硅基集成电路螺旋电感优化设计方法

Optimizing Approach of Spiral Inductors for Si-Based ICs

针对于硅基集成电路中螺旋电感的建模、分析和设计提出了一种新的优化设计方法.在分析了已有的对称型电感和锥型电感结构之后,针对电感在高频时的物理特性和电感的具体结构,结合两种结构的优点,提出了更加合理的锥型对称电感,使得螺旋电感的电感值、品质因数、差分特性和自激振荡频率都有了显著的提高.本优化方法尤其适合高性能全差分电路设计过程中对高性能电感的要求.本优化设计选取典型的单层正方形螺旋电感作为测试对象,工作频率2.439 GHz,芯片面积最大值限定为250μm×250μm.

This thesis mainly brings forward the particular optimizing approach that aims at the modeling, analysis and design of the integrated spiral inductors. After analyzing the present inductor structures and combining the merits of the two structures, it proposes a high performance optimization plan that aims at the physical characteristic in high frequency and idiographic structure of inductors. The plan makes the inductance, the quality factor, the difference characteristic and the self-oscillation frequency of the spiral inductor remarkable enhancement. The optimized design especially suits the requirements of high performance spiral inductor for high performance differential circuit design. This optimized design selects the representative monolayer square spiral inductor as the test object, the oper- ating frequency is 2.439 GHz, and the chip area maximum value definition is 250μm×250 μm.