ROM-Based Noise and Echo Reduction Mono Headset IC
The Broadcom BCM2044S is a monolithic 0.13 μm, single-chip Bluetooth® 2.1 + EDR mono headset solution with very low power consumption. This is the first headset IC in the world that implements SmartAudio™ noise and echo reduction algorithms in an integrated ROM, without the need of an external flash on the BOM; hence significantly reducing the BOM. This ROM solution has been designed to permit the lowest possible BOM for high- and mid-range mono headsets. The ROM contains a default application built on top of the highly interoperable Broadcom BTE-Audio Stack. Sophisticated configurability has been built into the default application allowing customers to differentiate. A small patch RAM space is also provided for last minute code changes prior to production.
The BCM2044S transceiver subsystem delivers a highly integrated radio with superior receiver sensitivity. The performance of this subsystem enables greater range and more robust link performance.
The BCM2044S power management subsystem offers the highest level of integration. This subsystem includes the switching regulator, battery charger, LED drivers, and simple battery monitor. The BCM2044S also employs multiple internal LDO regulators for improving isolation, thereby maintaining high radio performance and excellent audio quality.
