National Semiconductor Introduces LM49155 Analog Audio Subsystem with Integrated Noise Reduction

By pur, Thursday, July 29th, 2010
Category: Signal Processing

The LM49155 is the industry’s first analog audio subsystem with integrated noise reduction for use in smartphones and full-featured phones.The LM49155 dramatically improves the talker’s voice-signal-to-background-noise ratio while retaining natural speech quality. Phone users can now enjoy clearer voice calls in noisy environments on both transmit and receive ends of the communications link. The LM49155 also enables increased accuracy of voice recognition systems by minimizing background noise.

LM49155

LM49155 Analog Audio Subsystem with Integrated Noise Reduction
(Photo from National Semiconductor Website)

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National’s LM49155 analog audio subsystem provides uplink noise suppression and downlink signal-to-noise ratio (SNR) enhancement in an ultra-small 36-bump micro SMD package measuring 3.4 mm by 3.4 mm. The subsystem includes a high-efficiency, 1.35W Class D speaker driver with automatic level control (ALC), ground-referenced headphone amplifier with click-pop suppression, and mixing and volume control.

More information about Analog Audio Subsystem with Integrated Noise Reduction can be found at National Semiconductor Website


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