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Equivalent circuit for broadband modelling of on-chip spiral inductors up to millimetre-wave frequencies

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3 Author(s)
Horng, T.S. ; Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan ; Jau, J.-K. ; Tsai, Y.-S.

A single-stage expandable equivalent circuit is proposed to model an on-chip spiral inductor up to several times its first self-resonant frequency. The equivalent circuit adopts a modified T-section network configuration to achieve an extremely large bandwidth. The modelled results for a series of round spiral inductors fabricated with different turn numbers on InGaAs substrate demonstrate good agreement with measured results over a measurement frequency range up to 50 GHz.

Published in:

Electronics Letters  (Volume:41 ,  Issue: 15 )