Adesto Technologies, a fabless semiconductor company that’s so secretive that there’s no content on its web site, has raised $14 million in equity and warrants, according to a regulatory filing. Based in Sunnyvale, Calif., the three-year-old company has a pretty healthy funding history. It raised $6 millon in 2007 and another $5.5 million in 2008 in seen money from Arch Venture Partners, Harris & Harris, Adams Street Partners and Applied Ventures. It’s unclear whether any of these firms participated in the most recent round.

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