User's Manual

GE910 Hardware User Guide
1vv0300962 Rev.12 2013-10-22
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved
page 47 of 83
Mod. 0805 2011-07 Rev.2
7.4.10. External LNA Enable
The GE910 is already provided by an internal LNA. In case the Application needs to include an
additional LNA stage, the module is provided by a digital signal usable to enable the power
supply of the external amplifier. The signal is set to High only when the GPS receiver is active.
The electrical characteristics of the GPS_LNA_EN signal are:
Level Min [V] Max [V]
Output High Level
1.6 1.9
Output Low Level
0V 0.2
Example of external antenna bias circuitry: