EESchema Schematic File Version 4
LIBS:mixerinput-cache
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 2
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Device:Opamp_Dual_Generic U?
U 2 1 5C072472
P 3300 2250
AR Path="/5C072472" Ref="U?"  Part="1" 
AR Path="/5C06F581/5C072472" Ref="U1"  Part="2" 
AR Path="/5C0574B7/5C072472" Ref="U?"  Part="1" 
AR Path="/5C05A497/5C072472" Ref="U2"  Part="2" 
F 0 "U1" H 3300 1883 50  0000 C CNN
F 1 "LM4562" H 3300 1974 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm" H 3300 2250 50  0001 C CNN
F 3 "~" H 3300 2250 50  0001 C CNN
	2    3300 2250
	1    0    0    1   
$EndComp
$Comp
L Device:Opamp_Dual_Generic U?
U 3 1 5C072479
P 1200 1200
AR Path="/5C072479" Ref="U?"  Part="2" 
AR Path="/5C06F581/5C072479" Ref="U1"  Part="3" 
AR Path="/5C0574B7/5C072479" Ref="U?"  Part="2" 
AR Path="/5C05A497/5C072479" Ref="U2"  Part="1" 
F 0 "U1" H 1250 1000 50  0000 C CNN
F 1 "LM4562" H 1300 1100 50  0000 C CNN
F 2 "Package_DIP:DIP-8_W7.62mm" H 1200 1200 50  0001 C CNN
F 3 "~" H 1200 1200 50  0001 C CNN
	3    1200 1200
	1    0    0    1   
$EndComp
$Comp
L Device:R R?
U 1 1 5C07248F
P 2700 2150
AR Path="/5C07248F" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C07248F" Ref="RinA+1"  Part="1" 
AR Path="/5C0574B7/5C07248F" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C07248F" Ref="RinA+2"  Part="1" 
F 0 "RinA+1" V 2907 2150 50  0000 C CNN
F 1 "10k" V 2816 2150 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2630 2150 50  0001 C CNN
F 3 "~" H 2700 2150 50  0001 C CNN
F 4 "Metallfilm" V 2700 2150 50  0001 C CNN "Notes"
	1    2700 2150
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3000 2150 2950 2150
$Comp
L Device:R R?
U 1 1 5C072498
P 3300 1800
AR Path="/5C072498" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C072498" Ref="Rfb2"  Part="1" 
AR Path="/5C0574B7/5C072498" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C072498" Ref="Rfb4"  Part="1" 
F 0 "Rfb2" V 3507 1800 50  0000 C CNN
F 1 "10k" V 3416 1800 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical" V 3230 1800 50  0001 C CNN
F 3 "~" H 3300 1800 50  0001 C CNN
F 4 "Metallfilm" V 3300 1800 50  0001 C CNN "Notes"
	1    3300 1800
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3600 2250 3600 1800
Wire Wire Line
	3600 1800 3450 1800
Wire Wire Line
	3150 1800 2950 1800
Wire Wire Line
	2950 1800 2950 2150
Wire Wire Line
	2950 2150 2850 2150
Connection ~ 2950 2150
Text Notes 3450 1800 0    50   ~ 0
v = -R2/R1
$Comp
L Device:R R?
U 1 1 5C0724AF
P 2500 2350
AR Path="/5C0724AF" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C0724AF" Ref="RinA-1"  Part="1" 
AR Path="/5C0574B7/5C0724AF" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C0724AF" Ref="RinA-2"  Part="1" 
F 0 "RinA-1" V 2707 2350 50  0000 C CNN
F 1 "10k" V 2616 2350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2430 2350 50  0001 C CNN
F 3 "~" H 2500 2350 50  0001 C CNN
F 4 "Metallfilm" V 2500 2350 50  0001 C CNN "Notes"
	1    2500 2350
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R?
U 1 1 5C0724B7
P 2800 2750
AR Path="/5C0724B7" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C0724B7" Ref="RlowA1"  Part="1" 
AR Path="/5C0574B7/5C0724B7" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C0724B7" Ref="RlowA2"  Part="1" 
F 0 "RlowA1" V 3007 2750 50  0000 C CNN
F 1 "10k" V 2916 2750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2730 2750 50  0001 C CNN
F 3 "~" H 2800 2750 50  0001 C CNN
F 4 "Metallfilm" V 2800 2750 50  0001 C CNN "Notes"
	1    2800 2750
	1    0    0    -1  
$EndComp
Wire Wire Line
	2650 2350 2800 2350
Connection ~ 2800 2350
Wire Wire Line
	2800 2350 3000 2350
Wire Wire Line
	1200 2150 2550 2150
Wire Wire Line
	2350 2350 2250 2350
$Comp
L Device:R R?
U 1 1 5C0724C4
P 2250 2750
AR Path="/5C0724C4" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C0724C4" Ref="RgndA1"  Part="1" 
AR Path="/5C0574B7/5C0724C4" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C0724C4" Ref="RgndA2"  Part="1" 
F 0 "RgndA1" V 2457 2750 50  0000 C CNN
F 1 "10" V 2366 2750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2180 2750 50  0001 C CNN
F 3 "~" H 2250 2750 50  0001 C CNN
F 4 "Metallfilm" V 2250 2750 50  0001 C CNN "Notes"
	1    2250 2750
	1    0    0    -1  
$EndComp
$Comp
L power:GNDA #PWR?
U 1 1 5C0724CB
P 2250 2900
AR Path="/5C0724CB" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C0724CB" Ref="#PWR0102"  Part="1" 
AR Path="/5C0574B7/5C0724CB" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C0724CB" Ref="#PWR0110"  Part="1" 
F 0 "#PWR0102" H 2250 2650 50  0001 C CNN
F 1 "GNDA" H 2255 2727 50  0000 C CNN
F 2 "" H 2250 2900 50  0001 C CNN
F 3 "" H 2250 2900 50  0001 C CNN
	1    2250 2900
	1    0    0    -1  
$EndComp
$Comp
L power:GNDA #PWR?
U 1 1 5C0724D8
P 2800 2900
AR Path="/5C0724D8" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C0724D8" Ref="#PWR0103"  Part="1" 
AR Path="/5C0574B7/5C0724D8" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C0724D8" Ref="#PWR0111"  Part="1" 
F 0 "#PWR0103" H 2800 2650 50  0001 C CNN
F 1 "GNDA" H 2805 2727 50  0000 C CNN
F 2 "" H 2800 2900 50  0001 C CNN
F 3 "" H 2800 2900 50  0001 C CNN
	1    2800 2900
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x02_Male J?
U 1 1 5C0724DE
P 2050 2400
AR Path="/5C0724DE" Ref="J?"  Part="1" 
AR Path="/5C06F581/5C0724DE" Ref="J2"  Part="1" 
AR Path="/5C0574B7/5C0724DE" Ref="J?"  Part="1" 
AR Path="/5C05A497/5C0724DE" Ref="J4"  Part="1" 
F 0 "J2" H 2156 2578 50  0000 C CNN
F 1 "Jumper" H 2100 2250 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 2050 2400 50  0001 C CNN
F 3 "~" H 2050 2400 50  0001 C CNN
	1    2050 2400
	1    0    0    -1  
$EndComp
Wire Wire Line
	2250 2600 2250 2500
Wire Wire Line
	2250 2400 2250 2350
Connection ~ 2250 2350
Wire Wire Line
	2800 2350 2800 2600
$Comp
L Device:R R?
U 1 1 5C0724F2
P 2550 3750
AR Path="/5C0724F2" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C0724F2" Ref="RinB+1"  Part="1" 
AR Path="/5C0574B7/5C0724F2" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C0724F2" Ref="RinB+2"  Part="1" 
F 0 "RinB+1" V 2757 3750 50  0000 C CNN
F 1 "10k" V 2666 3750 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2480 3750 50  0001 C CNN
F 3 "~" H 2550 3750 50  0001 C CNN
F 4 "Metallfilm" V 2550 3750 50  0001 C CNN "Notes"
	1    2550 3750
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3000 3400 2800 3400
Wire Wire Line
	2800 3400 2800 3750
Wire Wire Line
	2800 3750 2700 3750
Connection ~ 2800 3750
$Comp
L Device:R R?
U 1 1 5C0724FE
P 2350 3950
AR Path="/5C0724FE" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C0724FE" Ref="RinB-1"  Part="1" 
AR Path="/5C0574B7/5C0724FE" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C0724FE" Ref="RinB-2"  Part="1" 
F 0 "RinB-1" V 2557 3950 50  0000 C CNN
F 1 "10k" V 2466 3950 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2280 3950 50  0001 C CNN
F 3 "~" H 2350 3950 50  0001 C CNN
F 4 "Metallfilm" V 2350 3950 50  0001 C CNN "Notes"
	1    2350 3950
	0    -1   -1   0   
$EndComp
$Comp
L Device:R R?
U 1 1 5C072506
P 2650 4350
AR Path="/5C072506" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C072506" Ref="RlowB1"  Part="1" 
AR Path="/5C0574B7/5C072506" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C072506" Ref="RlowB2"  Part="1" 
F 0 "RlowB1" V 2857 4350 50  0000 C CNN
F 1 "10k" V 2766 4350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2580 4350 50  0001 C CNN
F 3 "~" H 2650 4350 50  0001 C CNN
F 4 "Metallfilm" V 2650 4350 50  0001 C CNN "Notes"
	1    2650 4350
	1    0    0    -1  
$EndComp
Wire Wire Line
	2500 3950 2650 3950
Connection ~ 2650 3950
Wire Wire Line
	1200 3750 2400 3750
Wire Wire Line
	2200 3950 2100 3950
$Comp
L Device:R R?
U 1 1 5C072512
P 2100 4350
AR Path="/5C072512" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C072512" Ref="RgndB1"  Part="1" 
AR Path="/5C0574B7/5C072512" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C072512" Ref="RgndB2"  Part="1" 
F 0 "RgndB1" V 2307 4350 50  0000 C CNN
F 1 "10" V 2216 4350 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 2030 4350 50  0001 C CNN
F 3 "~" H 2100 4350 50  0001 C CNN
F 4 "Metallfilm" V 2100 4350 50  0001 C CNN "Notes"
	1    2100 4350
	1    0    0    -1  
$EndComp
$Comp
L power:GNDA #PWR?
U 1 1 5C072519
P 2100 4500
AR Path="/5C072519" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C072519" Ref="#PWR0104"  Part="1" 
AR Path="/5C0574B7/5C072519" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C072519" Ref="#PWR0112"  Part="1" 
F 0 "#PWR0104" H 2100 4250 50  0001 C CNN
F 1 "GNDA" H 2105 4327 50  0000 C CNN
F 2 "" H 2100 4500 50  0001 C CNN
F 3 "" H 2100 4500 50  0001 C CNN
	1    2100 4500
	1    0    0    -1  
$EndComp
$Comp
L power:GNDA #PWR?
U 1 1 5C07251F
P 2650 4500
AR Path="/5C07251F" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C07251F" Ref="#PWR0105"  Part="1" 
AR Path="/5C0574B7/5C07251F" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C07251F" Ref="#PWR0113"  Part="1" 
F 0 "#PWR0105" H 2650 4250 50  0001 C CNN
F 1 "GNDA" H 2655 4327 50  0000 C CNN
F 2 "" H 2650 4500 50  0001 C CNN
F 3 "" H 2650 4500 50  0001 C CNN
	1    2650 4500
	1    0    0    -1  
$EndComp
$Comp
L Connector:Conn_01x02_Male J?
U 1 1 5C072525
P 1900 4000
AR Path="/5C072525" Ref="J?"  Part="1" 
AR Path="/5C06F581/5C072525" Ref="J1"  Part="1" 
AR Path="/5C0574B7/5C072525" Ref="J?"  Part="1" 
AR Path="/5C05A497/5C072525" Ref="J3"  Part="1" 
F 0 "J1" H 2006 4178 50  0000 C CNN
F 1 "Jumper" H 1950 3850 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical" H 1900 4000 50  0001 C CNN
F 3 "~" H 1900 4000 50  0001 C CNN
	1    1900 4000
	1    0    0    -1  
$EndComp
Wire Wire Line
	2100 4200 2100 4100
Wire Wire Line
	2100 4000 2100 3950
Connection ~ 2100 3950
Wire Wire Line
	2650 3950 2650 4200
Wire Wire Line
	2800 3750 3000 3750
Wire Wire Line
	2650 3950 3000 3950
$Comp
L Device:R R?
U 1 1 5C072534
P 3150 3400
AR Path="/5C072534" Ref="R?"  Part="1" 
AR Path="/5C06F581/5C072534" Ref="Rfb1"  Part="1" 
AR Path="/5C0574B7/5C072534" Ref="R?"  Part="1" 
AR Path="/5C05A497/5C072534" Ref="Rfb3"  Part="1" 
F 0 "Rfb1" V 3357 3400 50  0000 C CNN
F 1 "10k" V 3266 3400 50  0000 C CNN
F 2 "Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal" V 3080 3400 50  0001 C CNN
F 3 "~" H 3150 3400 50  0001 C CNN
F 4 "Metallfilm" V 3150 3400 50  0001 C CNN "Notes"
	1    3150 3400
	0    -1   -1   0   
$EndComp
Wire Wire Line
	3600 3850 3600 3400
Wire Wire Line
	3600 3400 3300 3400
Text Notes 1550 2650 0    50   ~ 0
Connect for \nunbalanced\ninput signal
Connection ~ 3600 2250
$Comp
L Device:Opamp_Dual_Generic U?
U 1 1 5C07338E
P 3300 3850
AR Path="/5C07338E" Ref="U?"  Part="3" 
AR Path="/5C06F581/5C07338E" Ref="U1"  Part="1" 
AR Path="/5C0574B7/5C07338E" Ref="U?"  Part="3" 
AR Path="/5C05A497/5C07338E" Ref="U2"  Part="3" 
F 0 "U1" H 3300 4000 50  0000 L CNN
F 1 "LM4562" H 3300 3700 50  0000 L CNN
F 2 "Package_DIP:DIP-8_W7.62mm" H 3300 3850 50  0001 C CNN
F 3 "~" H 3300 3850 50  0001 C CNN
	1    3300 3850
	1    0    0    -1  
$EndComp
$Comp
L Device:C CU1+?
U 1 1 5C073395
P 900 1050
AR Path="/5C073395" Ref="CU1+?"  Part="1" 
AR Path="/5C06F581/5C073395" Ref="CU+1"  Part="1" 
AR Path="/5C0574B7/5C073395" Ref="CU1+?"  Part="1" 
AR Path="/5C05A497/5C073395" Ref="CU+2"  Part="1" 
F 0 "CU+1" H 550 1100 50  0000 L CNN
F 1 "100n" H 600 1000 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 938 900 50  0001 C CNN
F 3 "~" H 900 1050 50  0001 C CNN
	1    900  1050
	1    0    0    -1  
$EndComp
Wire Wire Line
	1100 1550 1100 1500
Wire Wire Line
	1100 900  1100 850 
$Comp
L power:GNDA #PWR?
U 1 1 5C0733A0
P 700 1200
AR Path="/5C0733A0" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C0733A0" Ref="#PWR0106"  Part="1" 
AR Path="/5C0574B7/5C0733A0" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C0733A0" Ref="#PWR0114"  Part="1" 
F 0 "#PWR0106" H 700 950 50  0001 C CNN
F 1 "GNDA" H 705 1027 50  0000 C CNN
F 2 "" H 700 1200 50  0001 C CNN
F 3 "" H 700 1200 50  0001 C CNN
	1    700  1200
	1    0    0    -1  
$EndComp
$Comp
L Device:C CU1-?
U 1 1 5C0733A6
P 900 1350
AR Path="/5C0733A6" Ref="CU1-?"  Part="1" 
AR Path="/5C06F581/5C0733A6" Ref="CU-1"  Part="1" 
AR Path="/5C0574B7/5C0733A6" Ref="CU1-?"  Part="1" 
AR Path="/5C05A497/5C0733A6" Ref="CU-2"  Part="1" 
F 0 "CU-1" H 600 1200 50  0000 L CNN
F 1 "100n" H 650 1100 50  0000 L CNN
F 2 "Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm" H 938 1200 50  0001 C CNN
F 3 "~" H 900 1350 50  0001 C CNN
	1    900  1350
	1    0    0    -1  
$EndComp
Wire Wire Line
	900  1500 1100 1500
Wire Wire Line
	700  1200 900  1200
Connection ~ 900  1200
Wire Wire Line
	900  900  1100 900 
$Comp
L power:+15V #PWR?
U 1 1 5C0733B1
P 1100 850
AR Path="/5C0733B1" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C0733B1" Ref="#PWR0107"  Part="1" 
AR Path="/5C0574B7/5C0733B1" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C0733B1" Ref="#PWR0115"  Part="1" 
F 0 "#PWR0107" H 1100 700 50  0001 C CNN
F 1 "+15V" H 1115 1023 50  0000 C CNN
F 2 "" H 1100 850 50  0001 C CNN
F 3 "" H 1100 850 50  0001 C CNN
	1    1100 850 
	1    0    0    -1  
$EndComp
$Comp
L power:-15V #PWR?
U 1 1 5C0733B7
P 1100 1550
AR Path="/5C0733B7" Ref="#PWR?"  Part="1" 
AR Path="/5C06F581/5C0733B7" Ref="#PWR0108"  Part="1" 
AR Path="/5C0574B7/5C0733B7" Ref="#PWR?"  Part="1" 
AR Path="/5C05A497/5C0733B7" Ref="#PWR0116"  Part="1" 
F 0 "#PWR0108" H 1100 1650 50  0001 C CNN
F 1 "-15V" H 1115 1723 50  0000 C CNN
F 2 "" H 1100 1550 50  0001 C CNN
F 3 "" H 1100 1550 50  0001 C CNN
	1    1100 1550
	-1   0    0    1   
$EndComp
Text HLabel 4350 2250 2    50   Output ~ 0
outA
Wire Wire Line
	3600 2250 4350 2250
Text HLabel 4350 3850 2    50   Output ~ 0
outB
Wire Wire Line
	4350 3850 3600 3850
Text HLabel 1200 2150 0    50   Input ~ 0
inA+
Text HLabel 1200 3750 0    50   Input ~ 0
inB+
Text HLabel 1200 2350 0    50   Input ~ 0
inA-
Text HLabel 1200 3950 0    50   Input ~ 0
inB-
Wire Wire Line
	1200 3950 2100 3950
Wire Wire Line
	1200 2350 2250 2350
Text Notes 1350 4250 0    50   ~ 0
Connect for \nunbalanced\ninput signal
Connection ~ 3600 3850
Connection ~ 1100 900 
Connection ~ 1100 1500
$EndSCHEMATC