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right SigmaTel (SGTL delisted from NASDAQ after 2008 acquisition by Freescale Semiconductor) was a System On a Chip SOC electronics and software company headquartered in Austin, Texas, that designed AV media player/recorder SOCs, reference circuit boards, SOC Software Development Kits built around a custom cooperative kernel and all SOC device drivers including USB Mass Storage and AV decoder DSP, media player/recorder software apps, and controller chips for multifunction peripherals. SigmaTel became Austin's largest IPO as of 2003 when it became publicly traded on NASDAQ. The company was driven by a talented mix of electrical and computer engineers plus other professionals with semiconductor industry experience in Silicon Hills, the number two IC design region in the United States, after Silicon Valley. ==History== In 2004, SigmaTel SoCs were found in over 70% of all flash memory based MP3 devices sold in the global market. However, SigmaTel lost its last iPod socket in 2006 when it was not found in the next-generation iPod Shuffle. PortalPlayer was the largest competitor, but were bought by Nvidia after PortalPlayer's chips lost their socket in the iPod. SigmaTel was voted "Best Place to Work in Austin 2005" by the ''Austin Chronicle''. In July 2005, SigmaTel acquired the rights to different software technologies sold by Digital Networks North America (a subsidiary of D&M Holdings, and owner of Rio Audio). SigmaTel sold its PC audio business in mid-2006 to Integrated Device Technology, Inc. (IDT) for approximately $80 million. SigmaTel also won a spot in Samsung televisions. Sales the SGTV5800 TV audio solution, which can be used in analog, digital and hybrid televisions, have been ramping up. SigmaTel later introduced SGTV5900, which is anticipated to supplant the SGTV5800. In mid-2007 SigmaTel introduced portable QVGA 320×240 portable video decoder, and support for higher resolutions using WMV and MPEG4 followed. Some SigmaTel microcontrollers, like STDC982G, are used in printers manufactured by Samsung and sold under the Xerox brand. Kodak all-in-one printers also use SigmaTel IC's. SigmaTel's equity traded as low as $100 million below book value. Its peak share price was $45 and its day one IPO max share price was around $18. After the SGTL IPO in 2003, Austin's other biggest IPO was the later spinoff of Freescale Semiconductor by Motorola Corporation. Over 150 models of MP3/WMA players used SigmaTel SDK3.1 and the STMP35xx SOC with its MS DRM10 capabilities. On February 4, 2008, Freescale Semiconductor announced that it had entered into a definitive agreement to acquire SigmaTel for $110 million.〔Freescale Enters Into Definitive Agreement to Acquire SigmaTel – Freescale Press Release 〕 The agreement closed in the second quarter of 2008 and all SGTL shares were purchased by Freescale for $3 each. Freescale continued developing and selling the STMP3 portable AV SoC product line, which are ARM9-based STMP37xx and STMP36xx AV SoCs, and the DSP56k-based STMP35xx portable AV SoC. Product info was on Freescale's ARM-based controller site. Freescale's i.MX2 ARM9 and i.MX3 ARM11-based multimedia SoC product line (especially analog SoC features) have been integrated with the STMP3xxx product line, resulting in a stronger portable multimedia product portfolio. On February 25, 2009, Freescale laid off 70% of the former SigmaTel team as part of a company-wide reduction in force. No new products under the Sigmatel design teams will be created. A 'skeleton crew' was chosen to stay and support existing OEM customers that are using the existing chips until the chips enter their 'End Of Life' phase. Freescale integrated analog IP from SigmaTel into its competing product lines and continues to pursue component and Real Time OS device driver-based support for OEM's rather than the complete hardware and software turnkey system design approach of the successful SigmaTel startup that powered hundreds of millions of portable media players enjoyed by many users. After winning MP3 player integrated circuit patent infringement suits at the U.S. International Trade Commission when the STMP35xx principal firmware engineer documented how SigmaTel firmware uses its dynamic voltage and frequency scaling related patents, U.S. customs physically destroyed Actions Semiconductor products at the U.S. border for intellectual property infringement. SigmaTel settled all patent litigation and in 2007 entered into a cross-licensing agreement with the Zhuhai, China-based Actions Semiconductor Co. Ltd. Both companies also agreed not to pursue possible third-party IP infringements or new legal action against each other and their respective customers for three years. Consequently, all of Actions' current and future products may be imported into the U.S. market without restrictions.〔Actions and SigmaTel Settle All Patent Litigation and Enter into Cross-License Agreement: Financial News – Yahoo! 20 June 2007〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SigmaTel」の詳細全文を読む スポンサード リンク
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