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1·Tish Rabe is the author of six previous Cat in the Hat Learning Library titles.

作者提胥·拉贝曾经写过六本“戴帽子的猫教你学知识”系列图书。

2·Tish Paper studies a few method of generating PWM pulse, Also analyse and discuss the harmonic characteristic of these modulation techniques, and provide a prof to select these method.

对产生PWM波的几种方式的谐波特性做了比较和探讨，为合理地选取控制方式提供了依据。