Technology

Audium’s IP exploits the high peak-to-average-power ratio inherent in an audio signal. An audio amplifier rarely operates at full output power due to the characteristics of an audio signal, together with the dynamic range of a volume control. The company’s technology ultra efficiently amplifies the signal over the entire operating output power range. The system architecture includes techniques to minimize both fixed losses and output-dependant variable losses, and the modulation schemes use low switching rates to minimize switching losses. Power rail switching means that the amplifiers operate efficiently from a low voltage rail most of the time, with a DC-DC boost converter being switched into circuit to drive higher voltage transistors on extreme audio peaks. Existing audio power amplifiers, such as Class D, only achieve optimum efficiency at or near full output power. Audium, therefore, provide a significant power saving advantage.

Applications

• Battery powered MP3 docking station speaker systems
• Totally wireless speakers for home and PC audio
• USB powered speakers
• FPTV
• Sound bars
• Audio for automotive

Product briefs

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