EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 3 6
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text HLabel 2800 1600 0    60   Input ~ 0
CurrentIn
Text HLabel 4000 2850 3    60   Output ~ 0
TriOut
Wire Wire Line
	2800 1600 2950 1600
Wire Wire Line
	2950 1600 2950 2300
$Comp
L power:GND #PWR031
U 1 1 5B996D17
P 2300 2300
F 0 "#PWR031" H 2300 2050 50  0001 C CNN
F 1 "GND" H 2300 2150 50  0000 C CNN
F 2 "" H 2300 2300 50  0001 C CNN
F 3 "" H 2300 2300 50  0001 C CNN
	1    2300 2300
	0    1    1    0   
$EndComp
Wire Wire Line
	2350 2300 2300 2300
NoConn ~ 1300 3750
NoConn ~ 900  3650
$Comp
L Device:R R8
U 1 1 5B996E92
P 1850 2300
F 0 "R8" V 1930 2300 50  0000 C CNN
F 1 "10k" V 1850 2300 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1780 2300 50  0001 C CNN
F 3 "" H 1850 2300 50  0001 C CNN
	1    1850 2300
	1    0    0    -1  
$EndComp
$Comp
L power:+VDC #PWR032
U 1 1 5B996FD6
P 3500 4350
F 0 "#PWR032" H 3500 4250 50  0001 C CNN
F 1 "+VDC" H 3500 4600 50  0000 C CNN
F 2 "" H 3500 4350 50  0001 C CNN
F 3 "" H 3500 4350 50  0001 C CNN
	1    3500 4350
	1    0    0    -1  
$EndComp
$Comp
L power:-VDC #PWR033
U 1 1 5B996FF6
P 3500 5250
F 0 "#PWR033" H 3500 5150 50  0001 C CNN
F 1 "-VDC" H 3500 5500 50  0000 C CNN
F 2 "" H 3500 5250 50  0001 C CNN
F 3 "" H 3500 5250 50  0001 C CNN
	1    3500 5250
	-1   0    0    1   
$EndComp
Wire Wire Line
	2950 2400 2950 2600
Wire Wire Line
	2950 2600 3050 2600
Connection ~ 3050 2600
Wire Wire Line
	4000 2500 3900 2500
$Comp
L power:GND #PWR034
U 1 1 5B997064
P 3200 2350
F 0 "#PWR034" H 3200 2100 50  0001 C CNN
F 1 "GND" H 3200 2200 50  0000 C CNN
F 2 "" H 3200 2350 50  0001 C CNN
F 3 "" H 3200 2350 50  0001 C CNN
	1    3200 2350
	-1   0    0    1   
$EndComp
Wire Wire Line
	3200 2350 3200 2400
Wire Wire Line
	3200 2400 3300 2400
Text HLabel 3350 700  0    60   Input ~ 0
SyncIn
Connection ~ 4000 2500
$Comp
L power:GND #PWR028
U 1 1 5B997C25
P 1850 2100
F 0 "#PWR028" H 1850 1850 50  0001 C CNN
F 1 "GND" H 1850 1950 50  0000 C CNN
F 2 "" H 1850 2100 50  0001 C CNN
F 3 "" H 1850 2100 50  0001 C CNN
	1    1850 2100
	-1   0    0    1   
$EndComp
Wire Wire Line
	1850 2100 1850 2150
Wire Wire Line
	1850 2450 1850 2500
Wire Wire Line
	1850 2500 2350 2500
Connection ~ 1850 2500
Connection ~ 4000 1800
Connection ~ 3050 1800
NoConn ~ 2350 2400
Wire Wire Line
	3050 2600 3300 2600
Wire Wire Line
	4000 1800 4000 2500
Wire Wire Line
	3050 1800 3050 2600
Wire Wire Line
	3500 700  3500 900 
Wire Wire Line
	3050 1200 3050 1800
Wire Wire Line
	4000 1200 4000 1800
$Comp
L Amplifier_Operational:LM13700 U2
U 5 1 5CA7AF1F
P 2250 4800
F 0 "U2" H 2208 4846 50  0000 L CNN
F 1 "LM13700" H 2208 4755 50  0000 L CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 1950 4825 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 1950 4825 50  0001 C CNN
	5    2250 4800
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:LM13700 U2
U 2 1 5CA7AF88
P 1200 3650
F 0 "U2" H 1100 3998 50  0000 C CNN
F 1 "LM13700" H 1100 3907 50  0000 C CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 900 3675 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 900 3675 50  0001 C CNN
	2    1200 3650
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:LM13700 U2
U 1 1 5CA7AFF3
P 2650 2400
F 0 "U2" H 2650 2033 50  0000 C CNN
F 1 "LM13700" H 2650 2124 50  0000 C CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 2350 2425 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 2350 2425 50  0001 C CNN
	1    2650 2400
	1    0    0    1   
$EndComp
$Comp
L power:+VDC #PWR029
U 1 1 5B996DDC
P 2150 4350
F 0 "#PWR029" H 2150 4250 50  0001 C CNN
F 1 "+VDC" H 2150 4600 50  0000 C CNN
F 2 "" H 2150 4350 50  0001 C CNN
F 3 "" H 2150 4350 50  0001 C CNN
	1    2150 4350
	1    0    0    -1  
$EndComp
$Comp
L power:-VDC #PWR030
U 1 1 5B996DC4
P 2150 5250
F 0 "#PWR030" H 2150 5150 50  0001 C CNN
F 1 "-VDC" H 2150 5500 50  0000 C CNN
F 2 "" H 2150 5250 50  0001 C CNN
F 3 "" H 2150 5250 50  0001 C CNN
	1    2150 5250
	-1   0    0    1   
$EndComp
Wire Wire Line
	2150 5250 2150 5200
Wire Wire Line
	2150 4500 2150 4400
$Comp
L Amplifier_Operational:TL072 U3
U 1 1 5CA964A8
P 3600 2500
F 0 "U3" H 3600 2867 50  0000 C CNN
F 1 "TL072" H 3600 2776 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3600 2500 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3600 2500 50  0001 C CNN
	1    3600 2500
	1    0    0    -1  
$EndComp
$Comp
L Amplifier_Operational:TL072 U3
U 3 1 5CA96502
P 3600 4800
F 0 "U3" H 3558 4846 50  0000 L CNN
F 1 "TL072" H 3558 4755 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 3600 4800 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 3600 4800 50  0001 C CNN
	3    3600 4800
	1    0    0    -1  
$EndComp
$Comp
L Device:R R9
U 1 1 5CD3E862
P 1850 2750
F 0 "R9" V 1930 2750 50  0000 C CNN
F 1 "100k" V 1850 2750 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 1780 2750 50  0001 C CNN
F 3 "" H 1850 2750 50  0001 C CNN
	1    1850 2750
	1    0    0    -1  
$EndComp
Wire Wire Line
	1850 2900 1850 3750
$Comp
L Device:Q_NJFET_DSG Q2
U 1 1 5D285A18
P 3500 1100
F 0 "Q2" V 3735 1100 50  0000 C CNN
F 1 "J113" V 3826 1100 50  0000 C CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 3700 1200 50  0001 C CNN
F 3 "~" H 3500 1100 50  0001 C CNN
	1    3500 1100
	0    1    1    0   
$EndComp
Wire Wire Line
	3700 1200 4000 1200
Wire Wire Line
	3300 1200 3050 1200
$Comp
L Device:C C18
U 1 1 5D03E2FC
P 3500 1800
F 0 "C18" V 3248 1800 50  0000 C CNN
F 1 "2.2nF PPS" V 3339 1800 50  0000 C CNN
F 2 "Capacitor_SMD:C_0805_2012Metric" H 3538 1650 50  0001 C CNN
F 3 "~" H 3500 1800 50  0001 C CNN
	1    3500 1800
	0    1    1    0   
$EndComp
Wire Wire Line
	3050 1800 3350 1800
Wire Wire Line
	3650 1800 4000 1800
Wire Wire Line
	1850 2500 1850 2600
Text HLabel 6600 4350 2    50   Output ~ 0
SqrOut
Wire Wire Line
	4000 2500 4000 2850
$Comp
L Transistor_BJT:MMBT3904 Q12
U 1 1 5FEDCEEA
P 4350 950
F 0 "Q12" H 4541 996 50  0000 L CNN
F 1 "MMBT3904" H 4541 905 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 4550 875 50  0001 L CIN
F 3 "https://www.fairchildsemi.com/datasheets/2N/2N3904.pdf" H 4350 950 50  0001 L CNN
	1    4350 950 
	1    0    0    -1  
$EndComp
$Comp
L power:-VDC #PWR0107
U 1 1 5FEDEFC9
P 4450 1200
F 0 "#PWR0107" H 4450 1100 50  0001 C CNN
F 1 "-VDC" H 4450 1475 50  0000 C CNN
F 2 "" H 4450 1200 50  0001 C CNN
F 3 "" H 4450 1200 50  0001 C CNN
	1    4450 1200
	-1   0    0    1   
$EndComp
Wire Wire Line
	4450 1200 4450 1150
Wire Wire Line
	4450 750  4450 700 
Wire Wire Line
	4150 950  4050 950 
Wire Wire Line
	3500 700  3350 700 
$Comp
L Device:R R48
U 1 1 5FEE4223
P 3900 950
F 0 "R48" V 3693 950 50  0000 C CNN
F 1 "10k" V 3784 950 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 3830 950 50  0001 C CNN
F 3 "~" H 3900 950 50  0001 C CNN
	1    3900 950 
	0    1    1    0   
$EndComp
Wire Wire Line
	4450 700  5000 700 
Wire Wire Line
	3750 950  3700 950 
Wire Wire Line
	3700 950  3700 700 
Wire Wire Line
	3700 700  3500 700 
Connection ~ 3500 700 
$Comp
L Device:C C?
U 1 1 61F9A691
P 3950 4600
AR Path="/61F9A691" Ref="C?"  Part="1" 
AR Path="/5B9414BA/61F9A691" Ref="C7"  Part="1" 
F 0 "C7" H 3975 4700 50  0000 L CNN
F 1 "100nF" H 3975 4500 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 3988 4450 50  0001 C CNN
F 3 "" H 3950 4600 50  0001 C CNN
	1    3950 4600
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 61F9A697
P 3950 5000
AR Path="/61F9A697" Ref="C?"  Part="1" 
AR Path="/5B9414BA/61F9A697" Ref="C8"  Part="1" 
F 0 "C8" H 3975 5100 50  0000 L CNN
F 1 "100nF" H 3975 4900 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 3988 4850 50  0001 C CNN
F 3 "" H 3950 5000 50  0001 C CNN
	1    3950 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	3950 5200 3950 5150
Wire Wire Line
	3950 4400 3950 4450
$Comp
L Device:C C?
U 1 1 61F9A6A1
P 2650 4600
AR Path="/61F9A6A1" Ref="C?"  Part="1" 
AR Path="/5B9414BA/61F9A6A1" Ref="C5"  Part="1" 
F 0 "C5" H 2675 4700 50  0000 L CNN
F 1 "100nF" H 2675 4500 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2688 4450 50  0001 C CNN
F 3 "" H 2650 4600 50  0001 C CNN
	1    2650 4600
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 61F9A6A7
P 2650 5000
AR Path="/61F9A6A7" Ref="C?"  Part="1" 
AR Path="/5B9414BA/61F9A6A7" Ref="C6"  Part="1" 
F 0 "C6" H 2675 5100 50  0000 L CNN
F 1 "100nF" H 2675 4900 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 2688 4850 50  0001 C CNN
F 3 "" H 2650 5000 50  0001 C CNN
	1    2650 5000
	1    0    0    -1  
$EndComp
Wire Wire Line
	2650 5200 2650 5150
Wire Wire Line
	2650 4750 2650 4800
Connection ~ 2650 4800
Wire Wire Line
	2650 4400 2650 4450
Wire Wire Line
	2650 4800 2650 4850
Wire Wire Line
	2650 4800 2900 4800
Wire Wire Line
	3950 4750 3950 4800
Wire Wire Line
	2150 5200 2650 5200
Connection ~ 2150 5200
Wire Wire Line
	2150 5200 2150 5100
Wire Wire Line
	2150 4400 2650 4400
Connection ~ 2150 4400
Wire Wire Line
	2150 4400 2150 4350
Wire Wire Line
	3950 4800 4250 4800
Connection ~ 3950 4800
Wire Wire Line
	3950 4800 3950 4850
Wire Wire Line
	3950 4400 3500 4400
Wire Wire Line
	3500 4400 3500 4500
Wire Wire Line
	3500 4400 3500 4350
Connection ~ 3500 4400
Wire Wire Line
	3500 5250 3500 5200
Wire Wire Line
	3500 5200 3950 5200
Connection ~ 3500 5200
Wire Wire Line
	3500 5200 3500 5100
$Comp
L power:GND #PWR0122
U 1 1 61FBA98E
P 2900 4800
F 0 "#PWR0122" H 2900 4550 50  0001 C CNN
F 1 "GND" V 2905 4672 50  0000 R CNN
F 2 "" H 2900 4800 50  0001 C CNN
F 3 "" H 2900 4800 50  0001 C CNN
	1    2900 4800
	0    -1   -1   0   
$EndComp
$Comp
L power:GND #PWR0123
U 1 1 61FBB535
P 4250 4800
F 0 "#PWR0123" H 4250 4550 50  0001 C CNN
F 1 "GND" V 4255 4672 50  0000 R CNN
F 2 "" H 4250 4800 50  0001 C CNN
F 3 "" H 4250 4800 50  0001 C CNN
	1    4250 4800
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5000 2300 5000 850 
Wire Wire Line
	6150 1700 6150 1650
Wire Wire Line
	6150 2050 6150 2000
Wire Wire Line
	6150 2050 6150 2400
Connection ~ 6150 2050
Wire Wire Line
	5800 2050 6150 2050
Wire Wire Line
	5800 1450 5800 2050
Wire Wire Line
	5850 1450 5800 1450
$Comp
L Device:Q_NJFET_DSG Q13
U 1 1 62B25E7F
P 6050 1450
F 0 "Q13" V 6285 1450 50  0000 C CNN
F 1 "J113" V 6376 1450 50  0000 C CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 6250 1550 50  0001 C CNN
F 3 "~" H 6050 1450 50  0001 C CNN
	1    6050 1450
	1    0    0    -1  
$EndComp
Wire Wire Line
	7650 1900 7650 2000
Wire Wire Line
	6150 1200 6150 1250
$Comp
L power:+VDC #PWR0108
U 1 1 626EAC51
P 6150 1200
F 0 "#PWR0108" H 6150 1100 50  0001 C CNN
F 1 "+VDC" H 6150 1475 50  0000 C CNN
F 2 "" H 6150 1200 50  0001 C CNN
F 3 "" H 6150 1200 50  0001 C CNN
	1    6150 1200
	1    0    0    -1  
$EndComp
$Comp
L Device:R R11
U 1 1 626E79FD
P 6150 1850
F 0 "R11" H 6220 1896 50  0000 L CNN
F 1 "470" H 6220 1805 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 6080 1850 50  0001 C CNN
F 3 "~" H 6150 1850 50  0001 C CNN
	1    6150 1850
	1    0    0    -1  
$EndComp
Wire Wire Line
	5150 2300 5000 2300
Wire Wire Line
	7650 2450 7650 2400
Wire Wire Line
	7700 2400 7650 2400
Wire Wire Line
	5450 2700 5450 2800
$Comp
L power:-VDC #PWR0126
U 1 1 626D3751
P 5450 2850
F 0 "#PWR0126" H 5450 2750 50  0001 C CNN
F 1 "-VDC" H 5450 3125 50  0000 C CNN
F 2 "" H 5450 2850 50  0001 C CNN
F 3 "" H 5450 2850 50  0001 C CNN
	1    5450 2850
	-1   0    0    1   
$EndComp
$Comp
L power:GND #PWR0127
U 1 1 626D2AA4
P 7700 2400
F 0 "#PWR0127" H 7700 2150 50  0001 C CNN
F 1 "GND" H 7705 2227 50  0000 C CNN
F 2 "" H 7700 2400 50  0001 C CNN
F 3 "" H 7700 2400 50  0001 C CNN
	1    7700 2400
	0    -1   -1   0   
$EndComp
$Comp
L Reference_Voltage:LM4040DBZ-5 U8
U 1 1 626CF4A5
P 7650 2200
F 0 "U8" V 7696 2112 50  0000 R CNN
F 1 "LM4040DBZ-5" V 7605 2112 50  0000 R CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 7650 2000 50  0001 C CIN
F 3 "http://www.ti.com/lit/ds/symlink/lm4040-n.pdf" H 7650 2200 50  0001 C CIN
	1    7650 2200
	0    -1   -1   0   
$EndComp
$Comp
L Reference_Voltage:LM4040DBZ-5 U9
U 1 1 626CDDFD
P 7650 2600
F 0 "U9" V 7604 2679 50  0000 L CNN
F 1 "LM4040DBZ-5" V 7695 2679 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 7650 2400 50  0001 C CIN
F 3 "http://www.ti.com/lit/ds/symlink/lm4040-n.pdf" H 7650 2600 50  0001 C CIN
	1    7650 2600
	0    -1   -1   0   
$EndComp
Wire Wire Line
	4000 2500 5150 2500
$Comp
L Device:R R10
U 1 1 62B871E5
P 5650 850
F 0 "R10" V 5443 850 50  0000 C CNN
F 1 "10k" V 5534 850 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 5580 850 50  0001 C CNN
F 3 "~" H 5650 850 50  0001 C CNN
	1    5650 850 
	0    1    1    0   
$EndComp
Wire Wire Line
	5500 850  5000 850 
Wire Wire Line
	5000 850  5000 700 
Connection ~ 5000 850 
$Comp
L Comparator:LM311 U7
U 1 1 62B8E6C7
P 5450 2400
F 0 "U7" H 5794 2446 50  0000 L CNN
F 1 "LM311" H 5794 2355 50  0000 L CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 5450 2400 50  0001 C CNN
F 3 "https://www.st.com/resource/en/datasheet/lm311.pdf" H 5450 2400 50  0001 C CNN
	1    5450 2400
	1    0    0    -1  
$EndComp
Connection ~ 6150 2400
Wire Wire Line
	5750 2400 6150 2400
Wire Wire Line
	1850 3750 5450 3750
Wire Wire Line
	5450 2800 5350 2800
Wire Wire Line
	5350 2800 5350 2700
Connection ~ 5450 2800
Wire Wire Line
	5450 2800 5450 2850
Wire Wire Line
	5350 2100 5350 1950
$Comp
L power:+VDC #PWR0128
U 1 1 62BA5287
P 5350 1950
F 0 "#PWR0128" H 5350 1850 50  0001 C CNN
F 1 "+VDC" H 5350 2225 50  0000 C CNN
F 2 "" H 5350 1950 50  0001 C CNN
F 3 "" H 5350 1950 50  0001 C CNN
	1    5350 1950
	1    0    0    -1  
$EndComp
NoConn ~ 5550 2100
NoConn ~ 5450 2100
Connection ~ 7650 2400
Wire Wire Line
	7650 2400 7650 2350
$Comp
L Device:R R12
U 1 1 62BC9BB5
P 7650 1750
F 0 "R12" H 7720 1796 50  0000 L CNN
F 1 "10k" H 7720 1705 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7580 1750 50  0001 C CNN
F 3 "~" H 7650 1750 50  0001 C CNN
	1    7650 1750
	1    0    0    -1  
$EndComp
$Comp
L Device:R R49
U 1 1 62BCB0FE
P 7650 3050
F 0 "R49" H 7720 3096 50  0000 L CNN
F 1 "10k" H 7720 3005 50  0000 L CNN
F 2 "Resistor_SMD:R_0603_1608Metric" V 7580 3050 50  0001 C CNN
F 3 "~" H 7650 3050 50  0001 C CNN
	1    7650 3050
	1    0    0    -1  
$EndComp
$Comp
L Transistor_FET:2N7002 Q14
U 1 1 62BCD067
P 6900 2100
F 0 "Q14" V 7242 2100 50  0000 C CNN
F 1 "2N7002" V 7151 2100 50  0000 C CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 7100 2025 50  0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/NDS7002A-D.PDF" H 6900 2100 50  0001 L CNN
	1    6900 2100
	0    1    -1   0   
$EndComp
$Comp
L Transistor_FET:BSS84 Q15
U 1 1 62BD63A4
P 6900 2700
F 0 "Q15" V 7149 2700 50  0000 C CNN
F 1 "BSS84" V 7240 2700 50  0000 C CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 7100 2625 50  0001 L CIN
F 3 "http://assets.nexperia.com/documents/data-sheet/BSS84.pdf" H 6900 2700 50  0001 L CNN
	1    6900 2700
	0    1    1    0   
$EndComp
Wire Wire Line
	7100 2000 7650 2000
Connection ~ 7650 2000
Wire Wire Line
	7650 2000 7650 2050
Wire Wire Line
	7100 2800 7650 2800
Wire Wire Line
	7650 2800 7650 2750
Wire Wire Line
	7650 2800 7650 2900
Connection ~ 7650 2800
Wire Wire Line
	6900 2400 6900 2300
Wire Wire Line
	6900 2400 6900 2500
Connection ~ 6900 2400
Wire Wire Line
	6700 2000 6550 2000
Wire Wire Line
	6150 2400 6900 2400
Wire Wire Line
	6550 2000 6550 2800
Wire Wire Line
	6550 2800 6700 2800
Connection ~ 6550 2000
Connection ~ 6550 2800
Wire Wire Line
	6550 2800 6550 3750
Wire Wire Line
	6550 850  5800 850 
Wire Wire Line
	6550 850  6550 2000
Wire Wire Line
	7650 1600 7650 1500
Wire Wire Line
	7650 3200 7650 3300
$Comp
L power:+VDC #PWR0129
U 1 1 62C0D517
P 7650 1500
F 0 "#PWR0129" H 7650 1400 50  0001 C CNN
F 1 "+VDC" H 7650 1775 50  0000 C CNN
F 2 "" H 7650 1500 50  0001 C CNN
F 3 "" H 7650 1500 50  0001 C CNN
	1    7650 1500
	1    0    0    -1  
$EndComp
$Comp
L power:-VDC #PWR0130
U 1 1 62C0DF55
P 7650 3300
F 0 "#PWR0130" H 7650 3200 50  0001 C CNN
F 1 "-VDC" H 7650 3575 50  0000 C CNN
F 2 "" H 7650 3300 50  0001 C CNN
F 3 "" H 7650 3300 50  0001 C CNN
	1    7650 3300
	-1   0    0    1   
$EndComp
$Comp
L Amplifier_Operational:TL072 U3
U 2 1 62B670AA
P 6000 4350
F 0 "U3" H 6000 4717 50  0000 C CNN
F 1 "TL072" H 6000 4626 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 6000 4350 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/tl071.pdf" H 6000 4350 50  0001 C CNN
	2    6000 4350
	1    0    0    -1  
$EndComp
Wire Wire Line
	6300 4350 6400 4350
Wire Wire Line
	5700 4250 5450 4250
Wire Wire Line
	5450 4250 5450 3750
Connection ~ 5450 3750
Wire Wire Line
	5450 3750 6550 3750
Wire Wire Line
	5700 4450 5550 4450
Wire Wire Line
	5550 4450 5550 4700
Wire Wire Line
	5550 4700 6400 4700
Wire Wire Line
	6400 4700 6400 4350
Connection ~ 6400 4350
Wire Wire Line
	6400 4350 6600 4350
$Comp
L power:+VDC #PWR0131
U 1 1 62B93951
P 5400 5700
F 0 "#PWR0131" H 5400 5600 50  0001 C CNN
F 1 "+VDC" H 5400 5950 50  0000 C CNN
F 2 "" H 5400 5700 50  0001 C CNN
F 3 "" H 5400 5700 50  0001 C CNN
	1    5400 5700
	1    0    0    -1  
$EndComp
$Comp
L power:-VDC #PWR0132
U 1 1 62B93FB7
P 5400 6600
F 0 "#PWR0132" H 5400 6500 50  0001 C CNN
F 1 "-VDC" H 5400 6850 50  0000 C CNN
F 2 "" H 5400 6600 50  0001 C CNN
F 3 "" H 5400 6600 50  0001 C CNN
	1    5400 6600
	-1   0    0    1   
$EndComp
$Comp
L Device:C C?
U 1 1 62B93FCB
P 5400 5950
AR Path="/62B93FCB" Ref="C?"  Part="1" 
AR Path="/5B9414BA/62B93FCB" Ref="C9"  Part="1" 
F 0 "C9" H 5425 6050 50  0000 L CNN
F 1 "100nF" H 5425 5850 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 5438 5800 50  0001 C CNN
F 3 "" H 5400 5950 50  0001 C CNN
	1    5400 5950
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 62B93FD5
P 5400 6350
AR Path="/62B93FD5" Ref="C?"  Part="1" 
AR Path="/5B9414BA/62B93FD5" Ref="C10"  Part="1" 
F 0 "C10" H 5425 6450 50  0000 L CNN
F 1 "100nF" H 5425 6250 50  0000 L CNN
F 2 "Capacitor_SMD:C_0603_1608Metric" H 5438 6200 50  0001 C CNN
F 3 "" H 5400 6350 50  0001 C CNN
	1    5400 6350
	1    0    0    -1  
$EndComp
Wire Wire Line
	5400 6100 5400 6150
Wire Wire Line
	5400 6150 5700 6150
Connection ~ 5400 6150
Wire Wire Line
	5400 6150 5400 6200
$Comp
L power:GND #PWR0133
U 1 1 62B93FED
P 5700 6150
F 0 "#PWR0133" H 5700 5900 50  0001 C CNN
F 1 "GND" V 5705 6022 50  0000 R CNN
F 2 "" H 5700 6150 50  0001 C CNN
F 3 "" H 5700 6150 50  0001 C CNN
	1    5700 6150
	0    -1   -1   0   
$EndComp
Wire Wire Line
	5400 5700 5400 5800
Wire Wire Line
	5400 6500 5400 6600
Text Notes 4800 6200 0    50   ~ 0
Near LM311
$EndSCHEMATC