On analysis of the principle and application mode of des, a des module which fits for embedded security system such as IC card is realized by topdown design methods.
在详细分析DES的基本原理和应用模式的基础上，结合DES硬件实现的特点，采用正向设计的方法实现了适用于IC卡等有嵌入式安全需要的系统中的DES模块。
Analyzing the parameters of the depletion-mode HV-NLDMOS used in a LED driver IC, the structure of DM-NLDMOS and optimal design method of its parameters were proposed.
基于一款LED驱动芯片中耗尽型高压NLDMOS器件的参数要求，提出一种耗尽型高压NLDMOS的器件结构和参数设计优化方法。
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