BCM4354 datasheet(64/192 Pages) CYPRESS

номер детали	BCM4354

подробное описание детали	Single-Chip 5G Wi-Fi IEEE 802.11ac 2횞2 MAC/ Baseband/Radio with Integrated Bluetooth 4.1 and FM Receiver

PDF	192 Pages

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производитель	CYPRESS [Cypress Semiconductor]

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64 / 192 page

Audio Features

BCM4354 Data Sheet

BROADCOM CONFIDENTIAL

Broadcom®

October 15, 2014 • 4354-DS109-R

Page 63

Audio Features

A number of features are implemented in the BCM4354 to provide the best possible audio experience for the

user.

• Mono/Stereo Blend or Switch: The BCM4354 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

– Switch: In this mode, the audio switches from full stereo to full mono at a predetermined level to

maintain optimal audio quality. The stereo-to-mono switch point and the mono-to-stereo switch points

are fully programmable to provide the desired amount of audio SNR. In Figure 22, the switch point is

programmed to switch to mono to maintain a 40 dB SNR.

BCM4354 датащи(PDF) 64 Page - Cypress Semiconductor