TY - GEN
T1 - Integrated switchable inductors with symmetric differential layout
AU - Wang, Jia Lun
AU - Tzeng, Yan Ru
AU - Huang, Tzuen Hsi
PY - 2006/12/1
Y1 - 2006/12/1
N2 - An integrated switchable inductor with symmetric differential layout is proposed. It can be achieved over 50% area shrinkage as compared with the traditional ones. Three testkeys with a typical switch-ON inductance of about 2.1 nH (at 1.8 GHz) were pre-designed using an electromagnetic simulator and successfully verified by tsmc's 0.18 μm RF CMOS technology. The measured ON/OFF inductance values are of 2.1 nH / 2.7 nH, 2.1 nH / 2.4 nH and 2.0 nH / 2.2 nH; and the Q-factors are of 4.1 / 6.2, 4.6 / 6.1 and 5.1 / 6.1, respectively. The Q-factor degradation of proposed switchable inductors due to the different inner turn size effect is discussed and a simple inductor lumped-circuit model is proposed with a relatively reasonable accuracy up to 10 GHz. A VCO testkey with the integration of such switchable inductor is also demonstrated.
AB - An integrated switchable inductor with symmetric differential layout is proposed. It can be achieved over 50% area shrinkage as compared with the traditional ones. Three testkeys with a typical switch-ON inductance of about 2.1 nH (at 1.8 GHz) were pre-designed using an electromagnetic simulator and successfully verified by tsmc's 0.18 μm RF CMOS technology. The measured ON/OFF inductance values are of 2.1 nH / 2.7 nH, 2.1 nH / 2.4 nH and 2.0 nH / 2.2 nH; and the Q-factors are of 4.1 / 6.2, 4.6 / 6.1 and 5.1 / 6.1, respectively. The Q-factor degradation of proposed switchable inductors due to the different inner turn size effect is discussed and a simple inductor lumped-circuit model is proposed with a relatively reasonable accuracy up to 10 GHz. A VCO testkey with the integration of such switchable inductor is also demonstrated.
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U2 - 10.1109/APMC.2006.4429661
DO - 10.1109/APMC.2006.4429661
M3 - Conference contribution
AN - SCOPUS:44949205439
SN - 4902339099
SN - 9784902339093
T3 - Asia-Pacific Microwave Conference Proceedings, APMC
SP - 1369
EP - 1372
BT - 2006 Asia-Pacific Microwave Conference Proceedings, APMC
T2 - 2006 Asia-Pacific Microwave Conference, APMC
Y2 - 12 December 2006 through 15 December 2006
ER -