关于功率放大器的电子书籍，手把手教你使用功放，很好的教程-On the power amplifier of electronic books, hands to teach you to use the amplifier, a good tutorial

verilog教程，更加偏向工程化的verilog实用教程，有很多实际模块，推荐(Verilog tutorial, more biased toward the engineering of the Verilog practical tutorial, there are many practical modules, recommended)

MicroChip的FOC教程，通俗易懂(MicroChip's FOC algorithm tutorial, is easy to understand)