Add RF filter before LDO. Add 470pF for GPS battery input. Remove ballast cap.

All in hopes of reducing RFI.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/telegps.sch b/telegps.sch
index 3bd0dd03d8ace2e4b7735587ffb8558e95605085..afb6ecfe48119e3d170e12efda47113e514ee59e 100644 (file)
--- a/telegps.sch
+++ b/telegps.sch
@@ -37,7 +37,7 @@ T 53200 45500 5 10 0 1 0 0 1
 loadstatus=smt
 }
 N 53000 45500 53000 44700 4
-N 53000 44700 62100 44700 4
+N 53000 44700 64600 44700 4
 N 58700 47100 58700 46100 4
 C 59300 46600 1 270 0 battery.sym
 {
@@ -61,101 +61,81 @@ T 59300 46600 5 10 0 1 0 0 1
 device=CONNECTOR
 }
 N 58700 45200 58700 44700 4
-N 62100 44700 62100 46200 4
-N 60200 47100 61000 47100 4
+N 64600 44700 64600 46200 4
+N 61800 47100 63500 47100 4
 {
-T 60300 47200 5 10 1 1 0 0 1
+T 62800 47200 5 10 1 1 0 0 1
 netname=v_lipo
 }
 N 59500 46600 59500 47100 4
 N 59500 45900 59500 44700 4
-N 61000 46700 60900 46700 4
-N 60900 46700 60900 47100 4
-C 66300 47100 1 0 0 3.3V-plus.sym
-N 63100 47100 66500 47100 4
-C 66400 45900 1 0 0 gnd.sym
+N 63500 46700 63400 46700 4
+N 63400 46700 63400 47100 4
+C 67050 47100 1 0 0 3.3V-plus.sym
+N 65600 47100 67250 47100 4
 N 57500 47100 59800 47100 4
 {
 T 58900 47200 5 10 1 1 0 0 1
 netname=v_charge
 }
-C 64600 46200 1 90 0 capacitor.sym
+C 67100 46200 1 90 0 capacitor.sym
 {
-T 63900 46400 5 10 0 0 90 0 1
+T 66400 46400 5 10 0 0 90 0 1
 device=CAPACITOR
-T 64900 47000 5 10 1 1 180 0 1
+T 67400 47000 5 10 1 1 180 0 1
 refdes=C37
-T 63700 46400 5 10 0 0 90 0 1
+T 66200 46400 5 10 0 0 90 0 1
 symversion=0.1
-T 64500 46300 5 10 1 1 0 0 1
+T 67000 46300 5 10 1 1 0 0 1
 value=1uF
-T 64600 46200 5 10 0 0 0 0 1
+T 67100 46200 5 10 0 0 0 0 1
 vendor_part_number=490-1320-1-ND
-T 64600 46200 5 10 0 0 0 0 1
+T 67100 46200 5 10 0 0 0 0 1
 footprint=0402
-T 64600 46200 5 10 0 0 0 0 1
+T 67100 46200 5 10 0 0 0 0 1
 vendor=digikey
-T 64600 46200 5 10 0 1 0 0 1
+T 67100 46200 5 10 0 1 0 0 1
 loadstatus=smt
 }
-C 64300 45900 1 0 0 gnd.sym
-C 66700 46200 1 90 0 capacitor.sym
+C 66800 45900 1 0 0 gnd.sym
+C 65700 46700 1 270 0 capacitor.sym
 {
-T 66000 46400 5 10 0 0 90 0 1
+T 66400 46500 5 10 0 0 270 0 1
 device=CAPACITOR
-T 67050 46950 5 10 1 1 180 0 1
-refdes=C40
-T 65800 46400 5 10 0 0 90 0 1
-symversion=0.1
-T 66700 46200 5 10 0 0 90 0 1
-footprint=1206
-T 66700 46200 5 10 0 0 90 0 1
-vendor_part_number=490-4512-1-ND
-T 67200 46500 5 10 1 1 180 0 1
-value=100uF
-T 66700 46200 5 10 0 0 0 0 1
-vendor=digikey
-T 66700 46200 5 10 0 1 0 0 1
-loadstatus=smt
-}
-C 63200 46700 1 270 0 capacitor.sym
-{
-T 63900 46500 5 10 0 0 270 0 1
-device=CAPACITOR
-T 63600 46500 5 10 1 1 0 0 1
+T 66100 46500 5 10 1 1 0 0 1
 refdes=C38
-T 64100 46500 5 10 0 0 270 0 1
+T 66600 46500 5 10 0 0 270 0 1
 symversion=0.1
-T 63600 45900 5 10 1 1 0 0 1
+T 66100 45900 5 10 1 1 0 0 1
 value=10nF
-T 63200 46700 5 10 0 0 270 0 1
+T 65700 46700 5 10 0 0 270 0 1
 vendor_part_number=709-1132-1-ND
-T 63200 46700 5 10 0 0 270 0 1
+T 65700 46700 5 10 0 0 270 0 1
 footprint=0402
-T 63200 46700 5 10 0 0 270 0 1
+T 65700 46700 5 10 0 0 270 0 1
 vendor=digikey
-T 63200 46700 5 10 0 1 270 0 1
+T 65700 46700 5 10 0 1 270 0 1
 loadstatus=noload
 }
-C 61000 46200 1 0 0 TC2185.sym
+C 63500 46200 1 0 0 TC2185.sym
 {
-T 61295 47395 5 10 1 1 0 0 1
+T 63795 47395 5 10 1 1 0 0 1
 refdes=U1
-T 61595 46895 5 10 0 1 0 0 1
+T 64095 46895 5 10 0 1 0 0 1
 device=IC
-T 60995 46195 5 10 0 1 0 0 1
+T 63495 46195 5 10 0 1 0 0 1
 footprint=SOT23-5
-T 61800 47400 5 10 1 1 0 0 1
+T 64300 47400 5 10 1 1 0 0 1
 value=TC2185-3.3
-T 61000 46200 5 10 0 0 0 0 1
+T 63500 46200 5 10 0 0 0 0 1
 vendor=digikey
-T 61000 46200 5 10 0 0 0 0 1
+T 63500 46200 5 10 0 0 0 0 1
 vendor_part_number=TC2185-3.3VCCT-ND
-T 61000 46200 5 10 0 0 0 0 1
+T 63500 46200 5 10 0 0 0 0 1
 loadstatus=smt
 }
-C 63300 45500 1 0 0 gnd.sym
-N 63100 46700 63400 46700 4
+C 65800 45500 1 0 0 gnd.sym
+N 65600 46700 65900 46700 4
 C 55100 46100 1 0 0 MCP73831.sym
 {
 T 56295 47695 5 10 0 1 0 0 1
@@ -213,27 +193,27 @@ vendor=digikey
 T 58900 45200 5 10 0 1 0 0 1
 loadstatus=smt
 }
-C 60700 45200 1 90 0 capacitor.sym
+C 63200 45600 1 90 0 capacitor.sym
 {
-T 60000 45400 5 10 0 0 90 0 1
+T 62500 45800 5 10 0 0 90 0 1
 device=CAPACITOR
-T 61000 46000 5 10 1 1 180 0 1
+T 63500 46400 5 10 1 1 180 0 1
 refdes=C39
-T 59800 45400 5 10 0 0 90 0 1
+T 62300 45800 5 10 0 0 90 0 1
 symversion=0.1
-T 60600 45300 5 10 1 1 0 0 1
+T 63100 45700 5 10 1 1 0 0 1
 value=1uF
-T 60700 45200 5 10 0 0 0 0 1
+T 63200 45600 5 10 0 0 0 0 1
 vendor_part_number=490-1320-1-ND
-T 60700 45200 5 10 0 0 0 0 1
+T 63200 45600 5 10 0 0 0 0 1
 footprint=0402
-T 60700 45200 5 10 0 0 0 0 1
+T 63200 45600 5 10 0 0 0 0 1
 vendor=digikey
-T 60700 45200 5 10 0 1 0 0 1
+T 63200 45600 5 10 0 1 0 0 1
 loadstatus=smt
 }
-N 60500 46100 60500 47100 4
-N 60500 45200 60500 44700 4
+N 63000 46500 63000 47100 4
+N 63000 45600 63000 44700 4
 C 54000 46100 1 180 1 led2.sym
 {
 T 53850 45500 5 10 1 1 180 6 1
@@ -1790,7 +1770,6 @@ T 60300 47400 5 10 0 1 0 0 1
 vendor_part_number=A98333-ND
 }
 N 59800 47400 59800 47100 4
-N 60200 47400 60200 47100 4
 N 79000 64000 78700 64000 4
 C 54900 77700 1 0 0 capacitor.sym
 {
@@ -2036,9 +2015,9 @@ C 71500 76500 1 0 0 3.3V-plus.sym
 N 72200 75400 71500 75400 4
 N 71700 75400 71700 76500 4
 N 72200 75800 71700 75800 4
-N 70500 71800 69100 71800 4
+N 69700 71800 68300 71800 4
 {
-T 69100 71900 5 10 1 1 0 0 1
+T 68300 71900 5 10 1 1 0 0 1
 netname=v_charge
 }
 N 70800 74200 72200 74200 4
@@ -2074,24 +2053,24 @@ N 74600 70900 74600 71000 4
 N 74200 70900 73800 70900 4
 N 73800 70900 73800 71000 4
 C 78200 74600 1 0 0 gnd.sym
-C 71400 71900 1 180 0 resistor.sym
+C 70600 71900 1 180 0 resistor.sym
 {
-T 71100 71500 5 10 0 0 180 0 1
+T 70300 71500 5 10 0 0 180 0 1
 device=RESISTOR
-T 71400 71900 5 10 0 1 180 0 1
+T 70600 71900 5 10 0 1 180 0 1
 footprint=0402
-T 71400 71900 5 10 0 1 180 0 1
+T 70600 71900 5 10 0 1 180 0 1
 vendor=digikey
-T 71400 71900 5 10 0 1 180 0 1
+T 70600 71900 5 10 0 1 180 0 1
 vendor_part_number=RHM56.0KLCT-ND
-T 71400 71900 5 10 0 1 90 0 1
+T 70600 71900 5 10 0 1 90 0 1
 loadstatus=smt
-T 70500 72000 5 10 1 1 0 0 1
+T 69700 72000 5 10 1 1 0 0 1
 refdes=R6
-T 71100 72000 5 10 1 1 0 0 1
+T 70300 72000 5 10 1 1 0 0 1
 value=56k
 }
-N 71400 71800 72200 71800 4
+N 70600 71800 72200 71800 4
 C 70600 75300 1 0 0 resistor.sym
 {
 T 70900 75700 5 10 0 0 0 0 1
@@ -2115,7 +2094,7 @@ GPS
 T 78600 73900 9 10 1 0 0 0 2
 u-blox suggests L5 be
 Murata LQG15HS27NJ02
-T 69800 70300 9 10 1 0 0 0 6
+T 69000 70300 9 10 1 0 0 0 6
 v_charge can be 4.2 volts
 v_bckp must be 1.4 - 3.6 volts
 i_bckp on the order of 22uA
@@ -2260,3 +2239,65 @@ loadstatus=smt
 T 47800 51700 5 10 0 1 0 0 1
 symversion=0.1
 }
+C 71600 70600 1 0 0 gnd.sym
+C 71500 71800 1 270 0 capacitor.sym
+{
+T 72200 71600 5 10 0 0 270 0 1
+device=CAPACITOR
+T 71500 71800 5 10 0 0 270 0 1
+vendor_part_number=311-1028-1-ND
+T 71500 71800 5 10 0 0 270 0 1
+footprint=0402
+T 71500 71800 5 10 0 0 270 0 1
+vendor=digikey
+T 71500 71800 5 10 0 1 0 0 1
+loadstatus=smt
+T 71500 71800 5 10 0 1 0 0 1
+symversion=0.1
+T 71800 71500 5 10 1 1 0 0 1
+refdes=C35
+T 71800 71000 5 10 1 1 0 0 1
+value=470pF
+}
+C 60900 47000 1 0 0 inductor.sym
+{
+T 61100 47500 5 10 0 0 0 0 1
+device=INDUCTOR
+T 61100 47700 5 10 0 0 0 0 1
+symversion=0.1
+T 60900 47000 5 10 0 1 0 0 1
+footprint=1007
+T 60900 47000 5 10 0 1 0 0 1
+loadstatus=throughhole
+T 60900 47000 5 10 0 1 0 0 1
+vendor=digikey
+T 60900 47000 5 10 0 1 0 0 1
+vendor_part_number=587-2052-1-ND
+T 61000 47300 5 10 1 1 0 0 1
+refdes=L9
+T 61300 47300 5 10 1 1 0 0 1
+value=10uH
+}
+C 62200 45600 1 90 0 capacitor.sym
+{
+T 61500 45800 5 10 0 0 90 0 1
+device=CAPACITOR
+T 61300 45800 5 10 0 0 90 0 1
+symversion=0.1
+T 62200 45600 5 10 0 1 0 0 1
+footprint=0402
+T 62200 45600 5 10 0 1 0 0 1
+loadstatus=smt
+T 62200 45600 5 10 0 1 0 0 1
+vendor_part_number=399-3027-1-ND
+T 62200 45600 5 10 0 1 0 0 1
+vendor=digikey
+T 62400 46300 5 10 1 1 180 0 1
+refdes=C41
+T 62100 45700 5 10 1 1 0 0 1
+value=0.1uF
+}
+N 60900 47100 60200 47100 4
+N 60200 47100 60200 47400 4
+N 62000 47100 62000 46500 4
+N 62000 45600 62000 44700 4