Version 4
SHEET 1 5092 888
WIRE 1872 -272 1760 -272
WIRE 2352 -272 1872 -272
WIRE 2880 -272 2352 -272
WIRE 2944 -272 2880 -272
WIRE 3040 -272 3024 -272
WIRE 2192 -224 2160 -224
WIRE 2288 -224 2256 -224
WIRE 2720 -224 2688 -224
WIRE 2816 -224 2784 -224
WIRE 2160 -208 2160 -224
WIRE 2288 -208 2288 -224
WIRE 2688 -208 2688 -224
WIRE 2816 -208 2816 -224
WIRE 1408 -160 1376 -160
WIRE 1520 -160 1472 -160
WIRE 1664 -160 1616 -160
WIRE 1808 -160 1664 -160
WIRE 1952 -160 1808 -160
WIRE 2000 -160 1952 -160
WIRE 1664 -128 1664 -160
WIRE 2000 -128 2000 -160
WIRE 1760 -112 1760 -272
WIRE 1952 -112 1952 -160
WIRE 2160 -112 2160 -128
WIRE 2192 -112 2160 -112
WIRE 2288 -112 2288 -128
WIRE 2288 -112 2256 -112
WIRE 2416 -112 2288 -112
WIRE 2688 -112 2688 -128
WIRE 2720 -112 2688 -112
WIRE 2816 -112 2816 -128
WIRE 2816 -112 2784 -112
WIRE 2944 -112 2816 -112
WIRE 2880 -64 2880 -272
WIRE 2352 -48 2352 -272
WIRE 2816 -48 2816 -112
WIRE 2848 -48 2816 -48
WIRE 1872 -32 1872 -272
WIRE 2288 -32 2288 -112
WIRE 2320 -32 2288 -32
WIRE 2944 -32 2944 -112
WIRE 2944 -32 2912 -32
WIRE 2992 -32 2944 -32
WIRE 3232 -32 2992 -32
WIRE 3264 -32 3232 -32
WIRE 3376 -32 3344 -32
WIRE 3424 -32 3376 -32
WIRE 3552 -32 3488 -32
WIRE 3568 -32 3552 -32
WIRE 1584 -16 1584 -112
WIRE 1664 -16 1664 -48
WIRE 1664 -16 1584 -16
WIRE 1808 -16 1808 -160
WIRE 1840 -16 1808 -16
WIRE 2416 -16 2416 -112
WIRE 2416 -16 2384 -16
WIRE 2448 -16 2416 -16
WIRE 2560 -16 2528 -16
WIRE 2592 -16 2560 -16
WIRE 2688 -16 2688 -112
WIRE 2688 -16 2672 -16
WIRE 2704 -16 2688 -16
WIRE 2816 -16 2784 -16
WIRE 2848 -16 2816 -16
WIRE 1952 0 1952 -48
WIRE 1952 0 1904 0
WIRE 2000 0 2000 -48
WIRE 2000 0 1952 0
WIRE 2064 0 2000 0
WIRE 2160 0 2160 -112
WIRE 2160 0 2144 0
WIRE 2176 0 2160 0
WIRE 2288 0 2256 0
WIRE 2320 0 2288 0
WIRE 3232 0 3232 -32
WIRE 1232 16 1200 16
WIRE 1264 16 1232 16
WIRE 1392 16 1344 16
WIRE 1440 16 1392 16
WIRE 1760 16 1760 -32
WIRE 1760 16 1504 16
WIRE 1840 16 1760 16
WIRE 2992 16 2992 -32
WIRE 3376 64 3376 -32
WIRE 3568 64 3568 -32
WIRE 1760 80 1760 16
WIRE 1200 96 1200 16
WIRE 2288 96 2288 0
WIRE 2560 96 2560 -16
WIRE 2816 96 2816 -16
WIRE 3232 96 3232 64
WIRE 3232 96 3184 96
WIRE 1392 112 1392 16
WIRE 2992 144 2992 80
WIRE 3024 144 2992 144
WIRE 3120 144 3104 144
WIRE 2992 160 2992 144
WIRE 1200 256 1200 176
WIRE 1392 256 1392 176
WIRE 1392 256 1200 256
WIRE 1760 256 1760 160
WIRE 1760 256 1392 256
WIRE 1872 256 1872 32
WIRE 1872 256 1760 256
WIRE 2288 256 2288 160
WIRE 2288 256 1872 256
WIRE 2352 256 2352 16
WIRE 2352 256 2288 256
WIRE 2560 256 2560 160
WIRE 2560 256 2352 256
WIRE 2816 256 2816 160
WIRE 2816 256 2560 256
WIRE 2880 256 2880 0
WIRE 2880 256 2816 256
WIRE 2992 256 2992 224
WIRE 2992 256 2880 256
WIRE 3184 256 3184 192
WIRE 3184 256 2992 256
WIRE 3376 256 3376 128
WIRE 3376 256 3184 256
WIRE 3568 256 3568 144
WIRE 3568 256 3376 256
WIRE 1200 272 1200 256
WIRE 1760 272 1760 256
WIRE 1584 352 1584 -16
WIRE 1760 352 1760 336
WIRE 1760 352 1584 352
WIRE 2432 352 1760 352
WIRE 3232 352 3232 96
WIRE 3232 352 2512 352
FLAG 1200 272 0
FLAG 1232 16 src
FLAG 3040 -272 0
FLAG 3552 -32 out
FLAG 1376 -160 0
SYMBOL voltage 1200 80 R0
WINDOW 0 -65 73 Left 2
WINDOW 3 -64 105 Left 2
WINDOW 39 -94 141 Left 2
SYMATTR InstName V1
SYMATTR Value SINE(0 100m 700)
SYMATTR Value2 AC 1
SYMBOL voltage 2928 -272 R270
WINDOW 0 -32 56 VBottom 2
WINDOW 3 32 56 VTop 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V4
SYMATTR Value 8V
SYMBOL res 2160 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 12k
SYMBOL res 2272 -16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 4.7k
SYMBOL cap 2256 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 22n
SYMBOL cap 2304 160 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C3
SYMATTR Value 3.3n
SYMBOL res 2688 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 12k
SYMBOL res 2800 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R7
SYMATTR Value 4.7k
SYMBOL cap 2784 -128 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C5
SYMATTR Value 22n
SYMBOL cap 2832 160 R180
WINDOW 0 24 56 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C6
SYMATTR Value 3.3n
SYMBOL cap 1440 32 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL cap 3488 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C8
SYMATTR Value 47n
SYMBOL res 1776 64 M0
SYMATTR InstName R2
SYMATTR Value 47k
SYMBOL res 1776 -128 M0
SYMATTR InstName R1
SYMATTR Value 47k
SYMBOL res 3584 48 M0
SYMATTR InstName R41
SYMATTR Value 20k
SYMBOL cap 2544 96 R0
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL res 2544 -32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 470
SYMBOL cap 3360 64 R0
SYMATTR InstName C7
SYMATTR Value 22n
SYMBOL res 3360 -48 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 2.2k
SYMBOL res 1360 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1.5k
SYMBOL cap 1376 112 R0
SYMATTR InstName C9
SYMATTR Value 10n
SYMBOL Opamps\\LT1007 2352 -80 R0
WINDOW 0 34 88 Left 2
WINDOW 3 8 124 Left 2
SYMATTR InstName U1
SYMBOL Opamps\\LT1007 2880 -96 R0
WINDOW 0 29 85 Left 2
WINDOW 3 -24 113 Left 2
SYMATTR InstName U2
SYMBOL cap 2784 -240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C10
SYMATTR Value 220n
SYMBOL cap 2256 -240 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C11
SYMATTR Value 220n
SYMBOL res 2800 -224 R0
SYMATTR InstName P1b
SYMATTR Value {r_var}
SYMBOL res 2272 -224 R0
SYMATTR InstName P1a
SYMATTR Value {r_var}
SYMBOL cap 1472 -176 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C16
SYMATTR Value 10µ
SYMBOL res 1984 -32 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R14
SYMATTR Value 10k
SYMBOL cap 1968 -112 M0
SYMATTR InstName C17
SYMATTR Value 3.3n
SYMBOL schottky 3008 224 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BAT43
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 2976 16 R0
SYMATTR InstName C18
SYMATTR Value 22n
SYMBOL npn 3120 96 R0
WINDOW 0 24 111 Left 2
WINDOW 3 24 49 Left 2
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL res 3008 128 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 4.7k
SYMBOL res 2528 368 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R16
SYMATTR Value 180
SYMBOL schottky 3248 64 R180
WINDOW 0 40 32 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D2
SYMATTR Value BAT43
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL njf 1520 -112 R270
WINDOW 0 24 -27 VRight 2
WINDOW 3 -13 -32 VRight 2
SYMATTR InstName J1
SYMATTR Value J310
SYMBOL res 1648 -32 M180
WINDOW 0 -51 59 Left 2
WINDOW 3 -53 25 Left 2
SYMATTR InstName R17
SYMATTR Value 100k
SYMBOL Opamps\\LT1007 1872 -64 R0
WINDOW 0 25 93 Left 2
WINDOW 3 4 123 Left 2
SYMATTR InstName U3
SYMBOL res 2176 -224 M0
SYMATTR InstName R12
SYMATTR Value 180
SYMBOL res 2704 -224 M0
SYMATTR InstName R13
SYMATTR Value 180
SYMBOL cap 1744 272 R0
SYMATTR InstName C12
SYMATTR Value 100µ
TEXT 1104 -128 Left 2 !;tran 0 1 0 100u
TEXT 1104 -96 Left 2 !.ac dec 1k 40 4k
TEXT 1104 -64 Left 2 !;noise v(out) V1 oct 100 10 10k
TEXT 2344 -304 Left 2 !.step param r_var list 1 400 2k 20k