Revision 1.4
-Replace Bias-T with Howland current source. Add dual supply with +/- 5V LDOs.
-Replace 5.6Ohm resistors with XGL3530 coils and 49.9Ohm resistors
-Use solder pad for LD- connection
-Replace Bias-T with Howland current source. Add dual supply with +/- 5V LDOs.
-Replace 5.6Ohm resistors with XGL3530 coils and 49.9Ohm resistors
-Use solder pad for LD- connection