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Accurate measurement and parameter extraction for spiral inductors are very important in monolithic microwave integrated circuit (MMIC) design. In this paper, we have proposed an easy and simple model parameter extraction method of wide-band on-chip inductor. The simple extraction methodology is applied to extract parameters from the measured S-parameters of spiral inductors fabricated with 0.18-μm CMOS technology. Model prediction shows excellent agreement with the measured data over a wide frequency region. Also, the model can be easily integrated in SPICE-compatible simulators because all the elements are frequency independent. This method will provide practical and useful circuit parameters for MMIC design.