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SigmaTel acquires DDX digital amplifier technology

SigmaTel Inc., a mixed-signal multimedia semiconductor company, has acquired the Direct Digital Amplification (DDX) technology, design team and intellectual property from Apogee Technology Inc. for an undisclosed amount. DDX is a class-D digital amplifier technology that converts digital audio directly into power without the need for a DAC. The technology boasts of an all digital solution with a high efficiency level for small form factor designs and low power dissipation than average analog solutions

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