EESchema Schematic File Version 4 EELAYER 30 0 EELAYER END $Descr A4 11693 8268 encoding utf-8 Sheet 2 4 Title "" Date "" Rev "" Comp "" Comment1 "" Comment2 "" Comment3 "" Comment4 "" $EndDescr $Comp L Amplifier_Operational:LM13700 U? U 1 1 5FF0E3A8 P 4400 1850 F 0 "U?" H 4400 2217 50 0000 C CNN F 1 "LM13700" H 4400 2126 50 0000 C CNN F 2 "" H 4100 1875 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 4100 1875 50 0001 C CNN 1 4400 1850 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM13700 U? U 3 1 5FF0EB11 P 4250 5300 F 0 "U?" H 4250 5667 50 0000 C CNN F 1 "LM13700" H 4250 5576 50 0000 C CNN F 2 "" H 3950 5325 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 3950 5325 50 0001 C CNN 3 4250 5300 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM13700 U? U 2 1 5FF0F002 P 5600 1850 F 0 "U?" H 5750 2000 50 0000 C CNN F 1 "LM13700" H 5850 1900 50 0000 C CNN F 2 "" H 5300 1875 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 5300 1875 50 0001 C CNN 2 5600 1850 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM13700 U? U 4 1 5FF0F602 P 5450 5300 F 0 "U?" H 5350 5648 50 0000 C CNN F 1 "LM13700" H 5350 5557 50 0000 C CNN F 2 "" H 5150 5325 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 5150 5325 50 0001 C CNN 4 5450 5300 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM13700 U? U 5 1 5FF10492 P 9050 3700 F 0 "U?" H 9008 3746 50 0000 L CNN F 1 "LM13700" H 9008 3655 50 0000 L CNN F 2 "" H 8750 3725 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm13700.pdf" H 8750 3725 50 0001 C CNN 5 9050 3700 1 0 0 -1 $EndComp $Comp L Device:R R? U 1 1 5FF168F2 P 3750 1350 F 0 "R?" H 3680 1304 50 0000 R CNN F 1 "11k" H 3680 1395 50 0000 R CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3680 1350 50 0001 C CNN F 3 "~" H 3750 1350 50 0001 C CNN 1 3750 1350 -1 0 0 1 $EndComp $Comp L Device:C C? U 1 1 5FF1784B P 8450 3700 F 0 "C?" H 8565 3746 50 0000 L CNN F 1 "0.1u" H 8565 3655 50 0000 L CNN F 2 "Capacitor_SMD:C_0603_1608Metric" H 8488 3550 50 0001 C CNN F 3 "~" H 8450 3700 50 0001 C CNN 1 8450 3700 1 0 0 -1 $EndComp Wire Wire Line 8450 3550 8450 3400 Wire Wire Line 8450 3400 8700 3400 Wire Wire Line 8450 3850 8450 4000 Wire Wire Line 8450 4000 8700 4000 $Comp L power:+12V #PWR? U 1 1 5FF197AC P 3750 1100 F 0 "#PWR?" H 3750 950 50 0001 C CNN F 1 "+12V" H 3765 1273 50 0000 C CNN F 2 "" H 3750 1100 50 0001 C CNN F 3 "" H 3750 1100 50 0001 C CNN 1 3750 1100 1 0 0 -1 $EndComp $Comp L power:-12V #PWR? U 1 1 5FF19F68 P 8700 4000 F 0 "#PWR?" H 8700 4100 50 0001 C CNN F 1 "-12V" H 8715 4173 50 0000 C CNN F 2 "" H 8700 4000 50 0001 C CNN F 3 "" H 8700 4000 50 0001 C CNN 1 8700 4000 -1 0 0 1 $EndComp $Comp L power:GND #PWR? U 1 1 5FF1A3A4 P 3100 2100 F 0 "#PWR?" H 3100 1850 50 0001 C CNN F 1 "GND" H 3105 1927 50 0000 C CNN F 2 "" H 3100 2100 50 0001 C CNN F 3 "" H 3100 2100 50 0001 C CNN 1 3100 2100 1 0 0 -1 $EndComp Wire Wire Line 3750 1200 3750 1100 Wire Wire Line 3750 1500 3750 1850 Wire Wire Line 3750 1850 4100 1850 $Comp L Device:R R? U 1 1 5FF1C4D8 P 3450 1750 F 0 "R?" V 3243 1750 50 0000 C CNN F 1 "510R" V 3334 1750 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3380 1750 50 0001 C CNN F 3 "~" H 3450 1750 50 0001 C CNN 1 3450 1750 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5FF1D173 P 3450 1950 F 0 "R?" V 3550 1950 50 0000 C CNN F 1 "510R" V 3650 1950 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3380 1950 50 0001 C CNN F 3 "~" H 3450 1950 50 0001 C CNN 1 3450 1950 0 1 1 0 $EndComp Wire Wire Line 3600 1950 3750 1950 Wire Wire Line 3600 1750 4100 1750 Wire Wire Line 3300 1950 3100 1950 Wire Wire Line 3100 1950 3100 1750 Wire Wire Line 3100 1750 3300 1750 Wire Wire Line 3100 2100 3100 1950 Connection ~ 3100 1950 Wire Wire Line 3750 2500 3750 1950 Connection ~ 3750 1950 Wire Wire Line 3750 1950 4100 1950 Connection ~ 8700 4000 Wire Wire Line 8700 4000 8950 4000 $Comp L power:+12V #PWR? U 1 1 5FF20699 P 8700 3400 F 0 "#PWR?" H 8700 3250 50 0001 C CNN F 1 "+12V" H 8715 3573 50 0000 C CNN F 2 "" H 8700 3400 50 0001 C CNN F 3 "" H 8700 3400 50 0001 C CNN 1 8700 3400 1 0 0 -1 $EndComp Connection ~ 8700 3400 Wire Wire Line 8700 3400 8950 3400 Text HLabel 2850 2500 0 50 Input ~ 0 V_SIG_IN_1 $Comp L Device:R R? U 1 1 5FF21944 P 3300 2500 F 0 "R?" V 3400 2500 50 0000 C CNN F 1 "300k" V 3500 2500 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3230 2500 50 0001 C CNN F 3 "~" H 3300 2500 50 0001 C CNN 1 3300 2500 0 1 1 0 $EndComp Wire Wire Line 2850 2500 3150 2500 Wire Wire Line 3450 2500 3750 2500 $Comp L Device:R R? U 1 1 5FF22BF3 P 5100 2150 F 0 "R?" H 5300 2100 50 0000 C CNN F 1 "300k" H 5250 2200 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 5030 2150 50 0001 C CNN F 3 "~" H 5100 2150 50 0001 C CNN 1 5100 2150 -1 0 0 1 $EndComp $Comp L Device:R R? U 1 1 5FF25107 P 5700 2300 F 0 "R?" H 5850 2250 50 0000 C CNN F 1 "5k" H 5850 2350 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 5630 2300 50 0001 C CNN F 3 "~" H 5700 2300 50 0001 C CNN 1 5700 2300 -1 0 0 1 $EndComp $Comp L power:-12V #PWR? U 1 1 5FF25B63 P 5700 2450 F 0 "#PWR?" H 5700 2550 50 0001 C CNN F 1 "-12V" H 5715 2623 50 0000 C CNN F 2 "" H 5700 2450 50 0001 C CNN F 3 "" H 5700 2450 50 0001 C CNN 1 5700 2450 -1 0 0 1 $EndComp Wire Wire Line 5700 2150 5700 2050 $Comp L power:GND #PWR? U 1 1 5FF27306 P 5100 2450 F 0 "#PWR?" H 5100 2200 50 0001 C CNN F 1 "GND" H 5105 2277 50 0000 C CNN F 2 "" H 5100 2450 50 0001 C CNN F 3 "" H 5100 2450 50 0001 C CNN 1 5100 2450 1 0 0 -1 $EndComp Wire Wire Line 5100 2450 5100 2300 Wire Wire Line 4700 1850 5100 1850 Wire Wire Line 5100 2000 5100 1850 Connection ~ 5100 1850 Wire Wire Line 5100 1850 5300 1850 $Comp L Amplifier_Operational:TL084 U? U 4 1 5FF28D27 P 4100 3450 F 0 "U?" H 4200 3150 50 0000 C CNN F 1 "TL084" H 4250 3250 50 0000 C CNN F 2 "" H 4050 3550 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/tl081.pdf" H 4150 3650 50 0001 C CNN 4 4100 3450 1 0 0 1 $EndComp Text HLabel 6150 2050 2 50 Output ~ 0 V_SIG_OUT_1 Wire Wire Line 6150 2050 5700 2050 Connection ~ 5700 2050 Wire Wire Line 5700 2050 5700 1950 $Comp L Device:R R? U 1 1 5FF304E8 P 4700 2650 F 0 "R?" H 4900 2600 50 0000 C CNN F 1 "21k" H 4900 2700 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 4630 2650 50 0001 C CNN F 3 "~" H 4700 2650 50 0001 C CNN 1 4700 2650 -1 0 0 1 $EndComp Wire Wire Line 4700 2500 4700 1950 Wire Wire Line 4400 3450 4700 3450 Wire Wire Line 4700 3450 4700 3000 $Comp L Device:R R? U 1 1 5FF347BE P 4100 3000 F 0 "R?" V 4200 3100 50 0000 C CNN F 1 "100k" V 4200 2900 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 4030 3000 50 0001 C CNN F 3 "~" H 4100 3000 50 0001 C CNN 1 4100 3000 0 -1 -1 0 $EndComp $Comp L Device:R R? U 1 1 5FF34C8B P 3350 3000 F 0 "R?" V 3450 3100 50 0000 C CNN F 1 "91k" V 3450 2900 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3280 3000 50 0001 C CNN F 3 "~" H 3350 3000 50 0001 C CNN 1 3350 3000 0 -1 -1 0 $EndComp Wire Wire Line 4250 3000 4700 3000 Connection ~ 4700 3000 Wire Wire Line 4700 3000 4700 2800 Wire Wire Line 3500 3000 3700 3000 Wire Wire Line 3800 3350 3700 3350 Wire Wire Line 3700 3350 3700 3000 Connection ~ 3700 3000 Wire Wire Line 3700 3000 3950 3000 $Comp L Device:R R? U 1 1 5FF37981 P 2650 3000 F 0 "R?" V 2750 3100 50 0000 C CNN F 1 "15k" V 2750 2900 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 2580 3000 50 0001 C CNN F 3 "~" H 2650 3000 50 0001 C CNN 1 2650 3000 0 -1 -1 0 $EndComp $Comp L Device:R R? U 1 1 5FF37F27 P 3000 3250 F 0 "R?" H 3150 3300 50 0000 C CNN F 1 "10k" H 3150 3200 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 2930 3250 50 0001 C CNN F 3 "~" H 3000 3250 50 0001 C CNN 1 3000 3250 1 0 0 -1 $EndComp $Comp L power:GND #PWR? U 1 1 5FF385AE P 3000 3400 F 0 "#PWR?" H 3000 3150 50 0001 C CNN F 1 "GND" H 3005 3227 50 0000 C CNN F 2 "" H 3000 3400 50 0001 C CNN F 3 "" H 3000 3400 50 0001 C CNN 1 3000 3400 1 0 0 -1 $EndComp $Comp L power:+12V #PWR? U 1 1 5FF38B11 P 2250 3000 F 0 "#PWR?" H 2250 2850 50 0001 C CNN F 1 "+12V" H 2265 3173 50 0000 C CNN F 2 "" H 2250 3000 50 0001 C CNN F 3 "" H 2250 3000 50 0001 C CNN 1 2250 3000 1 0 0 -1 $EndComp Wire Wire Line 2250 3000 2500 3000 Wire Wire Line 2800 3000 3000 3000 Wire Wire Line 3000 3100 3000 3000 Connection ~ 3000 3000 Wire Wire Line 3000 3000 3200 3000 Wire Wire Line 3350 3750 3350 3550 Wire Wire Line 3350 3550 3800 3550 Text HLabel 2800 3750 0 50 Input ~ 0 CV_1 Wire Wire Line 2800 3750 3350 3750 $Comp L Device:R R? U 1 1 5FF70BCD P 3600 4800 F 0 "R?" H 3530 4754 50 0000 R CNN F 1 "11k" H 3530 4845 50 0000 R CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3530 4800 50 0001 C CNN F 3 "~" H 3600 4800 50 0001 C CNN 1 3600 4800 -1 0 0 1 $EndComp $Comp L power:+12V #PWR? U 1 1 5FF70BD7 P 3600 4550 F 0 "#PWR?" H 3600 4400 50 0001 C CNN F 1 "+12V" H 3615 4723 50 0000 C CNN F 2 "" H 3600 4550 50 0001 C CNN F 3 "" H 3600 4550 50 0001 C CNN 1 3600 4550 1 0 0 -1 $EndComp $Comp L power:GND #PWR? U 1 1 5FF70BE1 P 2950 5550 F 0 "#PWR?" H 2950 5300 50 0001 C CNN F 1 "GND" H 2955 5377 50 0000 C CNN F 2 "" H 2950 5550 50 0001 C CNN F 3 "" H 2950 5550 50 0001 C CNN 1 2950 5550 1 0 0 -1 $EndComp Wire Wire Line 3600 4650 3600 4550 Wire Wire Line 3600 4950 3600 5300 Wire Wire Line 3600 5300 3950 5300 $Comp L Device:R R? U 1 1 5FF70BEE P 3300 5200 F 0 "R?" V 3093 5200 50 0000 C CNN F 1 "510R" V 3184 5200 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3230 5200 50 0001 C CNN F 3 "~" H 3300 5200 50 0001 C CNN 1 3300 5200 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5FF70BF8 P 3300 5400 F 0 "R?" V 3400 5400 50 0000 C CNN F 1 "510R" V 3500 5400 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3230 5400 50 0001 C CNN F 3 "~" H 3300 5400 50 0001 C CNN 1 3300 5400 0 1 1 0 $EndComp Wire Wire Line 3450 5400 3600 5400 Wire Wire Line 3450 5200 3950 5200 Wire Wire Line 3150 5400 2950 5400 Wire Wire Line 2950 5400 2950 5200 Wire Wire Line 2950 5200 3150 5200 Wire Wire Line 2950 5550 2950 5400 Connection ~ 2950 5400 Wire Wire Line 3600 5950 3600 5400 Connection ~ 3600 5400 Wire Wire Line 3600 5400 3950 5400 Text HLabel 2700 5950 0 50 Input ~ 0 V_SIG_IN_2 $Comp L Device:R R? U 1 1 5FF70C0D P 3150 5950 F 0 "R?" V 3250 5950 50 0000 C CNN F 1 "300k" V 3350 5950 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3080 5950 50 0001 C CNN F 3 "~" H 3150 5950 50 0001 C CNN 1 3150 5950 0 1 1 0 $EndComp Wire Wire Line 2700 5950 3000 5950 Wire Wire Line 3300 5950 3600 5950 $Comp L Device:R R? U 1 1 5FF70C19 P 4950 5600 F 0 "R?" H 5150 5550 50 0000 C CNN F 1 "300k" H 5100 5650 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 4880 5600 50 0001 C CNN F 3 "~" H 4950 5600 50 0001 C CNN 1 4950 5600 -1 0 0 1 $EndComp $Comp L Device:R R? U 1 1 5FF70C23 P 5550 5750 F 0 "R?" H 5700 5700 50 0000 C CNN F 1 "5k" H 5700 5800 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 5480 5750 50 0001 C CNN F 3 "~" H 5550 5750 50 0001 C CNN 1 5550 5750 -1 0 0 1 $EndComp $Comp L power:-12V #PWR? U 1 1 5FF70C2D P 5550 5900 F 0 "#PWR?" H 5550 6000 50 0001 C CNN F 1 "-12V" H 5565 6073 50 0000 C CNN F 2 "" H 5550 5900 50 0001 C CNN F 3 "" H 5550 5900 50 0001 C CNN 1 5550 5900 -1 0 0 1 $EndComp Wire Wire Line 5550 5600 5550 5500 $Comp L power:GND #PWR? U 1 1 5FF70C38 P 4950 5900 F 0 "#PWR?" H 4950 5650 50 0001 C CNN F 1 "GND" H 4955 5727 50 0000 C CNN F 2 "" H 4950 5900 50 0001 C CNN F 3 "" H 4950 5900 50 0001 C CNN 1 4950 5900 1 0 0 -1 $EndComp Wire Wire Line 4950 5900 4950 5750 Wire Wire Line 4550 5300 4950 5300 Wire Wire Line 4950 5450 4950 5300 Connection ~ 4950 5300 Wire Wire Line 4950 5300 5150 5300 $Comp L Amplifier_Operational:TL084 U? U 4 1 5FF70C47 P 3950 6900 F 0 "U?" H 4050 6600 50 0000 C CNN F 1 "TL084" H 4100 6700 50 0000 C CNN F 2 "" H 3900 7000 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/tl081.pdf" H 4000 7100 50 0001 C CNN 4 3950 6900 1 0 0 1 $EndComp Text HLabel 6000 5500 2 50 Output ~ 0 V_SIG_OUT_2 Wire Wire Line 6000 5500 5550 5500 Connection ~ 5550 5500 Wire Wire Line 5550 5500 5550 5400 $Comp L Device:R R? U 1 1 5FF70C55 P 4550 6100 F 0 "R?" H 4750 6050 50 0000 C CNN F 1 "21k" H 4750 6150 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 4480 6100 50 0001 C CNN F 3 "~" H 4550 6100 50 0001 C CNN 1 4550 6100 -1 0 0 1 $EndComp Wire Wire Line 4550 5950 4550 5400 Wire Wire Line 4250 6900 4550 6900 Wire Wire Line 4550 6900 4550 6450 $Comp L Device:R R? U 1 1 5FF70C62 P 3950 6450 F 0 "R?" V 4050 6550 50 0000 C CNN F 1 "100k" V 4050 6350 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3880 6450 50 0001 C CNN F 3 "~" H 3950 6450 50 0001 C CNN 1 3950 6450 0 -1 -1 0 $EndComp $Comp L Device:R R? U 1 1 5FF70C6C P 3200 6450 F 0 "R?" V 3300 6550 50 0000 C CNN F 1 "91k" V 3300 6350 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 3130 6450 50 0001 C CNN F 3 "~" H 3200 6450 50 0001 C CNN 1 3200 6450 0 -1 -1 0 $EndComp Wire Wire Line 4100 6450 4550 6450 Connection ~ 4550 6450 Wire Wire Line 4550 6450 4550 6250 Wire Wire Line 3350 6450 3550 6450 Wire Wire Line 3650 6800 3550 6800 Wire Wire Line 3550 6800 3550 6450 Connection ~ 3550 6450 Wire Wire Line 3550 6450 3800 6450 $Comp L Device:R R? U 1 1 5FF70C7E P 2500 6450 F 0 "R?" V 2600 6550 50 0000 C CNN F 1 "15k" V 2600 6350 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 2430 6450 50 0001 C CNN F 3 "~" H 2500 6450 50 0001 C CNN 1 2500 6450 0 -1 -1 0 $EndComp $Comp L Device:R R? U 1 1 5FF70C88 P 2850 6700 F 0 "R?" H 3000 6750 50 0000 C CNN F 1 "10k" H 3000 6650 50 0000 C CNN F 2 "Resistor_SMD:R_0603_1608Metric" V 2780 6700 50 0001 C CNN F 3 "~" H 2850 6700 50 0001 C CNN 1 2850 6700 1 0 0 -1 $EndComp $Comp L power:GND #PWR? U 1 1 5FF70C92 P 2850 6850 F 0 "#PWR?" H 2850 6600 50 0001 C CNN F 1 "GND" H 2855 6677 50 0000 C CNN F 2 "" H 2850 6850 50 0001 C CNN F 3 "" H 2850 6850 50 0001 C CNN 1 2850 6850 1 0 0 -1 $EndComp $Comp L power:+12V #PWR? U 1 1 5FF70C9C P 2100 6450 F 0 "#PWR?" H 2100 6300 50 0001 C CNN F 1 "+12V" H 2115 6623 50 0000 C CNN F 2 "" H 2100 6450 50 0001 C CNN F 3 "" H 2100 6450 50 0001 C CNN 1 2100 6450 1 0 0 -1 $EndComp Wire Wire Line 2100 6450 2350 6450 Wire Wire Line 2650 6450 2850 6450 Wire Wire Line 2850 6550 2850 6450 Connection ~ 2850 6450 Wire Wire Line 2850 6450 3050 6450 Wire Wire Line 3200 7200 3200 7000 Wire Wire Line 3200 7000 3650 7000 Text HLabel 2650 7200 0 50 Input ~ 0 CV_2 Wire Wire Line 2650 7200 3200 7200 $EndSCHEMATC