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EEsof ( ; electronic engineering software), today known as Keysight EEsof EDA,〔(Keysight EEsof EDA home page )〕 is a provider of electronic design automation (EDA) software that helps engineers design products such as cellular phones, wireless networks, radar, satellite communications systems, and high-speed digital wireline infrastructure. Applications include electronic system level (ESL), high-speed digital, RF-Mixed signal, device modeling, RF and Microwave design for commercial wireless, aerospace, and defense markets. ==History== EEsof was founded in 1983 by an entrepreneur, Charles J. ("Chuck") Abronson, and a former Compact Software employee, Bill Childs.〔(Charles J. Abronson bio at CAP Wireless )〕〔(History of EEsof at Microwaves 101 )〕〔(History of Compact at Microwaves 101 )〕 EEsof's first products included high frequency circuit simulators such as Touchstone and Libra. Although the Touchstone simulator itself is obsolete,〔It was replaced by E8881 ADS Linear Simulator, which was later incorporated into (W2200 ADS Core )〕 its eponymous file format lives on. EEsof was acquired by Hewlett-Packard in 1993〔("Hewlett-Packard to acquire EEsof", ''Mobile Phone News'', Sept 13, 1993 )〕 and later spun out first as part of Agilent Technologies in 1999 and then as part of Keysight Technologies thus becoming Keysight EEsof EDA.〔(Keysight EEsof EDA home page )〕 After the merger of HP and EEsof, the EEsof products were combined with the HP simulator, Microwave Design System (MDS). HP's own entry, MDS, had been introduced in 1985. It was developed in-house and comprised a linear circuit simulator with integrated schematic capture and graphical layout with back-annotation, a first for RF EDA software. MDS was offered on UNIX workstations from HP, Sun, and Apollo as well on the PC. Prior to the introduction of MDS, HP had a marketing relationship with EEsof and sold Touchstone software on HP platforms such as the Series 200 (but not on the PC). The marketing relationship ended after the introduction of HP's MDS product. The HP and EEsof harmonic balance simulators also had parallel lives before the merger. HP funded an employee Ken Kundert to do a PhD at UC Berkeley. For his thesis he developed Spectre, the first harmonic balance prototype. Some sources argue that since Berkeley had an open policy to all of its research work, EEsof was able to learn about the project and actually released a product, Libra, before HP was able to commercialise it in MDS. (Libra was a play on the Latin word libra for balance or scales). However, other sources say that Libra was developed completely independently.〔(【引用サイトリンク】 Agilent EEsof EDA – Part I )〕〔(【引用サイトリンク】 Agilent EEsof EDA – Part II )〕 In any case, Kundert left HP to join Cadence Design Systems shortly after receiving his PhD. There he developed Spectre and SpectreRF. On January 7, 2014 Agilent announced a plan to spin off its electronic measurement divisions, including EEsof, as a separate company, Keysight Technologies. 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「EEsof」の詳細全文を読む スポンサード リンク
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