BCM4339 Preliminary Data Sheet
Audio Features
Audio Features
A number of features are implemented in the BCM4339 to provide the best possible audio experience for the
user.
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Mono/Stereo Blend or Switch—The BCM4339 provides automatic control of the stereo or mono settings
based on the FM signal carrier-to-noise ratio (C/N). This feature is used to maintain the best possible audio
SNR based on the FM channel condition. Two modes of operation are supported:
– Blend: In this mode, fine control of stereo separation is used to achieve optimal audio quality over a
wide range of input C/N. The amount of separation is fully programmable. In Figure 21, the separation is
programmed to maintain a minimum 50 dB SNR across the blend range.
– Extended blend: In this mode, stereo separation is maximized across a wide range of input CNR.
Broadcom static suppression typically gives a static-free user experience to within 3 dB of ultimate
sensitivity.
Figure 21: Example Blend/Switch Usage
Broadcom®
November 17, 2014 • 4339-DS106-R
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