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Valid Logic Systems was one of the first commercial EDA Electronic design automation companies. It was founded in the early 1980s, along with Daisy Systems Corporation and Mentor Graphics, collectively known as DMV. Initially, Valid built both hardware and software, for schematic capture, logic simulation, static timing analysis, and packaging. Later they expanded into IC and PCB layout. At first, Valid ran schematic capture on a proprietary UNIX workstation, with static timing analysis, simulation, and packaging, running on a VAX or IBM-compatible mainframe. Within a few years, the (still proprietary) workstations were powerful enough to run all the software. By the mid-1980s, general purpose workstations were powerful enough, plus they were much cheaper and could be used for other applications. Companies such as Mentor Graphics and Cadence Design Systems took this path, and sold software only to run on standard workstations. The president of Valid, Jared Anderson, however felt that Wall Street would never adequately value a company that did not produce hardware, and insisted the companies products continue to be bundled. Eventually he was over-ruled by the board, but considerable time was lost to competitors. By 1990, however, almost all Valid software was run on workstations, primarily those from Sun Microsystems. Valid acquired several companies such as Telesis (PCB layout), Analog Design Tools, and Calma (IC layout). In turn, Valid was acquired by Cadence Design Systems in 1991.
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