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matched n-channel mosfets to keep impedance the same between differential paths

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This commit is contained in:
Michael Ossmann
2012-06-27 21:57:07 -06:00
parent 2c43a1d5ed
commit 7ac90cd308
2 changed files with 120 additions and 64 deletions
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2
hardware/bubblegum/bubblegum-cache.lib
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@ -1,4 +1,4 @@
EESchema-LIBRARY Version 2.3 Date: Wed Jun 27 21:51:49 2012 EESchema-LIBRARY Version 2.3 Date: Wed Jun 27 21:56:30 2012
#encoding utf-8 #encoding utf-8
# #
# BALUN # BALUN

182
hardware/bubblegum/bubblegum.sch
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@ -1,4 +1,4 @@
EESchema Schematic File Version 2 date Wed Jun 27 21:51:49 2012 EESchema Schematic File Version 2 date Wed Jun 27 21:56:30 2012
LIBS:power LIBS:power
LIBS:device LIBS:device
LIBS:transistors LIBS:transistors
@ -45,39 +45,27 @@ Comment2 ""
Comment3 "" Comment3 ""
Comment4 "" Comment4 ""
$EndDescr $EndDescr
Wire Wire Line
10900 2550 11000 2550
Wire Wire Line
11000 2550 11000 2450
Wire Wire Line
10500 2250 10600 2250
Wire Wire Line
10600 2250 10600 2350
Wire Wire Line
10050 7250 10050 7350
Wire Wire Line
10050 7350 9950 7350
Wire Wire Line Wire Wire Line
9650 7050 9650 7150 9650 7050 9650 7150
Text Notes 7400 7750 0 40 ~ 0
DC connection to GND required on IF1, IF2?
Text Notes 7700 3450 0 40 ~ 0
DC connection to GND required on RF1, RF2?
NoConn ~ 8100 7000
$Comp
L BALUN T2
U 1 1 4FE35EF4
P 7800 3050
F 0 "T2" H 7800 3300 70 0000 C CNN
F 1 "RX_BALUN" H 7800 2750 70 0000 C CNN
F 4 "Anaren" H 7800 3050 60 0001 C CNN "Manufacturer"
F 5 "B0310J50100AHF" H 7800 3050 60 0001 C CNN "Part Number"
F 6 "Ultra Low Profile 0805 Balun 50 to 100 Balanced" H 7800 3050 60 0001 C CNN "Description"
1 7800 3050
-1 0 0 1
$EndComp
NoConn ~ 8200 3050
Text Notes 11850 1150 0 40 ~ 0
balun here may not not be needed if\ndirect connection to MAX2837 is made
Text Notes 3450 4550 0 40 ~ 0
amplifier will likely\nend up here
Text Notes 2450 6900 0 40 ~ 0
amplifier will likely\nend up here
Wire Wire Line Wire Wire Line
6900 1950 6900 2050 6900 1950 6900 2050
Connection ~ 6300 8050 Connection ~ 6300 8050
Wire Wire Line Wire Wire Line
6300 8050 6550 8050 6300 8050 6550 8050
Wire Wire Line Wire Wire Line
6300 7650 6300 8150 6300 8150 6300 7650
Wire Wire Line Wire Wire Line
6400 5900 6400 6000 6400 5900 6400 6000
Connection ~ 6600 3550 Connection ~ 6600 3550
@ -178,10 +166,10 @@ Wire Wire Line
1250 9400 1500 9400 1250 9400 1500 9400
Connection ~ 7100 5350 Connection ~ 7100 5350
Wire Wire Line Wire Wire Line
7000 5350 7550 5350 7550 5350 7000 5350
Connection ~ 7700 4150 Connection ~ 7700 4150
Wire Wire Line Wire Wire Line
7600 4150 8150 4150 8150 4150 7600 4150
Connection ~ 1950 6250 Connection ~ 1950 6250
Wire Wire Line Wire Wire Line
1750 6250 2250 6250 1750 6250 2250 6250
@ -201,11 +189,11 @@ Wire Wire Line
2550 4750 2550 4550 2550 4750 2550 4550
Connection ~ 2650 3550 Connection ~ 2650 3550
Wire Wire Line Wire Wire Line
2650 3650 2650 3450 2650 3450 2650 3650
Wire Wire Line Wire Wire Line
2850 3550 2650 3550 2850 3550 2650 3550
Wire Wire Line Wire Wire Line
4150 2250 4150 1950 4150 1950 4150 2250
Connection ~ 4050 3500 Connection ~ 4050 3500
Wire Wire Line Wire Wire Line
3800 3500 4050 3500 3800 3500 4050 3500
@ -269,13 +257,13 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
14100 5750 14100 6050 14100 5750 14100 6050
Wire Wire Line Wire Wire Line
12750 5250 13500 5250 13500 5250 12750 5250
Connection ~ 14100 5250 Connection ~ 14100 5250
Wire Wire Line Wire Wire Line
14100 5350 14100 5250 14100 5350 14100 5250
Connection ~ 13400 5250 Connection ~ 13400 5250
Wire Wire Line Wire Wire Line
13100 5350 13100 5250 13100 5250 13100 5350
Wire Wire Line Wire Wire Line
11450 3950 11450 4050 11450 3950 11450 4050
Wire Wire Line Wire Wire Line
@ -375,8 +363,6 @@ Wire Wire Line
13550 8900 13550 9300 13550 8900 13550 9300
Wire Wire Line Wire Wire Line
7850 5050 7850 5150 7850 5050 7850 5150
Wire Wire Line
9800 2050 9800 2150
Wire Wire Line Wire Wire Line
9800 4650 9800 4850 9800 4650 9800 4850
Wire Wire Line Wire Wire Line
@ -403,7 +389,7 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
8150 4750 7700 4750 8150 4750 7700 4750
Wire Wire Line Wire Wire Line
8450 4350 8450 4550 8450 4550 8450 4350
Connection ~ 9500 4150 Connection ~ 9500 4150
Wire Wire Line Wire Wire Line
9350 4150 9500 4150 9350 4150 9500 4150
@ -473,7 +459,7 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
4250 3250 4250 3150 4250 3250 4250 3150
Wire Wire Line Wire Wire Line
1550 5150 1750 5150 1750 5150 1550 5150
Wire Wire Line Wire Wire Line
1650 5850 1650 5750 1650 5850 1650 5750
Wire Wire Line Wire Wire Line
@ -483,7 +469,7 @@ Wire Wire Line
950 5450 850 5450 950 5450 850 5450
Connection ~ 850 5450 Connection ~ 850 5450
Wire Wire Line Wire Wire Line
1550 3450 1750 3450 1750 3450 1550 3450
Wire Wire Line Wire Wire Line
850 4050 850 3650 850 4050 850 3650
Wire Wire Line Wire Wire Line
@ -564,7 +550,7 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
7850 6250 7850 6150 7850 6250 7850 6150
Wire Wire Line Wire Wire Line
7850 5750 7850 5550 7850 5550 7850 5750
Wire Wire Line Wire Wire Line
7100 5950 7550 5950 7100 5950 7550 5950
Wire Wire Line Wire Wire Line
@ -584,10 +570,10 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
9500 4950 10850 4950 9500 4950 10850 4950
Wire Wire Line Wire Wire Line
9650 6450 9650 5850 9650 5850 9650 6450
Connection ~ 9650 6350 Connection ~ 9650 6350
Wire Wire Line Wire Wire Line
9800 2750 9800 4250 9800 4250 9800 2250
Connection ~ 9800 2850 Connection ~ 9800 2850
Wire Wire Line Wire Wire Line
12750 8700 12850 8700 12750 8700 12850 8700
@ -624,7 +610,7 @@ Wire Wire Line
10600 6150 10600 6050 10600 6150 10600 6050
Connection ~ 10600 6050 Connection ~ 10600 6050
Wire Wire Line Wire Wire Line
10300 6750 10300 6550 10300 6550 10300 6750
Wire Wire Line Wire Wire Line
10600 6550 10600 6650 10600 6550 10600 6650
Connection ~ 10600 6650 Connection ~ 10600 6650
@ -663,12 +649,12 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
12150 3950 12150 4050 12150 3950 12150 4050
Wire Wire Line Wire Wire Line
12750 4850 15400 4850 15400 4850 12750 4850
Wire Wire Line Wire Wire Line
13400 5250 13400 5350 13400 5350 13400 5250
Connection ~ 13100 5250 Connection ~ 13100 5250
Wire Wire Line Wire Wire Line
14000 5250 14200 5250 14200 5250 14000 5250
Wire Wire Line Wire Wire Line
14800 5350 14800 5250 14800 5350 14800 5250
Wire Wire Line Wire Wire Line
@ -731,17 +717,17 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
16100 4850 16100 4750 16100 4850 16100 4750
Wire Wire Line Wire Wire Line
3250 8150 3250 7800 3250 7800 3250 8150
Wire Wire Line Wire Wire Line
3150 6700 3350 6700 3150 6700 3350 6700
Wire Wire Line Wire Wire Line
3350 6900 3350 6600 3350 6600 3350 6900
Connection ~ 3350 6700 Connection ~ 3350 6700
Wire Wire Line Wire Wire Line
7150 2050 6700 2050 7150 2050 6700 2050
Connection ~ 6900 2050 Connection ~ 6900 2050
Wire Wire Line Wire Wire Line
4050 3600 4050 3150 4050 3150 4050 3600
Wire Wire Line Wire Wire Line
4150 1450 4150 1550 4150 1450 4150 1550
Wire Wire Line Wire Wire Line
@ -854,9 +840,9 @@ Wire Wire Line
Wire Wire Line Wire Wire Line
8200 7600 8750 7600 8200 7600 8750 7600
Wire Wire Line Wire Wire Line
6600 3650 6600 3150 6600 3150 6600 3650
Wire Wire Line Wire Wire Line
6400 6400 6400 6750 6400 6750 6400 6400
Wire Wire Line Wire Wire Line
6650 6500 6400 6500 6650 6500 6400 6500
Connection ~ 6400 6500 Connection ~ 6400 6500
@ -866,6 +852,74 @@ Wire Wire Line
2650 4650 3400 4650 2650 4650 3400 4650
Wire Wire Line Wire Wire Line
3400 4650 3400 3150 3400 4650 3400 3150
Wire Wire Line
9650 7550 9650 7650
Wire Wire Line
10600 2850 10600 2750
Wire Wire Line
9800 2250 9900 2250
$Comp
L VCC #PWR?
U 1 1 4FEBD54F
P 11000 2450
F 0 "#PWR?" H 11000 2550 30 0001 C CNN
F 1 "VCC" H 11000 2550 30 0000 C CNN
1 11000 2450
1 0 0 -1
$EndComp
$Comp
L MOSFET_N Q?
U 1 1 4FEBD52A
P 10700 2550
F 0 "Q?" H 10710 2720 60 0000 R CNN
F 1 "MOSFET_N" H 10710 2400 60 0000 R CNN
F 4 "DMN2300UFB4" H 10700 2550 60 0001 C CNN "Part Number"
1 10700 2550
-1 0 0 -1
$EndComp
$Comp
L VCC #PWR?
U 1 1 4FEBD516
P 10050 7250
F 0 "#PWR?" H 10050 7350 30 0001 C CNN
F 1 "VCC" H 10050 7350 30 0000 C CNN
1 10050 7250
1 0 0 -1
$EndComp
$Comp
L MOSFET_N Q?
U 1 1 4FEBD4FB
P 9750 7350
F 0 "Q?" H 9760 7520 60 0000 R CNN
F 1 "MOSFET_N" H 9760 7200 60 0000 R CNN
F 4 "DMN2300UFB4" H 9750 7350 60 0001 C CNN "Part Number"
1 9750 7350
-1 0 0 -1
$EndComp
Text Notes 7400 7750 0 40 ~ 0
DC connection to GND required on IF1, IF2?
Text Notes 7700 3450 0 40 ~ 0
DC connection to GND required on RF1, RF2?
NoConn ~ 8100 7000
$Comp
L BALUN T2
U 1 1 4FE35EF4
P 7800 3050
F 0 "T2" H 7800 3300 70 0000 C CNN
F 1 "RX_BALUN" H 7800 2750 70 0000 C CNN
F 4 "Anaren" H 7800 3050 60 0001 C CNN "Manufacturer"
F 5 "B0310J50100AHF" H 7800 3050 60 0001 C CNN "Part Number"
F 6 "Ultra Low Profile 0805 Balun 50 to 100 Balanced" H 7800 3050 60 0001 C CNN "Description"
1 7800 3050
-1 0 0 1
$EndComp
NoConn ~ 8200 3050
Text Notes 11850 1150 0 40 ~ 0
balun here may not not be needed if\ndirect connection to MAX2837 is made
Text Notes 3450 4550 0 40 ~ 0
amplifier will likely\nend up here
Text Notes 2450 6900 0 40 ~ 0
amplifier will likely\nend up here
Text Notes 4750 2750 0 60 ~ 0 Text Notes 4750 2750 0 60 ~ 0
switchable image reject filters switchable image reject filters
Text Notes 4100 7350 0 60 ~ 0 Text Notes 4100 7350 0 60 ~ 0
@ -1973,10 +2027,10 @@ $EndComp
$Comp $Comp
L GND #PWR66 L GND #PWR66
U 1 1 4FE0EFAF U 1 1 4FE0EFAF
P 9650 7150 P 9650 7650
F 0 "#PWR66" H 9650 7150 30 0001 C CNN F 0 "#PWR66" H 9650 7650 30 0001 C CNN
F 1 "GND" H 9650 7080 30 0001 C CNN F 1 "GND" H 9650 7580 30 0001 C CNN
1 9650 7150 1 9650 7650
1 0 0 -1 1 0 0 -1
$EndComp $EndComp
$Comp $Comp
@ -2030,6 +2084,7 @@ U 1 1 4FE0EEDB
P 7750 5950 P 7750 5950
F 0 "Q4" H 7760 6120 60 0000 R CNN F 0 "Q4" H 7760 6120 60 0000 R CNN
F 1 "MOSFET_N" H 7760 5800 60 0000 R CNN F 1 "MOSFET_N" H 7760 5800 60 0000 R CNN
F 4 "DMN2300UFB4" H 7750 5950 60 0001 C CNN "Part Number"
1 7750 5950 1 7750 5950
1 0 0 -1 1 0 0 -1
$EndComp $EndComp
@ -2070,6 +2125,7 @@ U 1 1 4FE0EE1A
P 8350 4750 P 8350 4750
F 0 "Q2" H 8360 4920 60 0000 R CNN F 0 "Q2" H 8360 4920 60 0000 R CNN
F 1 "MOSFET_N" H 8360 4600 60 0000 R CNN F 1 "MOSFET_N" H 8360 4600 60 0000 R CNN
F 4 "DMN2300UFB4" H 8350 4750 60 0001 C CNN "Part Number"
1 8350 4750 1 8350 4750
1 0 0 -1 1 0 0 -1
$EndComp $EndComp
@ -2085,20 +2141,20 @@ $EndComp
$Comp $Comp
L GND #PWR16 L GND #PWR16
U 1 1 4FE0EDCF U 1 1 4FE0EDCF
P 9800 2050 P 10600 2850
F 0 "#PWR16" H 9800 2050 30 0001 C CNN F 0 "#PWR16" H 10600 2850 30 0001 C CNN
F 1 "GND" H 9800 1980 30 0001 C CNN F 1 "GND" H 10600 2780 30 0001 C CNN
1 9800 2050 1 10600 2850
-1 0 0 1 1 0 0 -1
$EndComp $EndComp
$Comp $Comp
L INDUCTOR L3 L INDUCTOR L3
U 1 1 4FE0EDC7 U 1 1 4FE0EDC7
P 9800 2450 P 10200 2250
F 0 "L3" V 9750 2450 40 0000 C CNN F 0 "L3" V 10150 2250 40 0000 C CNN
F 1 "INDUCTOR" V 9900 2450 40 0000 C CNN F 1 "INDUCTOR" V 10300 2250 40 0000 C CNN
1 9800 2450 1 10200 2250
1 0 0 -1 0 1 1 0
$EndComp $EndComp
$Comp $Comp
L INDUCTOR L4 L INDUCTOR L4