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Frequency-independent equivalent-circuit model for on-chip spiral inductors

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8 Author(s)
Yu Cao ; Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA, USA ; Groves, R.A. ; Xuejue Huang ; Zamdmer, N.D.
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A wide-band physical and scalable 2-Π equivalent circuit model for on-chip spiral inductors is developed. Based on physical derivation and circuit theory, closed-form formulas are generated to calculate the RLC circuit elements directly from the inductor layout. The 2-Π model accurately captures R(f) and L(f) characteristics beyond the self-resonant frequency. Using frequency-independent RLC elements, this new model is fully compatible with both ac and transient analysis. Verification with measurement data from a SiGe process demonstrates accurate performance prediction and excellent scalability for a wide range of inductor configurations.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:38 ,  Issue: 3 )