EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title "MMBT3904 amp for IF picardy"
Date "2020-12-08"
Rev "1"
Comp "HB9EGM"
Comment1 "Expected around 20dB gain"
Comment2 "See Experimental Methods in RF Design"
Comment3 "by W7ZOI KK7B W7PUA"
Comment4 "Page 2.20"
$EndDescr
$Comp
L Connector:Conn_01x03_Female J1
U 1 1 5FD043FA
P 1600 1850
F 0 "J1" H 1492 2135 50  0000 C CNN
F 1 "IN" H 1492 2044 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 1600 1850 50  0001 C CNN
F 3 "~" H 1600 1850 50  0001 C CNN
	1    1600 1850
	-1   0    0    -1  
$EndComp
Text Notes 1550 1950 2    50   ~ 0
IN_SRC\nIN_SINK\n8V
$Comp
L Connector:Conn_01x03_Female J2
U 1 1 5FD05406
P 2850 1850
F 0 "J2" H 2700 2150 50  0000 L CNN
F 1 "OUT" H 2700 2050 50  0000 L CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 2850 1850 50  0001 C CNN
F 3 "~" H 2850 1850 50  0001 C CNN
	1    2850 1850
	1    0    0    -1  
$EndComp
Text Notes 2900 1950 0    50   ~ 0
OUT_SINK\nOUT_SRC\nGND
NoConn ~ 1800 1850
NoConn ~ 1800 1750
$Comp
L power:VCC #PWR01
U 1 1 5FD07A1D
P 1800 1950
F 0 "#PWR01" H 1800 1800 50  0001 C CNN
F 1 "VCC" V 1815 2078 50  0000 L CNN
F 2 "" H 1800 1950 50  0001 C CNN
F 3 "" H 1800 1950 50  0001 C CNN
	1    1800 1950
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR02
U 1 1 5FD09384
P 2650 1950
F 0 "#PWR02" H 2650 1700 50  0001 C CNN
F 1 "GND" V 2655 1822 50  0000 R CNN
F 2 "" H 2650 1950 50  0001 C CNN
F 3 "" H 2650 1950 50  0001 C CNN
	1    2650 1950
	0    1    1    0   
$EndComp
$Comp
L Device:C C1
U 1 1 5FD0A9C5
P 3250 3500
F 0 "C1" V 2998 3500 50  0000 C CNN
F 1 "100nF" V 3089 3500 50  0000 C CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 3288 3350 50  0001 C CNN
F 3 "~" H 3250 3500 50  0001 C CNN
	1    3250 3500
	0    1    1    0   
$EndComp
$Comp
L Device:R R2
U 1 1 5FD0AF39
P 3500 3750
F 0 "R2" H 3430 3704 50  0000 R CNN
F 1 "1k" H 3430 3795 50  0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3430 3750 50  0001 C CNN
F 3 "~" H 3500 3750 50  0001 C CNN
	1    3500 3750
	-1   0    0    1   
$EndComp
$Comp
L Device:R R1
U 1 1 5FD0B5C9
P 3500 3250
F 0 "R1" H 3430 3204 50  0000 R CNN
F 1 "1k3" H 3430 3295 50  0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3430 3250 50  0001 C CNN
F 3 "~" H 3500 3250 50  0001 C CNN
	1    3500 3250
	-1   0    0    1   
$EndComp
$Comp
L Device:R R4
U 1 1 5FD0B931
P 3950 2600
F 0 "R4" V 4157 2600 50  0000 C CNN
F 1 "3k" V 4066 2600 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3880 2600 50  0001 C CNN
F 3 "~" H 3950 2600 50  0001 C CNN
	1    3950 2600
	0    -1   -1   0   
$EndComp
$Comp
L Device:C C3
U 1 1 5FD0BC6A
P 3950 2950
F 0 "C3" V 3698 2950 50  0000 C CNN
F 1 "100nF" V 3789 2950 50  0000 C CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 3988 2800 50  0001 C CNN
F 3 "~" H 3950 2950 50  0001 C CNN
	1    3950 2950
	0    1    1    0   
$EndComp
$Comp
L power:GND #PWR03
U 1 1 5FD0CB14
P 3500 4000
F 0 "#PWR03" H 3500 3750 50  0001 C CNN
F 1 "GND" H 3505 3827 50  0000 C CNN
F 2 "" H 3500 4000 50  0001 C CNN
F 3 "" H 3500 4000 50  0001 C CNN
	1    3500 4000
	1    0    0    -1  
$EndComp
Wire Wire Line
	3500 4000 3500 3900
Wire Wire Line
	3500 3600 3500 3500
Wire Wire Line
	3500 3500 3400 3500
Connection ~ 3500 3500
Wire Wire Line
	3500 3500 3500 3400
Text GLabel 3100 3500 0    50   Input ~ 0
IN
Text GLabel 2650 1850 0    50   Input ~ 0
IN
Text GLabel 2650 1750 0    50   Input ~ 0
OUT
Wire Wire Line
	3800 2950 3500 2950
Wire Wire Line
	3500 2950 3500 3100
Wire Wire Line
	3500 2950 3500 2600
Wire Wire Line
	3500 2600 3800 2600
Connection ~ 3500 2950
$Comp
L Transistor_BJT:MMBT3904 Q1
U 1 1 5FD0DCD0
P 4450 3500
F 0 "Q1" H 4641 3546 50  0000 L CNN
F 1 "MMBT3904" H 4641 3455 50  0000 L CNN
F 2 "Package_TO_SOT_SMD:SOT-23" H 4650 3425 50  0001 L CIN
F 3 "https://www.onsemi.com/pub/Collateral/2N3903-D.PDF" H 4450 3500 50  0001 L CNN
	1    4450 3500
	1    0    0    -1  
$EndComp
Wire Wire Line
	4250 3500 3500 3500
$Comp
L Device:R R5
U 1 1 5FD0E6C3
P 4550 4000
F 0 "R5" H 4480 3954 50  0000 R CNN
F 1 "68" H 4480 4045 50  0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 4480 4000 50  0001 C CNN
F 3 "~" H 4550 4000 50  0001 C CNN
	1    4550 4000
	-1   0    0    1   
$EndComp
$Comp
L Device:R R6
U 1 1 5FD0EA74
P 5100 4350
F 0 "R6" H 5030 4304 50  0000 R CNN
F 1 "5.1" H 5030 4395 50  0000 R CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 5030 4350 50  0001 C CNN
F 3 "~" H 5100 4350 50  0001 C CNN
	1    5100 4350
	-1   0    0    1   
$EndComp
$Comp
L Device:C C4
U 1 1 5FD0EEE3
P 5100 3950
F 0 "C4" H 4985 3904 50  0000 R CNN
F 1 "100nF" H 4985 3995 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 5138 3800 50  0001 C CNN
F 3 "~" H 5100 3950 50  0001 C CNN
	1    5100 3950
	-1   0    0    1   
$EndComp
Wire Wire Line
	5100 3800 4550 3800
Wire Wire Line
	4550 3800 4550 3700
Wire Wire Line
	4550 3850 4550 3800
Connection ~ 4550 3800
$Comp
L power:GND #PWR06
U 1 1 5FD0FB39
P 4550 4200
F 0 "#PWR06" H 4550 3950 50  0001 C CNN
F 1 "GND" H 4555 4027 50  0000 C CNN
F 2 "" H 4550 4200 50  0001 C CNN
F 3 "" H 4550 4200 50  0001 C CNN
	1    4550 4200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR07
U 1 1 5FD0FE07
P 5100 4550
F 0 "#PWR07" H 5100 4300 50  0001 C CNN
F 1 "GND" H 5105 4377 50  0000 C CNN
F 2 "" H 5100 4550 50  0001 C CNN
F 3 "" H 5100 4550 50  0001 C CNN
	1    5100 4550
	1    0    0    -1  
$EndComp
Wire Wire Line
	5100 4550 5100 4500
Wire Wire Line
	4550 4200 4550 4150
Wire Wire Line
	5100 4100 5100 4200
Wire Wire Line
	4100 2600 4550 2600
Wire Wire Line
	4550 2600 4550 2950
Wire Wire Line
	4100 2950 4550 2950
Connection ~ 4550 2950
Wire Wire Line
	4550 2950 4550 3300
$Comp
L Device:C C2
U 1 1 5FD127A2
P 6100 2750
F 0 "C2" H 5985 2704 50  0000 R CNN
F 1 "100nF" H 5985 2795 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6138 2600 50  0001 C CNN
F 3 "~" H 6100 2750 50  0001 C CNN
	1    6100 2750
	-1   0    0    1   
$EndComp
$Comp
L Device:Transformer_1P_1S T1
U 1 1 5FD135AC
P 4950 2400
F 0 "T1" H 4950 1975 50  0000 C CNN
F 1 "9T (19cm) bifilar on T44-6" H 4950 2066 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 4950 2400 50  0001 C CNN
F 3 "~" H 4950 2400 50  0001 C CNN
	1    4950 2400
	1    0    0    1   
$EndComp
Connection ~ 4550 2600
$Comp
L power:GND #PWR05
U 1 1 5FD150AD
P 6100 2900
F 0 "#PWR05" H 6100 2650 50  0001 C CNN
F 1 "GND" H 6105 2727 50  0000 C CNN
F 2 "" H 6100 2900 50  0001 C CNN
F 3 "" H 6100 2900 50  0001 C CNN
	1    6100 2900
	1    0    0    -1  
$EndComp
$Comp
L Device:R R3
U 1 1 5FD15352
P 6550 2600
F 0 "R3" V 6757 2600 50  0000 C CNN
F 1 "24" V 6666 2600 50  0000 C CNN
F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 6480 2600 50  0001 C CNN
F 3 "~" H 6550 2600 50  0001 C CNN
	1    6550 2600
	0    1    1    0   
$EndComp
$Comp
L power:VCC #PWR04
U 1 1 5FD15AEF
P 6700 2600
F 0 "#PWR04" H 6700 2450 50  0001 C CNN
F 1 "VCC" V 6715 2727 50  0000 L CNN
F 2 "" H 6700 2600 50  0001 C CNN
F 3 "" H 6700 2600 50  0001 C CNN
	1    6700 2600
	0    1    1    0   
$EndComp
$Comp
L power:PWR_FLAG #FLG01
U 1 1 5FD168BB
P 1800 1950
F 0 "#FLG01" H 1800 2025 50  0001 C CNN
F 1 "PWR_FLAG" H 1800 2123 50  0001 C CNN
F 2 "" H 1800 1950 50  0001 C CNN
F 3 "~" H 1800 1950 50  0001 C CNN
	1    1800 1950
	-1   0    0    1   
$EndComp
Connection ~ 1800 1950
$Comp
L power:PWR_FLAG #FLG02
U 1 1 5FD18AC6
P 2650 1950
F 0 "#FLG02" H 2650 2025 50  0001 C CNN
F 1 "PWR_FLAG" H 2650 2123 50  0001 C CNN
F 2 "" H 2650 1950 50  0001 C CNN
F 3 "~" H 2650 1950 50  0001 C CNN
	1    2650 1950
	-1   0    0    1   
$EndComp
Connection ~ 2650 1950
$Comp
L Device:C C5
U 1 1 5FD18E7E
P 5850 2200
F 0 "C5" V 5598 2200 50  0000 C CNN
F 1 "100nF" V 5689 2200 50  0000 C CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 5888 2050 50  0001 C CNN
F 3 "~" H 5850 2200 50  0001 C CNN
	1    5850 2200
	0    1    1    0   
$EndComp
Wire Wire Line
	5350 2200 5550 2200
Text GLabel 6150 2200 2    50   Input ~ 0
OUT
Wire Wire Line
	6150 2200 6000 2200
Wire Wire Line
	5350 2600 6100 2600
Connection ~ 6100 2600
Wire Wire Line
	6100 2600 6400 2600
Text Notes 5000 2700 0    79   ~ 0
o
Text Notes 4800 2200 0    79   ~ 0
o
Text Notes 1750 1450 0    50   ~ 0
This matches the IF sockets\nused on Picardy 2020
Wire Wire Line
	4550 2200 4300 2200
Wire Wire Line
	4300 2200 4300 1750
Wire Wire Line
	5550 1750 5550 2200
Wire Wire Line
	4300 1750 5550 1750
Connection ~ 5550 2200
Wire Wire Line
	5550 2200 5700 2200
$EndSCHEMATC