Experimental Characterization of On-Chip Single and Double-Coupling Spiral Inductors |
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Authors: | Kai Kang Tao-Soon Yeo Jinglin Shi and Bin Wu |
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Institution: | (1) Department of Electrical and Computer Engineering, National University of Singapore, Kent Ridge, Singagpore, 119260;(2) Institute of Microelectronics, 11, Science Park Road, Singapore Science Park-II, Singapore, 117685 |
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Abstract: | Experimental investigations on on-chip single and double-coupling square spiral inductors on silicon substrate are performed. For each pair of double-coupling inductors, they have the same edge distance, but with different turn numbers. Based on the measured S-parameters using de-embedding procedure, the inductance and Q-factor of the single square inductor are examined at first, and good agreement is obtained in the extracted inductance, compared to the predicted values using a closed-form series inductance equation. While for double-coupling spiral inductors, the smaller the product of two turn numbers, the weaker coupling will be, and in particular at low frequencies. |
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Keywords: | on-chip single spiral inductors coupling transfer losses inductance Q-factor |
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