User's Manual

CE910 Family Hardware User Guide
1vv0301010 Rev.11 – 2015-10-27
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
Page 48 of 75
9.1.1. MIC Connection
If a “balanced way” is anyway desired, much more care has to be taken to VMIC noise and ground
noise.
TIP: Since the J-FET transistor inside the microphone acts as RF-detector-amplifier, ask vendor for a
microphone with anti-EMI capacitor (usually a 33pF or a 10pF capacitor placed across the output
terminals inside the case).