Version 4
SHEET 1 896 680
WIRE 384 -368 -192 -368
WIRE -192 -336 -192 -368
WIRE -80 -304 -80 -320
WIRE -672 -240 -768 -240
WIRE -400 -240 -592 -240
WIRE -272 -240 -320 -240
WIRE -192 -240 -192 -272
WIRE -192 -240 -272 -240
WIRE -128 -240 -192 -240
WIRE -80 -192 -80 -208
WIRE -192 -176 -192 -240
WIRE 112 -112 112 -128
WIRE -80 -80 -80 -128
WIRE 96 -80 -80 -80
WIRE 384 -80 384 -368
WIRE 384 -80 160 -80
WIRE 464 -80 384 -80
WIRE 384 -64 384 -80
WIRE -576 -48 -576 -64
WIRE -448 -48 -448 -64
WIRE 128 -32 128 -48
WIRE -80 0 -80 -80
WIRE 272 16 272 0
WIRE 384 32 384 16
WIRE 384 32 304 32
WIRE -576 48 -576 32
WIRE -448 48 -448 32
WIRE 0 48 -16 48
WIRE 32 48 0 48
WIRE 144 48 112 48
WIRE 240 48 144 48
WIRE 384 48 384 32
WIRE 0 64 0 48
WIRE 336 64 304 64
WIRE 272 96 272 80
WIRE -80 112 -80 96
WIRE 384 128 384 112
WIRE 0 144 0 128
WIRE 144 160 144 48
WIRE 192 160 144 160
WIRE 336 160 336 64
WIRE 336 160 256 160
WIRE -80 208 -80 192
WIRE -192 240 -192 -96
WIRE 64 240 -192 240
WIRE 336 240 336 160
WIRE 336 240 144 240
WIRE -192 256 -192 240
WIRE -192 336 -192 320
FLAG -448 48 0
FLAG 272 96 +V
FLAG -448 -64 +V
FLAG -576 48 0
FLAG -576 -64 -V
FLAG 112 -128 +V
FLAG 128 -32 -V
FLAG -80 -320 +V
FLAG -80 208 -V
FLAG 384 128 0
FLAG 0 144 0
FLAG -192 336 0
FLAG -768 -240 0
FLAG 272 0 0
FLAG 464 -80 OUT
FLAG -272 -240 IN
SYMBOL voltage -448 -64 R0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL voltage -576 -64 R0
SYMATTR InstName V2
SYMATTR Value -5
SYMBOL opamps\\LTC1052 272 112 R180
WINDOW 0 -30 120 Right 2
WINDOW 3 12 28 Left 2
SYMATTR InstName U1
SYMBOL njf -128 -304 R0
SYMATTR InstName J1
SYMATTR Value 2N5486
SYMBOL diode -96 -192 R0
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL opamps\\LT1010 128 -144 R0
SYMATTR InstName U2
SYMBOL npn -16 0 M0
SYMATTR InstName Q1
SYMATTR Value 2N2222
SYMBOL res -96 208 M180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R3
SYMATTR Value 100
SYMBOL cap 368 112 M180
WINDOW 0 24 64 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C1
SYMATTR Value .1µ
SYMBOL res 368 -80 R0
SYMATTR InstName R1
SYMATTR Value 10Meg
SYMBOL cap 256 144 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 2000p
SYMBOL res 16 32 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10K
SYMBOL cap -16 128 M180
WINDOW 0 24 64 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C3
SYMATTR Value .01µ
SYMBOL res -208 -192 R0
SYMATTR InstName R4
SYMATTR Value 10Meg
SYMBOL voltage -576 -240 R90
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 V3
SYMATTR Value PULSE(-100m 100m 0 10n 10n 1u 2u)
SYMBOL res 48 224 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 1K
SYMBOL cap -208 320 M180
WINDOW 0 27 54 Left 2
WINDOW 3 24 8 Left 2
SYMATTR InstName C4
SYMATTR Value .1µ
SYMBOL res -304 -256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10K
SYMBOL cap -208 -336 R0
SYMATTR InstName C5
SYMATTR Value 30p
TEXT 424 216 Left 2 !.tran 250u
TEXT -88 -376 Bottom 2 ;DC Stabilized FET Probe