V1.0 Page 34 of 38 ICM MP CC ST
A35-A36-A40 Company Confidential 09/01
Microphone
Two Microphones can be connected to the EGOLD+ (external/internal) with the Notes
lines HF_MICRO and MICP. Both Microphones are supplied with VMIC from the
EGOLD+(Voiceband E1). To avoid LF distortions, VMIC is low pass filtered R173, C175
and grounded (R170-1, R176).
The internal Microphone is connected to XG170. The capacitors C177,C179 are used
to suppress HF distortions.
The input ports a the EGOLD+ are protected versus DC voltages with the capacitors
C115-C118. An EMC protection is realised by C132,C129.
Voiceband part inside
the EGOLD+
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