ENHANCED DOUBLE-PI MODEL FOR ON-CHIP SPIRAL INDUCTORS

摘要

Spiral inductors are extensively used in modern RFCMOS integrated circuits. Many studies have been done to capture their high-frequency behaviour, since an accurate model is crucial for reliable integrated circuit implementation and design optimization. The single-PI and double-PI models are most popular, with the single-PI model offering advantages such as easy extraction of parameters, while the double-PI model is very accurate. Disadvantages, however, include a decrease in the effective series resistance (ESR), caused by substrate coupling at high frequency not accurately represented by the single-PI model, whereas in the double-PI, with its distributed nature, it is hard to extract its parameters.