Version 4
SHEET 1 2580 1112
WIRE 1344 -400 1136 -400
WIRE 1472 -400 1344 -400
WIRE 1632 -400 1472 -400
WIRE 1344 -272 1344 -400
WIRE 1632 -272 1632 -320
WIRE 1136 -224 1136 -320
WIRE 1136 -224 1072 -224
WIRE 1280 -224 1136 -224
WIRE 1472 -224 1472 -400
WIRE 1376 -176 1344 -176
WIRE 1408 -176 1376 -176
WIRE 608 -160 544 -160
WIRE 768 -160 672 -160
WIRE 976 -160 848 -160
WIRE 1376 -160 1376 -176
WIRE 1072 -112 1072 -160
WIRE 1344 -112 1344 -176
WIRE 1344 -112 1184 -112
WIRE 544 -80 544 -160
WIRE 640 -80 544 -80
WIRE 1184 -80 1184 -112
WIRE 1424 -48 1280 -48
WIRE 1472 -48 1472 -128
WIRE 1472 -48 1424 -48
WIRE 1424 -16 1424 -48
WIRE -16 0 -16 -32
WIRE 96 0 96 -32
WIRE 1184 16 1184 0
WIRE 1280 16 1280 -48
WIRE 624 32 624 -32
WIRE 384 48 336 48
WIRE 544 48 544 -80
WIRE 544 48 464 48
WIRE 592 48 544 48
WIRE 720 64 720 -80
WIRE 720 64 656 64
WIRE 784 64 720 64
WIRE 912 64 864 64
WIRE 1008 64 912 64
WIRE 1072 64 1072 -48
WIRE 1120 64 1072 64
WIRE 592 80 512 80
WIRE 1072 80 1072 64
WIRE 1376 80 1376 -80
WIRE 1376 80 1344 80
WIRE 1424 80 1424 64
WIRE 1424 80 1376 80
WIRE 1520 80 1424 80
WIRE 1616 80 1520 80
WIRE 1696 80 1616 80
WIRE 1712 80 1696 80
WIRE 1808 80 1792 80
WIRE -16 112 -16 80
WIRE 96 112 96 80
WIRE 1008 128 1008 64
WIRE 1184 128 1184 112
WIRE 624 176 624 96
WIRE 1280 192 1280 160
WIRE 1344 192 1344 160
WIRE 1344 192 1280 192
WIRE 1424 192 1424 80
WIRE 1520 192 1520 160
WIRE 1344 208 1344 192
WIRE 976 240 976 -160
WIRE 1072 240 1072 176
WIRE 1072 240 976 240
WIRE 1072 272 1072 240
WIRE 1808 272 1808 160
WIRE 512 304 512 80
WIRE 768 304 512 304
WIRE 1344 304 1344 288
WIRE 1424 304 1424 256
WIRE 1424 304 1344 304
WIRE 1520 304 1520 256
WIRE 1520 304 1424 304
WIRE 768 320 768 304
WIRE 1424 336 1424 304
WIRE 1280 400 1280 192
WIRE 1280 400 768 400
FLAG 96 112 0
FLAG -16 112 0
FLAG -16 -32 +V
FLAG 96 -32 -V
FLAG 624 -32 +V
FLAG 624 176 -V
FLAG 1424 336 0
FLAG 1632 -272 0
FLAG 336 128 0
FLAG 1808 272 0
FLAG 1072 352 0
FLAG 912 128 0
FLAG 1184 208 0
FLAG 1616 144 0
FLAG 1696 144 0
SYMBOL voltage -16 -16 R0
SYMATTR InstName V1
SYMATTR Value 15
SYMBOL voltage 96 -16 R0
SYMATTR InstName V2
SYMATTR Value -15
SYMBOL opamps\\UniversalOpamp2 624 64 R0
WINDOW 38 12 24 Left 0
SYMATTR InstName U2
SYMATTR Value2 Avol=100k GBW=10Meg Slew=10Meg
SYMATTR SpiceLine ilimit=25m rail=0 Vos=0 phimargin=70
SYMBOL npn 1008 80 R0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res 1408 -32 R0
SYMATTR InstName R1
SYMATTR Value 0.1
SYMBOL res 1328 64 R0
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 1408 192 R0
SYMATTR InstName C1
SYMATTR Value 200n
SYMATTR SpiceLine Rser=0.005
SYMBOL res 1120 -416 R0
SYMATTR InstName R3
SYMATTR Value 2k
SYMBOL voltage 1632 -416 R0
WINDOW 123 0 0 Left 0
WINDOW 39 24 44 Left 0
SYMATTR SpiceLine Rser=0.5
SYMATTR InstName V4
SYMATTR Value 30
SYMBOL res 480 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 49 53 VTop 0
SYMATTR InstName R4
SYMATTR Value 1k
SYMBOL res 736 -96 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R7
SYMATTR Value 800k
SYMBOL cap 672 -176 R90
WINDOW 0 0 32 VBottom 0
WINDOW 3 32 32 VTop 0
SYMATTR InstName C3
SYMATTR Value 200p
SYMBOL res 1808 64 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R10
SYMATTR Value 1
SYMBOL npn 1408 -224 R0
SYMATTR InstName Q3
SYMATTR Value 2N3055
SYMBOL res 1360 -176 R0
SYMATTR InstName R12
SYMATTR Value 50
SYMBOL res 1328 192 R0
SYMATTR InstName R9
SYMATTR Value 10k
SYMBOL voltage 336 32 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V7
SYMATTR Value 3
SYMBOL res 1056 256 R0
SYMATTR InstName R15
SYMATTR Value 10
SYMBOL res 1504 64 R0
SYMATTR InstName R16
SYMATTR Value 0.05
SYMBOL cap 1504 192 R0
SYMATTR InstName C7
SYMATTR Value 2µ
SYMBOL cap 1264 96 R0
SYMATTR InstName C6
SYMATTR Value 20p
SYMBOL current 1808 80 R0
WINDOW 123 24 116 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value2 AC 1
SYMATTR InstName I1
SYMATTR Value PULSE(0.02 1 2m 100n 100n 2m 5m 2)
SYMBOL npn 1280 -272 R0
SYMATTR InstName Q1
SYMATTR Value QBD135-16/PLP
SYMBOL res 752 304 R0
SYMATTR InstName R5
SYMATTR Value 10
SYMBOL res 880 48 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 49 53 VTop 0
SYMATTR InstName R6
SYMATTR Value 50
SYMBOL diode 928 128 R180
WINDOW 0 24 72 Left 0
WINDOW 3 24 0 Left 0
SYMATTR InstName D1
SYMBOL res 864 -176 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 49 53 VTop 0
SYMATTR InstName R11
SYMATTR Value 2k
SYMBOL res 1264 0 R0
SYMATTR InstName R13
SYMATTR Value 10k
SYMBOL res 1168 -96 R0
WINDOW 0 40 23 Left 0
SYMATTR InstName R14
SYMATTR Value 1
SYMBOL diode 1056 -224 R0
SYMATTR InstName D3
SYMATTR Value 1N4148
SYMBOL pnp 1120 112 M180
SYMATTR InstName Q4
SYMATTR Value 2N2907
SYMBOL res 1168 112 R0
SYMATTR InstName R17
SYMATTR Value 2
SYMBOL cap 1600 80 R0
SYMATTR InstName C4
SYMATTR Value 1n
SYMATTR SpiceLine Rser=0.1
SYMBOL schottky 1056 -112 R0
SYMATTR InstName D2
SYMATTR Value 1N5817
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL cap 1680 80 R0
SYMATTR InstName C2
SYMATTR Value 1p
SYMATTR SpiceLine Rser=1m
TEXT 176 392 Left 0 !.ac oct 20 10 100Meg
TEXT 232 328 Left 0 !;tran 0 5m 1.5m