diff options
Diffstat (limited to 'kicad/baseband.sch')
| -rw-r--r-- | kicad/baseband.sch | 84 |
1 files changed, 41 insertions, 43 deletions
diff --git a/kicad/baseband.sch b/kicad/baseband.sch index 8c9a7ac..15826a7 100644 --- a/kicad/baseband.sch +++ b/kicad/baseband.sch @@ -233,8 +233,6 @@ Text Notes 1150 700 0 50 ~ 0 HF Freq = \nLO1 - 4.9152MHz Wire Wire Line 3050 1900 2850 1900 -Wire Wire Line - 2850 1900 2850 2850 $Comp L Device:C_Small C306 U 1 1 5E348FC2 @@ -1824,8 +1822,8 @@ Wire Wire Line 1850 1500 1800 1500 Wire Wire Line 600 1550 600 1500 -Text Notes 1200 2250 0 50 ~ 0 -3rd order Elliptic Bandpass\n26MHz - 29.6MHz cutoff\n0.3dB ripple, -40dB stopband\nE12 values +Text Notes 950 2600 0 50 ~ 0 +3rd order Elliptic Bandpass\n26MHz - 29.6MHz cutoff\n0.3dB ripple, -40dB stopband\nE12 values\n\n28 to 32.4 MHz, use same inductors, but\n1nF, 100pF, 150pF, 1nF $Comp L Connector_Generic:Conn_01x03 J301 U 1 1 5E6B38C3 @@ -2343,7 +2341,7 @@ Wire Wire Line Wire Wire Line 7700 6100 8150 6100 Text Notes 1700 7500 0 47 ~ 0 -Handle CW like the uBitx, in the 2nd mixer:\n The BFO as disabled\n The first oscillator is moved to the actual transmit frequency\n A DC bias is fed to the first mixer to upset the balance and allow the first oscillator to leak to the RF power chain.\n The CW sidetone is generated from the Arduino and injected into the audio amplifier\n +Handle CW like the uBitx, in the 2nd mixer:\n The BFO as disabled\n The first oscillator is moved to the actual transmit frequency\n A DC bias is fed to the first mixer to upset the balance and allow the first oscillator to leak to the RF power chain.\n The CW sidetone is generated from the microcontroller and injected into the audio amplifier\n $Comp L Device:C_Small C338 U 1 1 5E55C918 @@ -2363,68 +2361,65 @@ Wire Wire Line 7650 3850 7800 3850 Text Notes 7500 4000 0 50 ~ 0 200mVpp -Text HLabel 950 2850 0 50 Input ~ 0 +Text HLabel 950 3400 0 50 Input ~ 0 CW_KEYn $Comp L Device:R R301 U 1 1 5E5F41C8 -P 1100 2850 -F 0 "R301" V 893 2850 50 0000 C CNN -F 1 "2.2k" V 984 2850 50 0000 C CNN -F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1030 2850 50 0001 C CNN -F 3 "~" H 1100 2850 50 0001 C CNN -F 4 "0" H 1100 2850 50 0001 C CNN "Need_order" - 1 1100 2850 +P 1100 3400 +F 0 "R301" V 893 3400 50 0000 C CNN +F 1 "2.2k" V 984 3400 50 0000 C CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1030 3400 50 0001 C CNN +F 3 "~" H 1100 3400 50 0001 C CNN +F 4 "0" H 1100 3400 50 0001 C CNN "Need_order" + 1 1100 3400 0 1 1 0 $EndComp $Comp L Device:R R302 U 1 1 5E5F4CCC -P 1400 2850 -F 0 "R302" V 1193 2850 50 0000 C CNN -F 1 "1k" V 1284 2850 50 0000 C CNN -F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1330 2850 50 0001 C CNN -F 3 "~" H 1400 2850 50 0001 C CNN -F 4 "0" H 1400 2850 50 0001 C CNN "Need_order" - 1 1400 2850 +P 1400 3400 +F 0 "R302" V 1193 3400 50 0000 C CNN +F 1 "1k" V 1284 3400 50 0000 C CNN +F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1330 3400 50 0001 C CNN +F 3 "~" H 1400 3400 50 0001 C CNN +F 4 "0" H 1400 3400 50 0001 C CNN "Need_order" + 1 1400 3400 0 1 1 0 $EndComp $Comp L Device:C_Small C302 U 1 1 5E5F51BC -P 1250 3000 -F 0 "C302" H 1158 2954 50 0000 R CNN -F 1 "0.1uF" H 1158 3045 50 0000 R CNN -F 2 "Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder" H 1250 3000 50 0001 C CNN -F 3 "~" H 1250 3000 50 0001 C CNN -F 4 "GRM188R71H104KA93D" H 1250 3000 50 0001 C CNN "MPN" -F 5 "0" H 1250 3000 50 0001 C CNN "Need_order" - 1 1250 3000 +P 1250 3550 +F 0 "C302" H 1158 3504 50 0000 R CNN +F 1 "0.1uF" H 1158 3595 50 0000 R CNN +F 2 "Capacitor_SMD:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder" H 1250 3550 50 0001 C CNN +F 3 "~" H 1250 3550 50 0001 C CNN +F 4 "GRM188R71H104KA93D" H 1250 3550 50 0001 C CNN "MPN" +F 5 "0" H 1250 3550 50 0001 C CNN "Need_order" + 1 1250 3550 -1 0 0 1 $EndComp Wire Wire Line - 1250 2900 1250 2850 -Connection ~ 1250 2850 + 1250 3450 1250 3400 +Connection ~ 1250 3400 $Comp L power:GNDA #PWR0302 U 1 1 5E620099 -P 1250 3100 -F 0 "#PWR0302" H 1250 2850 50 0001 C CNN -F 1 "GNDA" H 1255 2927 50 0000 C CNN -F 2 "" H 1250 3100 50 0001 C CNN -F 3 "" H 1250 3100 50 0001 C CNN - 1 1250 3100 +P 1250 3650 +F 0 "#PWR0302" H 1250 3400 50 0001 C CNN +F 1 "GNDA" H 1255 3477 50 0000 C CNN +F 2 "" H 1250 3650 50 0001 C CNN +F 3 "" H 1250 3650 50 0001 C CNN + 1 1250 3650 1 0 0 -1 $EndComp Wire Wire Line 2950 3200 2950 3100 -Text Notes 2400 2850 2 39 ~ 0 +Text Notes 2400 3400 2 39 ~ 0 DC bias to upset mixer\nbalance, to get LO leakage Wire Wire Line - 1550 2850 2850 2850 -Connection ~ 2850 2850 -Wire Wire Line - 2850 2850 2850 3950 + 1550 3400 2850 3400 $Comp L Device:R_POT RV302 U 1 1 5E6EE7AD @@ -3138,8 +3133,6 @@ Wire Wire Line 6050 5800 6950 5800 Wire Wire Line 6050 5800 6050 6500 -Text Notes 6550 -250 0 79 ~ 16 -TODO\ncap in series with MIC?\nwhy cap on RV301 2-3 ?\n Text GLabel 7550 4250 2 50 Input ~ 0 +8VRX Text GLabel 6850 3750 2 50 Input ~ 0 @@ -3160,4 +3153,9 @@ Text GLabel 9150 600 0 50 Input ~ 0 Wire Wire Line 9150 600 9200 600 Connection ~ 9200 600 +Wire Wire Line + 2850 1900 2850 3400 +Connection ~ 2850 3400 +Wire Wire Line + 2850 3400 2850 3950 $EndSCHEMATC |