LTE Standard Module Series
EG915U_Series_Hardware_Design 39 / 81
as possible, and the traces should be as short as possible. They should go through the filter capacitors
before arriving at other connection points.
To reduce radio or other signal interference, RF antennas should be placed away from audio interfaces
and audio traces. Power traces should not be parallel with and also should be far away from the audio
traces.
The differential audio traces must be routed according to the differential signal layout rule.
4.1.2. Microphone Interface Design
The microphone channel reference circuit is shown in the following figure.
4.1.3. Receiver Interface Design
The receiver channel reference circuit is shown in the following figure:
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