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Diffstat (limited to 'kicad/pre_amp.sch')
| -rw-r--r-- | kicad/pre_amp.sch | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/kicad/pre_amp.sch b/kicad/pre_amp.sch new file mode 100644 index 0000000..59bc758 --- /dev/null +++ b/kicad/pre_amp.sch @@ -0,0 +1,287 @@ +EESchema Schematic File Version 4 +EELAYER 30 0 +EELAYER END +$Descr A4 11693 8268 +encoding utf-8 +Sheet 2 2 +Title "MMBT3904 amp for IF picardy" +Date "2020-12-08" +Rev "1" +Comp "HB9EGM" +Comment1 "Expected around 20dB gain" +Comment2 "See Experimental Methods in RF Design" +Comment3 "by W7ZOI KK7B W7PUA" +Comment4 "Page 2.20" +$EndDescr +$Comp +L Device:C C? +U 1 1 5FD0A9C5 +P 3250 3500 +F 0 "C?" V 2998 3500 50 0000 C CNN +F 1 "100nF" V 3089 3500 50 0000 C CNN +F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 3288 3350 50 0001 C CNN +F 3 "~" H 3250 3500 50 0001 C CNN + 1 3250 3500 + 0 1 1 0 +$EndComp +$Comp +L Device:R R? +U 1 1 5FD0AF39 +P 3500 3750 +F 0 "R?" H 3430 3704 50 0000 R CNN +F 1 "1k" H 3430 3795 50 0000 R CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3430 3750 50 0001 C CNN +F 3 "~" H 3500 3750 50 0001 C CNN + 1 3500 3750 + -1 0 0 1 +$EndComp +$Comp +L Device:R R? +U 1 1 5FD0B5C9 +P 3500 3250 +F 0 "R?" H 3430 3204 50 0000 R CNN +F 1 "1k3" H 3430 3295 50 0000 R CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3430 3250 50 0001 C CNN +F 3 "~" H 3500 3250 50 0001 C CNN + 1 3500 3250 + -1 0 0 1 +$EndComp +$Comp +L Device:R R? +U 1 1 5FD0B931 +P 3950 2600 +F 0 "R?" V 4157 2600 50 0000 C CNN +F 1 "3k" V 4066 2600 50 0000 C CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 3880 2600 50 0001 C CNN +F 3 "~" H 3950 2600 50 0001 C CNN + 1 3950 2600 + 0 -1 -1 0 +$EndComp +$Comp +L Device:C C? +U 1 1 5FD0BC6A +P 3950 2950 +F 0 "C?" V 3698 2950 50 0000 C CNN +F 1 "100nF" V 3789 2950 50 0000 C CNN +F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 3988 2800 50 0001 C CNN +F 3 "~" H 3950 2950 50 0001 C CNN + 1 3950 2950 + 0 1 1 0 +$EndComp +$Comp +L power:GND #PWR? +U 1 1 5FD0CB14 +P 3500 4000 +F 0 "#PWR?" H 3500 3750 50 0001 C CNN +F 1 "GND" H 3505 3827 50 0000 C CNN +F 2 "" H 3500 4000 50 0001 C CNN +F 3 "" H 3500 4000 50 0001 C CNN + 1 3500 4000 + 1 0 0 -1 +$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 +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 +$Comp +L Transistor_BJT:MMBT3904 Q? +U 1 1 5FD0DCD0 +P 4450 3500 +F 0 "Q?" H 4641 3546 50 0000 L CNN +F 1 "MMBT3904" H 4641 3455 50 0000 L CNN +F 2 "Package_TO_SOT_SMD:SOT-23" H 4650 3425 50 0001 L CIN +F 3 "https://www.onsemi.com/pub/Collateral/2N3903-D.PDF" H 4450 3500 50 0001 L CNN + 1 4450 3500 + 1 0 0 -1 +$EndComp +Wire Wire Line + 4250 3500 3500 3500 +$Comp +L Device:R R? +U 1 1 5FD0E6C3 +P 4550 4000 +F 0 "R?" H 4480 3954 50 0000 R CNN +F 1 "68" H 4480 4045 50 0000 R CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 4480 4000 50 0001 C CNN +F 3 "~" H 4550 4000 50 0001 C CNN + 1 4550 4000 + -1 0 0 1 +$EndComp +$Comp +L Device:R R? +U 1 1 5FD0EA74 +P 5100 4350 +F 0 "R?" H 5030 4304 50 0000 R CNN +F 1 "5.1" H 5030 4395 50 0000 R CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 5030 4350 50 0001 C CNN +F 3 "~" H 5100 4350 50 0001 C CNN + 1 5100 4350 + -1 0 0 1 +$EndComp +$Comp +L Device:C C? +U 1 1 5FD0EEE3 +P 5100 3950 +F 0 "C?" H 4985 3904 50 0000 R CNN +F 1 "100nF" H 4985 3995 50 0000 R CNN +F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 5138 3800 50 0001 C CNN +F 3 "~" H 5100 3950 50 0001 C CNN + 1 5100 3950 + -1 0 0 1 +$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 +$Comp +L power:GND #PWR? +U 1 1 5FD0FB39 +P 4550 4200 +F 0 "#PWR?" H 4550 3950 50 0001 C CNN +F 1 "GND" H 4555 4027 50 0000 C CNN +F 2 "" H 4550 4200 50 0001 C CNN +F 3 "" H 4550 4200 50 0001 C CNN + 1 4550 4200 + 1 0 0 -1 +$EndComp +$Comp +L power:GND #PWR? +U 1 1 5FD0FE07 +P 5100 4550 +F 0 "#PWR?" H 5100 4300 50 0001 C CNN +F 1 "GND" H 5105 4377 50 0000 C CNN +F 2 "" H 5100 4550 50 0001 C CNN +F 3 "" H 5100 4550 50 0001 C CNN + 1 5100 4550 + 1 0 0 -1 +$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 +$Comp +L Device:C C? +U 1 1 5FD127A2 +P 6100 2750 +F 0 "C?" H 5985 2704 50 0000 R CNN +F 1 "100nF" H 5985 2795 50 0000 R CNN +F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 6138 2600 50 0001 C CNN +F 3 "~" H 6100 2750 50 0001 C CNN + 1 6100 2750 + -1 0 0 1 +$EndComp +$Comp +L Device:Transformer_1P_1S T? +U 1 1 5FD135AC +P 4950 2400 +F 0 "T?" H 4950 1975 50 0000 C CNN +F 1 "9T (19cm) bifilar on T44-6" H 4950 2066 50 0000 C CNN +F 2 "Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical" H 4950 2400 50 0001 C CNN +F 3 "~" H 4950 2400 50 0001 C CNN + 1 4950 2400 + 1 0 0 1 +$EndComp +Connection ~ 4550 2600 +$Comp +L power:GND #PWR? +U 1 1 5FD150AD +P 6100 2900 +F 0 "#PWR?" H 6100 2650 50 0001 C CNN +F 1 "GND" H 6105 2727 50 0000 C CNN +F 2 "" H 6100 2900 50 0001 C CNN +F 3 "" H 6100 2900 50 0001 C CNN + 1 6100 2900 + 1 0 0 -1 +$EndComp +$Comp +L Device:R R? +U 1 1 5FD15352 +P 6550 2600 +F 0 "R?" V 6757 2600 50 0000 C CNN +F 1 "24" V 6666 2600 50 0000 C CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder" V 6480 2600 50 0001 C CNN +F 3 "~" H 6550 2600 50 0001 C CNN + 1 6550 2600 + 0 1 1 0 +$EndComp +$Comp +L power:VCC #PWR? +U 1 1 5FD15AEF +P 6700 2600 +F 0 "#PWR?" H 6700 2450 50 0001 C CNN +F 1 "VCC" V 6715 2727 50 0000 L CNN +F 2 "" H 6700 2600 50 0001 C CNN +F 3 "" H 6700 2600 50 0001 C CNN + 1 6700 2600 + 0 1 1 0 +$EndComp +$Comp +L Device:C C? +U 1 1 5FD18E7E +P 5850 2200 +F 0 "C?" V 5598 2200 50 0000 C CNN +F 1 "100nF" V 5689 2200 50 0000 C CNN +F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 5888 2050 50 0001 C CNN +F 3 "~" H 5850 2200 50 0001 C CNN + 1 5850 2200 + 0 1 1 0 +$EndComp +Wire Wire Line + 5350 2200 5550 2200 +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 +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 +Text HLabel 6150 2200 2 50 Input ~ 0 +OUT +Text HLabel 3100 3500 0 50 Input ~ 0 +IN +Text Notes 5400 3450 0 50 ~ 0 +Around 20dB small signal gain +$EndSCHEMATC |