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Telit GE863-GPS
Hardware User guide
1vv0300714, Rev. ISSUE#0, - 21/02/06
Reproduction forbidden without Telit Communication written authorization – All Right reserved – Right of modification reserved page 37 of 76
NOTE: The microphone sensitivity changes with the value of R2 and R3. Usually the microphones
are characterized with 2kΩ biasing resistance, so try to keep the sum of R2 and R3 around 2kΩ.
Refer to your microphone manufacturer for the mic. characteristics.