TY - GEN
T1 - Novel symmetric-structure switchable differential inductor design
AU - Tsai, Pei Kang
AU - Chen, Yu Ting
AU - Huang, Tzuen Hsi
PY - 2009/12/1
Y1 - 2009/12/1
N2 - A novel symmetric layout structure is proposed for a switchable differential inductor (SWD-inductor). The proposed structure overcomes the problem of quality factor degradation encountered when using SWD-inductors in the traditional quadrangular spiral layout. On the basis of the substrate loss density distribution predicted by an electromagnetic (EM) wave simulator, the reason for the quality factor improvement in our proposed novel SWD-inductor structure is interpreted. Two testkeys with the novel and the traditional layout structures are fabricated using 0.18-μm RF CMOS technology. Under identical criterion of area consumption and inductance values for the testkeys, the experimental data show that our proposed structure improves the quality factor by 41% at 1.8 GHz when the switch is turned off and by 24% at 7.5 GHz when the switch is turned on.
AB - A novel symmetric layout structure is proposed for a switchable differential inductor (SWD-inductor). The proposed structure overcomes the problem of quality factor degradation encountered when using SWD-inductors in the traditional quadrangular spiral layout. On the basis of the substrate loss density distribution predicted by an electromagnetic (EM) wave simulator, the reason for the quality factor improvement in our proposed novel SWD-inductor structure is interpreted. Two testkeys with the novel and the traditional layout structures are fabricated using 0.18-μm RF CMOS technology. Under identical criterion of area consumption and inductance values for the testkeys, the experimental data show that our proposed structure improves the quality factor by 41% at 1.8 GHz when the switch is turned off and by 24% at 7.5 GHz when the switch is turned on.
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U2 - 10.1109/APMC.2009.5385507
DO - 10.1109/APMC.2009.5385507
M3 - Conference contribution
AN - SCOPUS:77950656318
SN - 9781424428021
T3 - APMC 2009 - Asia Pacific Microwave Conference 2009
SP - 2140
EP - 2143
BT - APMC 2009 - Asia Pacific Microwave Conference 2009
T2 - Asia Pacific Microwave Conference 2009, APMC 2009
Y2 - 7 December 2009 through 10 December 2009
ER -