User guide

CM52 Integrators’ Manual
WI_DEV_CM52_UGD_001-001
Page 46 of 53
CM52 Integrators’ Manual
3.4.4 Loudspeaker path
An application using the analog audio interface must re-reference the AFMS-signal from AGND to
its own internal BIAS. The figure shows a differential implementation. C1 is chosen to create the
correct HP frequency response. R1 and R2 determine the gain, and C2 and R2 determine the LP
frequency response.
0
-
+
0
R1
>=10k
R1
>=10k
R2
R2
C1
C1
C2
C2
BIAS
AFMS
AGND
Internal App +
Internal App -
Figure 28: Loudspeaker Implementation Example
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior written agreement.
Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son autorisation préalable