Version 4
SHEET 1 1644 1316
WIRE 48 -512 -16 -512
WIRE 272 -512 48 -512
WIRE 48 -480 48 -512
WIRE -1728 -400 -1776 -400
WIRE -1360 -400 -1728 -400
WIRE 160 -368 128 -368
WIRE 320 -368 240 -368
WIRE -576 -320 -576 -384
WIRE -1776 -304 -1776 -400
WIRE -1712 -304 -1776 -304
WIRE -1456 -304 -1632 -304
WIRE -1360 -304 -1360 -400
WIRE -1296 -304 -1360 -304
WIRE -1168 -304 -1216 -304
WIRE -1072 -304 -1104 -304
WIRE -992 -304 -1072 -304
WIRE -896 -304 -992 -304
WIRE -608 -304 -896 -304
WIRE 272 -304 272 -512
WIRE -432 -288 -544 -288
WIRE -416 -288 -432 -288
WIRE -16 -288 -416 -288
WIRE 128 -288 128 -368
WIRE 128 -288 64 -288
WIRE 240 -288 128 -288
WIRE -608 -272 -784 -272
WIRE 320 -272 320 -368
WIRE 320 -272 304 -272
WIRE 432 -272 320 -272
WIRE 480 -272 432 -272
WIRE 80 -256 -112 -256
WIRE 192 -256 160 -256
WIRE 240 -256 192 -256
WIRE -1456 -224 -1456 -304
WIRE 192 -224 192 -256
WIRE -1776 -208 -1776 -304
WIRE 272 -208 272 -240
WIRE -1072 -192 -1072 -304
WIRE -992 -192 -992 -304
WIRE -784 -192 -784 -272
WIRE -688 -192 -784 -192
WIRE -432 -192 -432 -288
WIRE -432 -192 -608 -192
WIRE -784 -160 -784 -192
WIRE -576 -144 -576 -256
WIRE -432 -144 -576 -144
WIRE -416 -144 -432 -144
WIRE 192 -128 192 -144
WIRE -416 -112 -416 -144
WIRE -1776 -64 -1776 -128
WIRE -1456 -64 -1456 -160
WIRE -1456 -64 -1776 -64
WIRE -1072 -64 -1072 -128
WIRE -1072 -64 -1456 -64
WIRE -992 -64 -992 -112
WIRE -992 -64 -1072 -64
WIRE -784 -32 -784 -80
WIRE 48 -32 -16 -32
WIRE 272 -32 48 -32
WIRE -1072 -16 -1072 -64
WIRE 48 0 48 -32
WIRE -1728 64 -1776 64
WIRE -1360 64 -1728 64
WIRE 160 96 128 96
WIRE 320 96 240 96
WIRE -576 144 -576 80
WIRE -1776 160 -1776 64
WIRE -1712 160 -1776 160
WIRE -1456 160 -1632 160
WIRE -1360 160 -1360 64
WIRE -1296 160 -1360 160
WIRE -1168 160 -1216 160
WIRE -1072 160 -1104 160
WIRE -992 160 -1072 160
WIRE -896 160 -992 160
WIRE -608 160 -896 160
WIRE 272 160 272 -32
WIRE -432 176 -544 176
WIRE -416 176 -432 176
WIRE -16 176 -416 176
WIRE 128 176 128 96
WIRE 128 176 64 176
WIRE 240 176 128 176
WIRE -608 192 -784 192
WIRE 320 192 320 96
WIRE 320 192 304 192
WIRE 432 192 320 192
WIRE 480 192 432 192
WIRE 80 208 -112 208
WIRE 192 208 160 208
WIRE 240 208 192 208
WIRE -1456 240 -1456 160
WIRE 192 240 192 208
WIRE -1776 256 -1776 160
WIRE 272 256 272 224
WIRE -1072 272 -1072 160
WIRE -992 272 -992 160
WIRE -784 272 -784 192
WIRE -688 272 -784 272
WIRE -432 272 -432 176
WIRE -432 272 -608 272
WIRE -784 304 -784 272
WIRE -576 320 -576 208
WIRE -432 320 -576 320
WIRE -416 320 -432 320
WIRE 192 336 192 320
WIRE -416 352 -416 320
WIRE -1776 400 -1776 336
WIRE -1456 400 -1456 304
WIRE -1456 400 -1776 400
WIRE -1072 400 -1072 336
WIRE -1072 400 -1456 400
WIRE -992 400 -992 352
WIRE -992 400 -1072 400
WIRE -784 432 -784 384
WIRE -1072 448 -1072 400
WIRE -1744 496 -1776 496
WIRE -1360 496 -1744 496
WIRE -1776 592 -1776 496
WIRE -1712 592 -1776 592
WIRE -1456 592 -1632 592
WIRE -1360 592 -1360 496
WIRE -1296 592 -1360 592
WIRE -1168 592 -1216 592
WIRE -1072 592 -1104 592
WIRE -816 592 -1072 592
WIRE -240 608 -304 608
WIRE -816 640 -816 592
WIRE -1456 672 -1456 592
WIRE -1776 688 -1776 592
WIRE -240 688 -240 608
WIRE -1072 704 -1072 592
WIRE -816 752 -816 720
WIRE -704 752 -816 752
WIRE -640 752 -704 752
WIRE -816 768 -816 752
WIRE -240 784 -240 768
WIRE -80 784 -80 768
WIRE 64 784 64 768
WIRE -1776 832 -1776 768
WIRE -1456 832 -1456 736
WIRE -1456 832 -1776 832
WIRE -1072 832 -1072 768
WIRE -1072 832 -1456 832
WIRE -1072 880 -1072 832
WIRE -816 880 -816 848
FLAG 272 256 0
FLAG 192 336 0
FLAG -1072 448 0
FLAG -1072 880 0
FLAG 432 192 r_out
FLAG -112 208 high_steady
FLAG -816 880 0
FLAG -704 752 high_steady
FLAG -16 -32 amp_on
FLAG 48 64 0
FLAG -416 176 low_r_amp_o
FLAG -416 416 0
FLAG -784 432 0
FLAG -576 80 0
FLAG -432 320 amp_on
FLAG -80 784 0
FLAG 64 784 0
FLAG -1072 -16 0
FLAG 272 -208 0
FLAG 192 -128 0
FLAG 432 -272 gb_out
FLAG -112 -256 high_steady
FLAG -16 -512 amp_on
FLAG 48 -416 0
FLAG -416 -288 low_gb_amp_o
FLAG -416 -48 0
FLAG -784 -32 0
FLAG -576 -384 0
FLAG -432 -144 amp_on
FLAG -240 784 0
FLAG -304 608 amp_on
FLAG -1728 64 cath_r
FLAG -1728 -400 cath_gb
FLAG -1744 496 annode
FLAG -896 -304 low_gb_pwm
FLAG -896 160 low_r_pwm
SYMBOL voltage -1776 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value PULSE(0 1.4 10m 0 0 150u 250u 50)
SYMBOL res 80 160 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 176 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL res 176 224 R0
SYMATTR InstName R4
SYMATTR Value 150k
SYMBOL res 256 80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 150k
SYMBOL voltage -1776 672 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value PULSE(0 4.1 0 0 0 40m 1)
SYMBOL res -1616 176 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R7
SYMATTR Value 1R
SYMBOL diode -1472 240 R0
SYMATTR InstName D1
SYMATTR Value 1N914
SYMATTR Description Light Emitting Diode
SYMATTR Type led
SYMBOL res -1616 608 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R10
SYMATTR Value 1R
SYMBOL diode -1472 672 R0
SYMATTR InstName D3
SYMATTR Value 1N914
SYMATTR Description Light Emitting Diode
SYMATTR Type led
SYMBOL cap -1088 272 R0
SYMATTR InstName C1
SYMATTR Value 47n
SYMBOL schottky -1168 176 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D2
SYMATTR Value RB481Y
SYMBOL res -1008 256 R0
SYMATTR InstName R6
SYMATTR Value 50k
SYMBOL res -1200 176 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R8
SYMATTR Value 220R
SYMBOL cap -1088 704 R0
SYMATTR InstName C2
SYMATTR Value 47n
SYMBOL schottky -1168 608 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D4
SYMATTR Value RB481Y
SYMBOL res -1200 608 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R11
SYMATTR Value 220R
SYMBOL res -832 624 R0
SYMATTR InstName R12
SYMATTR Value 13kR
SYMBOL res -832 752 R0
SYMATTR InstName R13
SYMATTR Value 50kR
SYMBOL cap 32 0 R0
SYMATTR InstName C3
SYMATTR Value 0.1µ
SYMBOL res -768 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R15
SYMATTR Value 100k
SYMBOL res -592 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R16
SYMATTR Value 120k
SYMBOL cap -432 352 R0
SYMATTR InstName C4
SYMATTR Value 0.1µ
SYMBOL Opamps\\ADA4505 -576 240 M180
SYMATTR InstName U2
SYMBOL Opamps\\ADA4505 272 128 R0
SYMATTR InstName U4
SYMBOL voltage -80 672 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1.2V
SYMBOL voltage 64 672 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value 1.6V
SYMBOL res -1616 -288 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R14
SYMATTR Value 1R
SYMBOL diode -1472 -224 R0
SYMATTR InstName D5
SYMATTR Value 1N914
SYMATTR Description Light Emitting Diode
SYMATTR Type led
SYMBOL cap -1088 -192 R0
SYMATTR InstName C5
SYMATTR Value 47n
SYMBOL schottky -1168 -288 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D6
SYMATTR Value RB481Y
SYMBOL res -1008 -208 R0
SYMATTR InstName R17
SYMATTR Value 50k
SYMBOL res -1200 -288 M270
WINDOW 0 32 56 VTop 2
WINDOW 3 0 56 VBottom 2
SYMATTR InstName R18
SYMATTR Value 220R
SYMBOL res 80 -304 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R20
SYMATTR Value 100k
SYMBOL res 176 -272 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R21
SYMATTR Value 100k
SYMBOL res 176 -240 R0
SYMATTR InstName R22
SYMATTR Value 150k
SYMBOL res 256 -384 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R23
SYMATTR Value 150k
SYMBOL cap 32 -480 R0
SYMATTR InstName C6
SYMATTR Value 0.1µ
SYMBOL res -768 -64 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R24
SYMATTR Value 100k
SYMBOL res -592 -208 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R25
SYMATTR Value 60k
SYMBOL cap -432 -112 R0
SYMATTR InstName C7
SYMATTR Value 0.1µ
SYMBOL Opamps\\ADA4505 -576 -224 M180
SYMATTR InstName U1
SYMBOL Opamps\\ADA4505 272 -336 R0
SYMATTR InstName U3
SYMBOL voltage -1776 -224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V5
SYMATTR Value PULSE(0 1.8 10m 0 0 150u 250u 50)
SYMBOL voltage -240 672 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V6
SYMATTR Value 3V
TEXT -1784 888 Left 2 !.tran 60m
TEXT -704 368 Left 2 ;1.8V -> 60k (<=70k)\n1.4V -> 120k (<=130k)
TEXT -712 -96 Left 2 ;1.8V -> 60k (<=70k)\n1.4V -> 120k (<=130k)