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| Modeling and Analysis of CMOS Differential Inductors and Series-Connected Inductors |
| Pan Jie①②③; Yang Hai-gang①; Yang Li-wu③ |
| ①Institute of Electronics , Chinese Academy of Sciences , Beijing 100190, China;②Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; ③RF Application Group, SMIC, Shanghai 201203, China |
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Abstract This paper models and analyses differential inductors and series-connected inductors from SMIC’s 0.18μm CMOS process, and then proposes a design rule of inductors in RF CMOS differential circuits. This paper also presents a new model of series-connected inductors, in which mutual inductance, substrate capacitive loss and capacitive effects between windings are taken into consideration. Finally, a group of series-connected inductors with different spacing are designed and fabricated, and their measured results verify this model.
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Received: 09 March 2008
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2009, Vol. 31 
