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path: root/doc/quick-tech-report/photolink_schematic.sch
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EESchema Schematic File Version 4
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L Transistor_BJT:BC847 Q1
U 1 1 5FC67B72
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F 0 "Q1" H 3641 3300 50  0000 L CNN
F 1 "BC847" H 3641 3255 50  0001 L CNN
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F 3 "http://www.infineon.com/dgdl/Infineon-BC847SERIES_BC848SERIES_BC849SERIES_BC850SERIES-DS-v01_01-en.pdf?fileId=db3a304314dca389011541d4630a1657" H 3450 3300 50  0001 L CNN
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F 3 "~" H 3050 3300 50  0001 C CNN
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F 1 "GND1" H 3555 3327 50  0000 C CNN
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Wire Wire Line
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Connection ~ 4600 2650
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RX_OUT
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F 1 "+3V3" H 3565 2323 50  0000 C CNN
F 2 "" H 3550 2150 50  0001 C CNN
F 3 "" H 3550 2150 50  0001 C CNN
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L Device:Opamp_Quad_Generic U1
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F 0 "U1" H 5250 4375 50  0000 C CNN
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F 2 "" H 5250 4650 50  0001 C CNN
F 3 "~" H 5250 4650 50  0001 C CNN
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F 1 "R" H 3620 2355 50  0001 L CNN
F 2 "" V 3480 2400 50  0001 C CNN
F 3 "~" H 3550 2400 50  0001 C CNN
	1    3550 2400
	1    0    0    -1  
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L Device:Opamp_Quad_Generic U1
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F 0 "U1" H 7200 2975 50  0000 C CNN
F 1 "MCP6494" H 7200 2974 50  0001 C CNN
F 2 "" H 7200 3250 50  0001 C CNN
F 3 "~" H 7200 3250 50  0001 C CNN
	2    7200 3250
	1    0    0    1   
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$Comp
L Device:Opamp_Quad_Generic U1
U 1 1 5FC6A2B7
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F 0 "U1" H 5050 2783 50  0000 C CNN
F 1 "MCP6494" H 5050 2874 50  0000 C CNN
F 2 "" H 5050 3150 50  0001 C CNN
F 3 "~" H 5050 3150 50  0001 C CNN
	1    5050 3150
	1    0    0    1   
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Wire Wire Line
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F 1 "D_ALT" V 3505 2720 50  0001 R CNN
F 2 "" H 3550 2800 50  0001 C CNN
F 3 "~" H 3550 2800 50  0001 C CNN
	1    3550 2800
	0    -1   -1   0   
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Wire Wire Line
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F 1 "D_ALT" V 4105 2720 50  0001 R CNN
F 2 "" H 4150 2800 50  0001 C CNN
F 3 "~" H 4150 2800 50  0001 C CNN
	1    4150 2800
	0    1    1    0   
$EndComp
Wire Wire Line
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Wire Wire Line
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F 1 "R" H 4420 4455 50  0001 L CNN
F 2 "" V 4280 4500 50  0001 C CNN
F 3 "~" H 4350 4500 50  0001 C CNN
	1    4350 4500
	1    0    0    -1  
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$Comp
L Device:R R4
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P 4350 5000
F 0 "R4" H 4420 5000 50  0000 L CNN
F 1 "R" H 4420 4955 50  0001 L CNN
F 2 "" V 4280 5000 50  0001 C CNN
F 3 "~" H 4350 5000 50  0001 C CNN
	1    4350 5000
	1    0    0    -1  
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P 4650 5000
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F 1 "C" H 4765 4955 50  0001 L CNN
F 2 "" H 4688 4850 50  0001 C CNN
F 3 "~" H 4650 5000 50  0001 C CNN
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 4350 4750
Wire Wire Line
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L power:GND2 #PWR05
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F 1 "GND2" H 4355 5127 50  0000 C CNN
F 2 "" H 4350 5300 50  0001 C CNN
F 3 "" H 4350 5300 50  0001 C CNN
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 4350 5250
Wire Wire Line
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L power:+3V0 #PWR04
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P 4350 4250
F 0 "#PWR04" H 4350 4100 50  0001 C CNN
F 1 "+3V0" H 4365 4423 50  0000 C CNN
F 2 "" H 4350 4250 50  0001 C CNN
F 3 "" H 4350 4250 50  0001 C CNN
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Wire Wire Line
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Connection ~ 4650 4750
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 5700 4650
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F 1 "100k" V 4934 2650 50  0000 C CNN
F 2 "" V 4980 2650 50  0001 C CNN
F 3 "~" H 5050 2650 50  0001 C CNN
	1    5050 2650
	0    1    1    0   
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F 1 "7p" V 5211 2300 50  0000 C CNN
F 2 "" H 5088 2150 50  0001 C CNN
F 3 "~" H 5050 2300 50  0001 C CNN
	1    5050 2300
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$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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$Comp
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F 1 "1k" V 6034 3150 50  0000 C CNN
F 2 "" V 6080 3150 50  0001 C CNN
F 3 "~" H 6150 3150 50  0001 C CNN
	1    6150 3150
	0    1    1    0   
$EndComp
$Comp
L Device:R R7
U 1 1 5FCB995A
P 7200 2700
F 0 "R7" V 6993 2700 50  0000 C CNN
F 1 "100k" V 7084 2700 50  0000 C CNN
F 2 "" V 7130 2700 50  0001 C CNN
F 3 "~" H 7200 2700 50  0001 C CNN
	1    7200 2700
	0    1    1    0   
$EndComp
Wire Wire Line
	5600 3150 5500 3150
Connection ~ 5500 3150
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
	5200 2650 5500 2650
Connection ~ 5500 2650
Wire Wire Line
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$Comp
L power:+3V0 #PWR03
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F 0 "#PWR03" H 4150 2000 50  0001 C CNN
F 1 "+3V0" H 4165 2323 50  0000 C CNN
F 2 "" H 4150 2150 50  0001 C CNN
F 3 "" H 4150 2150 50  0001 C CNN
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$EndComp
Wire Wire Line
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F 2 "" H 3850 2775 50  0001 C CNN
F 3 "~" H 3850 2775 50  0001 C CNN
	1    3850 2775
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F 2 "" H 3850 2850 50  0001 C CNN
F 3 "~" H 3850 2850 50  0001 C CNN
	1    3850 2850
	1    0    0    -1  
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Wire Notes Line
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Text Notes 2900 2700 0    50   ~ 0
IR link
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Notes Line
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Text Notes 3750 1750 2    100  ~ 0
Stator
Text Notes 3950 1750 0    100  ~ 0
Rotor
Text Label 5650 3750 2    50   ~ 0
VGND
Text Notes 5300 1950 2    50   ~ 0
TIA G=100kΩ
Text Notes 7500 2350 2    50   ~ 0
Amplifier G=100
Text Notes 8950 2900 2    50   ~ 0
Comparator
Text Notes 5650 4000 2    50   ~ 0
Virtual Ground Buffer
$Comp
L Device:C C3
U 1 1 5FC76733
P 5750 3150
F 0 "C3" V 5900 3150 50  0000 C CNN
F 1 "7p" V 5911 3150 50  0001 C CNN
F 2 "" H 5788 3000 50  0001 C CNN
F 3 "~" H 5750 3150 50  0001 C CNN
	1    5750 3150
	0    1    1    0   
$EndComp
Wire Wire Line
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Wire Wire Line
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Connection ~ 6650 3750
$Comp
L Device:Opamp_Quad_Generic U1
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P 8750 3350
F 0 "U1" H 8750 3075 50  0000 C CNN
F 1 "MCP6494" H 8750 3074 50  0001 C CNN
F 2 "" H 8750 3350 50  0001 C CNN
F 3 "~" H 8750 3350 50  0001 C CNN
	3    8750 3350
	1    0    0    1   
$EndComp
$Comp
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F 1 "7p" V 8011 3250 50  0001 C CNN
F 2 "" H 7888 3100 50  0001 C CNN
F 3 "~" H 7850 3250 50  0001 C CNN
	1    7850 3250
	0    1    1    0   
$EndComp
$Comp
L Device:R R8
U 1 1 5FC9BACD
P 6400 3400
F 0 "R8" V 6300 3400 50  0000 C CNN
F 1 "1k" V 6284 3400 50  0001 C CNN
F 2 "" V 6330 3400 50  0001 C CNN
F 3 "~" H 6400 3400 50  0001 C CNN
	1    6400 3400
	-1   0    0    1   
$EndComp
Wire Wire Line
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Connection ~ 5950 3750
Wire Wire Line
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Connection ~ 6400 3750
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Connection ~ 6400 3150
Wire Wire Line
	6400 3150 6900 3150
Wire Wire Line
	6400 3150 6400 2700
Wire Wire Line
	6000 3150 5900 3150
$Comp
L Device:R R9
U 1 1 5FCAEC24
P 8100 3500
F 0 "R9" V 8000 3500 50  0000 C CNN
F 1 "100k" V 7984 3500 50  0001 C CNN
F 2 "" V 8030 3500 50  0001 C CNN
F 3 "~" H 8100 3500 50  0001 C CNN
	1    8100 3500
	-1   0    0    1   
$EndComp
Wire Wire Line
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Connection ~ 7600 3250
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
	8350 3450 8350 3750
Wire Wire Line
	8100 3350 8100 3250
Connection ~ 8100 3250
Wire Wire Line
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Connection ~ 8100 3750
Wire Wire Line
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Wire Wire Line
	8100 3650 8100 3750
Wire Wire Line
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Text Notes 5700 3750 0    50   ~ 0
1/2 VCC = 1.5V
$EndSCHEMATC