Version 4
SHEET 1 1644 1316
WIRE -432 -448 -432 -512
WIRE -464 -432 -544 -432
WIRE -288 -416 -400 -416
WIRE -272 -416 -288 -416
WIRE -224 -416 -272 -416
WIRE -1728 -400 -1776 -400
WIRE -1360 -400 -1728 -400
WIRE -464 -400 -640 -400
WIRE -640 -320 -640 -400
WIRE -544 -320 -640 -320
WIRE -288 -320 -288 -416
WIRE -288 -320 -464 -320
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 -816 -304 -992 -304
WIRE -640 -288 -640 -320
WIRE -432 -272 -432 -384
WIRE -288 -272 -432 -272
WIRE -272 -272 -288 -272
WIRE 192 -256 128 -256
WIRE 416 -256 192 -256
WIRE -272 -240 -272 -272
WIRE -1456 -224 -1456 -304
WIRE 192 -224 192 -256
WIRE -1776 -208 -1776 -304
WIRE -1072 -192 -1072 -304
WIRE -992 -192 -992 -304
WIRE -640 -160 -640 -208
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 304 -64 272 -64
WIRE 464 -64 384 -64
WIRE -1072 -16 -1072 -64
WIRE 416 0 416 -256
WIRE 128 16 48 16
WIRE 272 16 272 -64
WIRE 272 16 208 16
WIRE 384 16 272 16
WIRE 464 32 464 -64
WIRE 464 32 448 32
WIRE 576 32 464 32
WIRE 624 32 576 32
WIRE 224 48 32 48
WIRE 336 48 304 48
WIRE 384 48 336 48
WIRE -1728 64 -1776 64
WIRE -1360 64 -1728 64
WIRE 624 64 624 32
WIRE 1072 64 1008 64
WIRE 336 80 336 48
WIRE 416 96 416 64
WIRE -432 144 -432 80
WIRE 1072 144 1072 64
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 -816 160 -992 160
WIRE -464 160 -544 160
WIRE -288 176 -400 176
WIRE -272 176 -288 176
WIRE -224 176 -272 176
WIRE 336 176 336 160
WIRE 624 176 624 144
WIRE -464 192 -640 192
WIRE -1456 240 -1456 160
WIRE 1072 240 1072 224
WIRE 1232 240 1232 224
WIRE 1376 240 1376 224
WIRE -1776 256 -1776 160
WIRE -1072 272 -1072 160
WIRE -992 272 -992 160
WIRE -640 272 -640 192
WIRE -544 272 -640 272
WIRE -288 272 -288 176
WIRE -288 272 -464 272
WIRE -640 304 -640 272
WIRE -432 320 -432 208
WIRE -288 320 -432 320
WIRE -272 320 -288 320
WIRE 192 336 128 336
WIRE 416 336 192 336
WIRE -272 352 -272 320
WIRE 192 368 192 336
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 -640 432 -640 384
WIRE -1072 448 -1072 400
WIRE -1744 496 -1776 496
WIRE -1360 496 -1744 496
WIRE 304 528 272 528
WIRE 464 528 384 528
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 416 592 416 336
WIRE 128 608 48 608
WIRE 272 608 272 528
WIRE 272 608 208 608
WIRE 384 608 272 608
WIRE 464 624 464 528
WIRE 464 624 448 624
WIRE 576 624 464 624
WIRE 624 624 576 624
WIRE -816 640 -816 592
WIRE 224 640 32 640
WIRE 336 640 304 640
WIRE 384 640 336 640
WIRE 624 656 624 624
WIRE -1456 672 -1456 592
WIRE 336 672 336 640
WIRE -1776 688 -1776 592
WIRE 416 688 416 656
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 336 768 336 752
WIRE 624 768 624 736
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 416 688 0
FLAG 624 768 0
FLAG 336 768 0
FLAG -1072 448 0
FLAG -1072 880 0
FLAG 48 608 low_r_amp_o
FLAG 576 624 r_out
FLAG 32 640 high_steady
FLAG -816 880 0
FLAG -704 752 high_steady
FLAG -816 160 low_r_pwm
FLAG 128 336 amp_on
FLAG 192 432 0
FLAG -544 160 low_r_pwm
FLAG -272 176 low_r_amp_o
FLAG -272 416 0
FLAG -640 432 0
FLAG -432 80 0
FLAG -288 320 amp_on
FLAG 1232 240 0
FLAG 1376 240 0
FLAG -1072 -16 0
FLAG -816 -304 low_gb_pwm
FLAG 416 96 0
FLAG 624 176 0
FLAG 336 176 0
FLAG 48 16 low_gb_amp_o
FLAG 576 32 gb_out
FLAG 32 48 high_steady
FLAG 128 -256 amp_on
FLAG 192 -160 0
FLAG -544 -432 low_gb_pwm
FLAG -272 -416 low_gb_amp_o
FLAG -272 -176 0
FLAG -640 -160 0
FLAG -432 -512 0
FLAG -288 -272 amp_on
FLAG 1072 240 0
FLAG 1008 64 amp_on
FLAG -1728 64 cath_r
FLAG -1728 -400 cath_gb
FLAG -1744 496 annode
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 608 640 R0
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL res 224 592 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 100k
SYMBOL res 320 624 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 100k
SYMBOL res 320 656 R0
SYMATTR InstName R4
SYMATTR Value 150k
SYMBOL res 400 512 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 176 368 R0
SYMATTR InstName C3
SYMATTR Value 0.1µ
SYMBOL res -624 400 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R15
SYMATTR Value 100k
SYMBOL res -448 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R16
SYMATTR Value 120k
SYMBOL cap -288 352 R0
SYMATTR InstName C4
SYMATTR Value 0.1µ
SYMBOL Opamps\\ADA4505 -432 240 M180
SYMATTR InstName U2
SYMBOL Opamps\\ADA4505 416 560 R0
SYMATTR InstName U4
SYMBOL voltage 1232 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 1.2V
SYMBOL voltage 1376 128 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 608 48 R0
SYMATTR InstName R19
SYMATTR Value 1Meg
SYMBOL res 224 0 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R20
SYMATTR Value 100k
SYMBOL res 320 32 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R21
SYMATTR Value 100k
SYMBOL res 320 64 R0
SYMATTR InstName R22
SYMATTR Value 150k
SYMBOL res 400 -80 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R23
SYMATTR Value 150k
SYMBOL cap 176 -224 R0
SYMATTR InstName C6
SYMATTR Value 0.1µ
SYMBOL res -624 -192 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R24
SYMATTR Value 100k
SYMBOL res -448 -336 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R25
SYMATTR Value 60k
SYMBOL cap -288 -240 R0
SYMATTR InstName C7
SYMATTR Value 0.1µ
SYMBOL Opamps\\ADA4505 -432 -352 M180
SYMATTR InstName U1
SYMBOL Opamps\\ADA4505 416 -32 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 1072 128 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V6
SYMATTR Value 3V
TEXT -1928 456 Left 2 !.tran 100m
TEXT -128 176 Left 2 ;1.8V -> 60k (<=70k)\n1.4V -> 120k (<=130k)
TEXT -128 -416 Left 2 ;1.8V -> 60k (<=70k)\n1.4V -> 120k (<=130k)