -3040
WIRE -7968 -3040 -8032 -3040
WIRE -7136 -3040 -7136 -3056
WIRE -7552 -3024 -7552 -3040
WIRE -7552 -3024 -7920 -3024
WIRE -7920 -3008 -7920 -3024
WIRE -7760 -2960 -7856 -2960
WIRE -7504 -2960 -7504 -3008
WIRE -7136 -2944 -7136 -2960
WIRE -7104 -2944 -7136 -2944
WIRE -7552 -2928 -7552 -3024
WIRE -7552 -2928 -7616 -2928
WIRE -7104 -2928 -7104 -2944
WIRE -7424 -2912 -7456 -2912
WIRE -7136 -2912 -7136 -2944
WIRE -8064 -2896 -8064 -2912
WIRE -8240 -2880 -8272 -2880
WIRE -8144 -2880 -8144 -3040
WIRE -8144 -2880 -8160 -2880
WIRE -8096 -2880 -8144 -2880
WIRE -7968 -2864 -7968 -3040
WIRE -7968 -2864 -8032 -2864
WIRE -7872 -2864 -7968 -2864
WIRE -7760 -2864 -7760 -2960
WIRE -7760 -2864 -7792 -2864
WIRE -8096 -2848 -8112 -2848
WIRE -8272 -2832 -8272 -2880
WIRE -7504 -2832 -7504 -2880
WIRE -8112 -2816 -8112 -2848
WIRE -7600 -2816 -7600 -2848
WIRE -7136 -2816 -7136 -2832
WIRE -7120 -2816 -7136 -2816
WIRE -8064 -2800 -8064 -2832
WIRE -7552 -2800 -7552 -2928
WIRE -7552 -2800 -7568 -2800
WIRE -7920 -2784 -7920 -2912
WIRE -7920 -2784 -8016 -2784
WIRE -7872 -2784 -7920 -2784
WIRE -7712 -2784 -7712 -2928
WIRE -7712 -2784 -7792 -2784
WIRE -7632 -2784 -7712 -2784
WIRE -7552 -2768 -7568 -2768
WIRE -7376 -2768 -7408 -2768
WIRE -7280 -2768 -7296 -2768
WIRE -7024 -2768 -7264 -2768
WIRE -7760 -2752 -7760 -2864
WIRE -7552 -2736 -7552 -2768
WIRE -7504 -2736 -7504 -2752
WIRE -8272 -2720 -8272 -2752
WIRE -8144 -2720 -8144 -2880
WIRE -8128 -2720 -8144 -2720
WIRE -8016 -2720 -8016 -2784
WIRE -8016 -2720 -8032 -2720
WIRE -7600 -2720 -7600 -2752
WIRE -7200 -2688 -7200 -2704
WIRE -7264 -2672 -7264 -2768
WIRE -7232 -2672 -7264 -2672
WIRE -7968 -2656 -7968 -2864
WIRE -7552 -2656 -7968 -2656
WIRE -7408 -2656 -7408 -2768
WIRE -7408 -2656 -7472 -2656
WIRE -7392 -2656 -7408 -2656
WIRE -7104 -2656 -7168 -2656
WIRE -7024 -2656 -7024 -2768
WIRE -7024 -2656 -7040 -2656
WIRE -6992 -2656 -7024 -2656
WIRE -7280 -2640 -7280 -2768
WIRE -7280 -2640 -7328 -2640
WIRE -7232 -2640 -7280 -2640
WIRE -8080 -2624 -8080 -2656
WIRE -7760 -2624 -7760 -2672
WIRE -7424 -2624 -7424 -2912
WIRE -7392 -2624 -7424 -2624
WIRE -7200 -2608 -7200 -2624
FLAG -8064 -2912 +12V
FLAG -8272 -2720 0
FLAG -7104 -2928 0
FLAG -7120 -3056 +12V
FLAG -7120 -2816 -12V
FLAG -8080 -2624 0
FLAG -8064 -2800 -12V
FLAG -8112 -2816 0
FLAG -7760 -2624 0
FLAG -7600 -2848 +12V
FLAG -7600 -2720 -12V
FLAG -7552 -2736 0
FLAG -7360 -2672 +12V
FLAG -7360 -2608 -12V
FLAG -7472 -3136 +12V
FLAG -7200 -2704 +12V
FLAG -7200 -2608 -12V
FLAG -7504 -2736 0
SYMBOL Misc\\EuropeanResistor -8256 -2864 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R1
SYMATTR Value 100k
SYMBOL voltage -8272 -2848 R0
WINDOW 3 -144 178 Left 2
WINDOW 123 24 44 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 32 108 Left 2
SYMATTR Value ""
SYMATTR InstName V3
SYMBOL voltage -7136 -3056 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 40 33 Left 2
WINDOW 3 39 73 Left 2
SYMATTR InstName V1
SYMATTR Value 12V
SYMBOL voltage -7136 -2928 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
WINDOW 0 43 38 Left 2
WINDOW 3 43 76 Left 2
SYMATTR InstName V2
SYMATTR Value 12V
SYMBOL Misc\\EuropeanResistor -7888 -2848 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R2
SYMATTR Value 15k
SYMBOL Misc\\EuropeanResistor -7744 -2768 M0
SYMATTR InstName R4
SYMATTR Value 2.2k
SYMBOL Misc\\EuropeanResistor -7776 -2768 M270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R3
SYMATTR Value 2k
SYMBOL Misc\\EuropeanResistor -7536 -3024 R180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R5
SYMATTR Value 1.5meg
SYMBOL cap -8064 -3056 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 220p
SYMBOL cap -7616 -2944 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 33p
SYMBOL npn2 -8128 -2656 R270
WINDOW 0 23 -19 VRight 2
WINDOW 3 -15 -68 VRight 2
SYMATTR InstName Q1
SYMATTR Value BC413
SYMBOL npn2 -7856 -3008 M0
WINDOW 0 -37 22 Left 2
WINDOW 3 -70 73 Left 2
SYMATTR InstName Q2
SYMATTR Value BC413
SYMBOL Opamps\\opamp2 -8064 -2928 R0
WINDOW 3 9 109 Left 2
SYMATTR Value TL084
SYMATTR InstName U1
SYMBOL Opamps\\opamp2 -7600 -2848 M0
SYMATTR InstName U2
SYMATTR Value TL084
SYMBOL Opamps\\opamp2 -7360 -2704 R0
SYMATTR InstName U3
SYMATTR Value TL084
SYMBOL Misc\\EuropeanResistor -7568 -2640 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R6
SYMATTR Value 200k
SYMBOL Misc\\EuropeanResistor -7392 -2752 R270
WINDOW 0 27 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName R7
SYMATTR Value 220k
SYMBOL Opamps\\opamp2 -7200 -2720 R0
WINDOW 3 17 115 Left 2
SYMATTR InstName U4
SYMATTR Value TL084
SYMBOL diode -7104 -2640 R270
WINDOW 0 41 30 VTop 2
WINDOW 3 -5 33 VBottom 2
SYMATTR InstName D1
SYMATTR Value DD
SYMBOL Misc\\EuropeanResistor -7520 -3104 R0
SYMATTR InstName R8
SYMATTR Value 20k
SYMBOL Misc\\EuropeanResistor -7520 -2736 M180
WINDOW 0 31 76 Left 2
WINDOW 3 31 40 Left 2
SYMATTR InstName R10
SYMATTR Value 3.9k
SYMBOL potentiometer_standard -7520 -2976 R0
WINDOW 0 43 14 Left 2
WINDOW 3 43 42 Left 2
WINDOW 38 88 13 Left 2
SYMATTR InstName U5
SYMATTR Value Rtot=1K wiper=0.5
SYMATTR SpiceLine ""
TEXT -8056 -2584 Left 2 ;.tran 100m
TEXT -8320 -2584 Left 2 !.dc dec V3 0.2m 1.91 20
TEXT -7912 -2584 Left 2 !.temp 15 35
TEXT -7392 -3072 Left 2 !.include bc.lib
TEXT -7392 -3040 Left 2 !.include TL084.301
TEXT -7392 -3136 Left 2 !.model DD D(Is=22n N=2.1)
TEXT -7392 -3104 Left 2 !.include potentiometer_standard.lib