Version 4
SHEET 1 880 680
WIRE -64 -656 -112 -656
WIRE 96 -656 16 -656
WIRE -560 -592 -624 -592
WIRE -496 -592 -560 -592
WIRE -112 -544 -112 -656
WIRE -48 -544 -112 -544
WIRE 96 -544 96 -656
WIRE 96 -544 16 -544
WIRE -496 -528 -496 -592
WIRE -624 -480 -624 -592
WIRE -496 -416 -496 -448
WIRE -432 -416 -496 -416
WIRE -304 -416 -368 -416
WIRE -112 -416 -112 -544
WIRE -112 -416 -224 -416
WIRE -48 -416 -112 -416
WIRE 96 -400 96 -544
WIRE 96 -400 16 -400
WIRE 112 -400 96 -400
WIRE -496 -384 -496 -416
WIRE -48 -384 -96 -384
WIRE -768 -336 -848 -336
WIRE -624 -336 -624 -400
WIRE -624 -336 -704 -336
WIRE -560 -336 -624 -336
WIRE -624 -320 -624 -336
WIRE -848 -304 -848 -336
WIRE -496 -288 -512 -288
WIRE -400 -288 -496 -288
WIRE -496 -272 -496 -288
WIRE -400 -272 -400 -288
WIRE -176 -224 -176 -240
WIRE -96 -224 -96 -384
WIRE -96 -224 -176 -224
WIRE -400 -192 -400 -208
WIRE -400 -192 -496 -192
WIRE -496 -176 -496 -192
FLAG -288 -576 +3V
FLAG -288 -496 0
FLAG -848 -224 0
FLAG -624 -240 0
FLAG -496 -176 0
FLAG -176 -320 +3V
FLAG -176 -144 0
FLAG -16 -368 0
FLAG -16 -432 +3V
FLAG -560 -592 +3V
SYMBOL voltage -288 -592 R0
WINDOW 123 24 44 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V1
SYMATTR Value 3
SYMBOL npn -560 -384 R0
SYMATTR InstName Q1
SYMATTR Value BC337-25
SYMBOL res -512 -544 R0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap -704 -352 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 4.7µ
SYMBOL voltage -848 -320 R0
WINDOW 123 24 44 Left 2
WINDOW 39 0 0 Left 2
WINDOW 3 -123 149 Left 2
SYMATTR Value2 AC 10m
SYMATTR Value SINE(0 1m 1000 0 0 0)
SYMATTR InstName V4
SYMBOL res -640 -496 R0
SYMATTR InstName R7
SYMATTR Value 40K
SYMBOL res -640 -336 R0
SYMATTR InstName R8
SYMATTR Value 10K
SYMBOL res -512 -288 R0
SYMATTR InstName R9
SYMATTR Value 100
SYMBOL cap -416 -272 R0
SYMATTR InstName C5
SYMATTR Value 4.7µ
SYMBOL cap -368 -432 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C6
SYMATTR Value 4.7µ
SYMBOL Opamps\\LT1677 -16 -464 R0
SYMATTR InstName U2
SYMBOL cap 16 -560 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 10p
SYMBOL res 32 -672 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R10
SYMATTR Value 500k
SYMBOL res -192 -336 R0
SYMATTR InstName R11
SYMATTR Value 10k
SYMBOL res -192 -240 R0
SYMATTR InstName R12
SYMATTR Value 10k
SYMBOL res -208 -432 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 50k
TEXT -896 -584 Left 2 !.tran 0 10m 0 1u
TEXT -896 -616 Left 2 !;ac dec 10000 1 20k