A "'holographic disk "'is a form of data storage designed for computers, created by InPhase Technologies.
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InPhase was forced to cut a number of its workforce; currently there is no release date for the drive and storage media visible.
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InPhase Technologies, after several announcements and subsequent delays in 2006 and 2007, announced that it would soon be introducing a flagship product.
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An independent analysis in 2009 suggested that InPhase could reach positive cash flow with the sale of roughly one hundred libraries each containing four drives and two thousand pieces of storage media.
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In February 2008, InPhase Technologies was granted a joint patent with video game company Nintendo for a flexure-based scanner for angle-based multiplexing in a holographic storage system.
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While InPhase is trying to save time and money by using as much existing technology as possible _ for example, by using lasers developed for DVD drives _ Curtis said that full product development would take a few years.
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"It's a very old idea indeed, " said Dr . Kevin Curtis, a former hologram researcher at Bell Laboratories who is now the chief technology officer at InPhase Technologies, which is developing commercial products based on the technology.
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In QAM, an inphase signal ( or I, with one example being a cosine waveform ) and a quadrature phase signal ( or Q, with an example being a sine wave ) are amplitude modulated with a finite number of amplitudes, and then summed.
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Much of the blame for InPhase's bankruptcy was placed on then CEO Nelson Diaz, who ignored the engineers warning that the product was not ready for market, as well as, allegedly, taking on full pay while all other employees worked for minimum wage.
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However, with leadership that was incapable of realizing that InPhase did not have a working disk drive that could be reliably manufactured with adequate yield ( which led the company to spend tens of millions on components for disk drives that had no chance to properly working, questioning the operating skills of the management team ) the company failed at least four times to release the reader on-schedule after previously setting release dates of late 2005, late 2006, and then February 2007.
