1、 I 摘摘 要要 20 世纪是 IC 迅速发展的时代。计算机等信息产业的飞速发展推动了集成电路 (Integrated CircuitIC)产业。大多数超大规模集成电路(Very Large Scale ICVLSI) 在日常生活中有着广泛的应用。在这些广泛应用的运算中,加法器是组成这些运算的基 本单元。在高性能微处理器和 DSP 处理器中,加法器的运算时间至关重要。加法器运 算常常处于高性能处理器运算部件的关键路径中,特别是在算术逻辑单元中加法器的运 算时间对处理器的速度起着决定性的作用。随着微处理器的运算速度越来越快,对快速 加法器的需求也越来越高。 本文首先介绍了几种基本的加法器类型以及
2、其工作原理,并重点分析了超前进位加 法器的组成结构、结构参数以及其工作原理。同时还介绍了制约超前进位加法器速度的 结构参数因素。然后设计研究了 2 位超前进位加法器,并重点分析了它的工作原理、系 统结构,并通过 tanner 软件进行仿真实验,从而验证了电路的准确信。最后介绍了基于 2mCMOS 工艺 MOSIS 版图设计的规则,通过电路图绘制出它的版图,并对它的版图 与电路图进行了一致性检测,进一步验证了设计的正确性。 关键词:关键词: CMOS 加法器;高速;超前进位;低功耗 II Abstract The 20th century is the era of rapid developm
3、ent of the IC . the blooming development of Computer Science has led to the growth of integrated circuit (IC) devices. Most of the Very Large Scale IC (VLSI) applications. In addition, among these widely used operations, the 1-bit full adder is the building block of these operation modules. In high-
4、performance microprocessors and DSP processor, the adder computing time is of the essence. Basically, the Adder computing were often the critical path in high-performance processors computing components, especially ALU adder plays a decisive role of the speed for computing time in the processor. Along with the speed booming of microprocessors, the high demand of high-speed adder comes to the Technical and market staff table. Firstly, several basic types of adders is introduced in this assign