Version 4
SHEET 1 880 680
WIRE 336 0 -96 0
WIRE 560 0 336 0
WIRE 176 64 0 64
WIRE 288 64 256 64
WIRE 368 64 288 64
WIRE 592 64 448 64
WIRE 560 80 560 0
WIRE 336 96 336 0
WIRE 288 112 288 64
WIRE 304 112 288 112
WIRE 480 128 368 128
WIRE 496 128 480 128
WIRE 304 144 288 144
WIRE 176 192 96 192
WIRE 288 192 288 144
WIRE 288 192 256 192
WIRE 560 192 560 176
WIRE 592 192 592 64
WIRE 592 192 560 192
WIRE -96 208 -96 0
WIRE 0 208 0 64
WIRE 96 208 96 192
WIRE 288 208 288 192
WIRE 480 208 480 128
WIRE 560 208 560 192
WIRE -96 304 -96 288
WIRE 0 304 0 288
WIRE 0 304 -96 304
WIRE 48 304 0 304
WIRE 96 304 96 288
WIRE 96 304 48 304
WIRE 288 304 288 288
WIRE 288 304 96 304
WIRE 336 304 336 160
WIRE 336 304 288 304
WIRE 480 304 480 288
WIRE 480 304 336 304
WIRE 560 304 560 288
WIRE 560 304 480 304
WIRE 48 320 48 304
FLAG 48 320 0
SYMBOL res 464 192 R0
SYMATTR InstName R1
SYMATTR Value 47k
SYMBOL res 272 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R2
SYMATTR Value 4k7
SYMBOL res 464 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R3
SYMATTR Value 10k
SYMBOL res 272 176 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R4
SYMATTR Value 4k7
SYMBOL res 304 304 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL res 576 304 R180
WINDOW 0 36 76 Left 0
WINDOW 3 36 40 Left 0
SYMATTR InstName R6
SYMATTR Value 220
SYMBOL Opamps\\LT1006 336 64 R0
SYMATTR InstName U1
SYMBOL voltage 0 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value SINE(1 .1 100 0 0 0 100)
SYMBOL voltage 96 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 1.2
SYMBOL npn 496 80 R0
SYMATTR InstName Q1
SYMATTR Value BC547C
SYMBOL voltage -96 192 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 12
TEXT -130 344 Left 0 !.tran 1