Loudspeaker Path; Figure 28: Loudspeakeri - Wavecom CM52 Integrator's Manual

Loudspeaker path

3.4.4
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.
CM52 Integrators' Manual
WI_DEV_CM52_UGD_001-001
Page 46 of 53
C1
AFMS
AGND
C1
Figure 28: Loudspeaker Implementation Example
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C2
R2
R1
>=10k
-
+
R1
R2
>=10k
C2
CM52 Integrators' Manual
0
Internal App +
0
Internal App -
BIAS