By means of the commonly-used domestic variable duration impulse integrated controller, alternative design was carried out on PWM control chip of switching power on overseas equipments.

介绍了利用国内常用的脉宽调制型集成控制器对国外装置上开关电源的PWM控制芯片的替换设计。

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Based on the given switching functions, the variable structure controllers are designed.

基于所给切换函数，设计了变结构控制器。

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Upgrading my Trinity-powered HTPC is also high on my to-do list, and will give me a chance to do some benchmark comparisons, since switching the OS will be the only variable on that machine.

ENGADGET: Windows 8 upgrade diary: a defiantly successful installation