毕业设计（论文）-DCDC变极性电压转换器设计.docVIP

摘 要ICL7660/7662是美国哈里斯公司生产的变极性DC/DC变换器，它是数字电路与模拟电路结合的电路。通过电压换器可以将正电压输入变为负电压输出，即VI和VO的极性相反。其中，变换器利用振荡器和电路模拟开关实现电压极性的转换，因而静态电流小、转换效率高、外围电路简单。 本文首先介绍了集成电路的发展情况和ICL7660/7662芯片的原理与应用，针对RC振荡器、电平转换器、分频器、电压转换器进行了简要的电路原理分析。然后，从已有的版图照片入手，根据版图和芯片的特点，对版图进行了模块划分，从各个版图模块中提取电路图，并对电路进行功能分析；同时，提取电路的设计规则，对版图相应管子的尺寸进行测量，利用cadence软件中的spectre模块进行功能仿真分析，将仿真结果与理论分析结果进行比较，验证提取电路图的正确性；再依据0.6um设计规则，对原有版图进行了改进设计，原版图是铝栅工艺，而在设计中改为硅栅工艺，同时将原来的P阱工艺改为N阱工艺，分别画出各模块的版图，对设计的版图进行了设计规则检查（DRC）和版图与电路原理图对照（LVS）验证，得到完整的版图。 通过对ICL7660/7662芯片版图的提取与仿真分析，该电路可以实现电压极性的转换。经过工艺的改进，减少了工艺制作中的横向扩散，使栅源漏交叠电容最小，使电路转换效率提高，提高了电路的性能。 关键词：； Abstract ICL7660/7662 chip is the variable polarity DC/DC converters from U.S Harris company, which is composed of digital and analog circuits. The positive input voltage can be converted into the negative voltage output with the DC/DC converter. Namely, VO and VI are opposite voltages. The conversion was achieved with the oscillator circuit voltage and circuit analog switchs. Therefore, the chip has small static current, high conversion efficiency, simple external circuit. The development of IC is firstly introduced. The application and principle of ICL7660/7662 chip are discussed in the thesis. The RC oscillator circuit, the power-converters, the crossover and the voltage converter are also analyzed. Then, according to the characteristics of the layout, the circuit schematics are extracted with various modules. At the same time, the design rules are extracted, and the sizes of the MOS transistors are measured. Simulation analysis of circuit function is carried out with the spectre module of cadence software. Simulation results are compared with theoretical analysis, the accuracy of the extraction circuit is verified. The original layout is improved based on 0.6 um design rules. The original process is Al-gate technology, Si-gate technology is adopted in the newly layout. N-well technology replaces the original P-well technology. The layouts of every module are drawn. After design rule