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Audio line driver saves space in multimedia apps

Posted: 04 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:audio IP solution? line driver? multimedia application?

MIPS Technologies Inc. has launched a new linearized digital audio IP that provides a high-quality, compact line driving solution for a wide range of multimedia applications including DVD players, digital photo frames, STBs and iDTVs.

The new linearized digital audio line driver is a significant addition to MIPS' audio IP solutions. It replaces the traditional Class A/AB line driver, resulting in an area savings of approximately 50 percent, while keeping the same Hi-Fi performance. MIPS achieves this through an innovative technique in linearization of the pulse width modulation output signal. The IP can be implemented standalone or as part of an audio subsystem across multiple process technologies in major foundries.

"It is increasingly common to incorporate analog audio functionality onto SoCs, especially for multimedia applications in mobile devices," said Nuno Ramalho, VP of audio and power solutions, analog business group, MIPS. "Our new line driver technology is a breakthrough that significantly decreases area while keeping the same quality. To-date, MIPS Technologies is the only company supplying this innovative and valuable solution for next-generation SoCs."

MIPS' family of Class-D audio and linearized audio DACs incorporates a complete, high-quality playback channel optimized for low power consumption and longer battery life for a wide array of consumer devices. High-order, over-sampling sigma delta technology is used together with drivers to achieve high efficiency. The channel filters are implemented digitally, embedded in the decimation and interpolation filters associated with the converters. Individual volume control schemes allow maximum flexibility in combining different playback functions. External component requirements are minimal, as no separate external references are required.

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