一种低功耗低重码率的cmos编码器的设计与分析-design and analysis of a cmos encoder with low power consumption and low duplication code rate.docxVIP

I I 摘 要 摘 要 汽车与电子的结合加速了汽车操控的智能化，正显著改变着人们的生活，使 得汽车电子（automotive electronics）行业蕴藏着巨大商机。随着防盗系统在汽车 电子行业中广泛地被应用，对机动车实施远距离操作的编码芯片成为了汽车电子 设计中的热点。 本文首先对编码芯片的主要技术和发展方向进行了分类和比较。结合基本理 论、设计要求和控制模式，设计了一款编码芯片电路，从整体构架、内部电路架 构以及编码器外围应用电路等方面对编码芯片进行系统定义。该 编码器采用 CMOS 制造工艺，内码共有 20 个位元，有效编码数可达 1048576 组。同时更兼具 外部电路简单，低功耗等特点，是一种性能优越，性价比高的编码器。 其次，论文对该编码芯片中的子电路模块进行了设计和仿真，包括：数据输 入模块、振荡器模块、计数器模块、时钟控制模块、分频模块、地址与数据修正 模块和输出模块。每个模块的基本工作原理、主要参数指标和相应仿真结果都做 了详细阐述。 最后，论文根据各个参数指标给出整体电路联合仿真的波形，对整体电路的 功能和典型性能进行了总结。仿真结果表明论文设计的编码电路功能正常，可以 满足设计要求。同时，给出版图设计及相关结果。论文的结论部分给出了所有电 特性设计结果与设计要求对照表，进行了容差分析，指出了该电路存在的不足和 改进方向。 关键词：汽车电子，身份识别，编码芯片 II II ABSTRACT ABSTRACT The combination of automobile and electronics accelerates the intelligent level of mobile control and has changed our life a lot, which lead great business opportunities in this area. With the increasing popularity of guard system applied in automotive electronics industry, coding IC that necessary for automobile are becoming a new focus in power managing IC. Firstly, the operational principles and sort of coding ICs drivers are introduced. Based on the introduction and the power requirement for design, the whole chip circuit architecture is designed. The IC is based on CMOS manufacturing process and includes 20 units which form 1048576 different codes. It’s a high performance and low cost IC with the features of simple application circuit and low power dissipation. Secondly, primary sub-block circuits are designed and simulated. The theory of sub-block circuits which include data input, oscillator, counter, time-control, frequency divider, address and data correction and data output are analyzed and these sub-block circuits are simulated using HSPICE. Finally, the whole chip function simulation and typical performance characteristics simulation were presented. The simulation results indicate the whole chip circuit has exact functions and meets the demands of applications. In the conclusion of this dissertation, all simulation results were compared wit