Version 4
SHEET 1 2316 680
WIRE 784 -96 736 -96
WIRE 896 -96 848 -96
WIRE 624 16 592 16
WIRE 736 16 736 -96
WIRE 736 16 704 16
WIRE 784 16 736 16
WIRE 896 16 896 -96
WIRE 896 16 864 16
WIRE 368 112 368 32
WIRE 800 160 800 128
WIRE 736 176 736 16
WIRE 768 176 736 176
WIRE 896 192 896 16
WIRE 896 192 832 192
WIRE 960 192 896 192
WIRE 112 208 0 208
WIRE 224 208 192 208
WIRE 320 208 320 176
WIRE 320 208 288 208
WIRE 448 208 368 208
WIRE 496 208 448 208
WIRE 592 208 592 16
WIRE 592 208 560 208
WIRE 624 208 592 208
WIRE 768 208 704 208
WIRE 960 224 960 192
WIRE 320 256 320 208
WIRE 448 256 448 208
WIRE 800 256 800 224
WIRE -320 272 -320 240
WIRE -192 272 -192 240
WIRE 0 272 0 208
WIRE 592 272 592 208
WIRE 320 352 320 336
WIRE 448 352 448 336
WIRE 448 352 320 352
WIRE 448 368 448 352
WIRE -320 384 -320 352
WIRE -192 384 -192 352
WIRE 0 384 0 352
WIRE 592 384 592 352
WIRE 960 384 960 304
WIRE 448 480 448 448
FLAG -320 384 0
FLAG -192 384 0
FLAG -320 240 +UB
FLAG -192 240 -UB
FLAG 800 128 +UB
FLAG 800 256 -UB
FLAG 0 384 0
FLAG 0 208 IN
FLAG 960 192 OUT
FLAG 960 384 0
FLAG 592 384 0
FLAG 368 32 +UB
FLAG 448 480 -UB
SYMBOL Opamps\\opamp2 800 128 R0
SYMATTR InstName U1
SYMATTR Value tl071_q
SYMBOL voltage -320 256 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 4.5
SYMBOL voltage -192 368 R180
WINDOW 0 24 96 Left 2
WINDOW 3 24 16 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 4.5
SYMBOL voltage 0 368 R180
WINDOW 0 24 96 Left 2
WINDOW 3 -361 -23 Left 2
WINDOW 123 24 -12 Left 2
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 1 10µ 100n 100n 30µ)
SYMATTR Value2 AC 1
SYMBOL res 944 208 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 208 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 600
SYMBOL res 720 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 220k
SYMBOL res 720 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 220k
SYMBOL res 880 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 220k
SYMBOL cap 848 -112 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 47p
SYMBOL res 576 256 R0
SYMATTR InstName R6
SYMATTR Value 1Meg
SYMBOL njf 320 112 R0
SYMATTR InstName J1
SYMATTR Value J2N5457
SYMBOL cap 288 192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 10n
SYMBOL cap 560 192 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 220n
SYMBOL res 304 240 R0
SYMATTR InstName R7
SYMATTR Value 1Meg
SYMBOL res 432 240 R0
SYMATTR InstName R8
SYMATTR Value 4.7k
SYMBOL res 432 352 R0
SYMATTR InstName R9
SYMATTR Value 4.7k
TEXT -320 440 Left 2 !.include TL071_Qlevel.SUB
TEXT 40 432 Left 2 !.tran 50µ
TEXT -320 512 Left 2 !.noise V[OUT] V3 dec 20 20 20k
TEXT -320 544 Left 2 !;ac dec 100 1 1MEG
TEXT -320 616 Left 0 !.MODEL J2N5457 NJF(Beta=1.125m Betatce=-500m Rd=1 Rs=1 Lambda=2.3m Vto=-1.372 Vtotc=-2.5m Is=181.3f Isr=1.747p N=1 Nr=2 Xti=3 Alpha=2.543u Vk=152.2 Cgd=4p M=311.4m Pb=500m Fc=500m Cgs=4.627p Kf=1.045e-002f Af=1)
TEXT -312 600 Left 2 ;http://ltwiki.org/index.php?title=Standard.jft