Measured Results on Symmetric Dual-Level Spiral Inductors for RF ICs

A completely symmetric dual-level spiral inductor structure is proposed. The symmetry, area efficiency, the size dependence of the coupling factor, and the quality factors of the dual-level inductors are evaluated and compared with that of the single-level. This work demonstrates that, with most RF applications, the dual-level inductors are the better choice than the single-level. key words: spiral inductors, symmetric, RF ICs, quality factor

[1]  Stephen P. Boyd,et al.  Simple accurate expressions for planar spiral inductances , 1999, IEEE J. Solid State Circuits.

[2]  Michiel Steyaert,et al.  A fully integrated spiral-LC CMOS VCO set with prescaler for GSM and DCS-1800 systems , 1997, Proceedings of CICC 97 - Custom Integrated Circuits Conference.

[3]  Hong You,et al.  Optimization of high Q integrated inductors for multi-level metal CMOS , 1995, Proceedings of International Electron Devices Meeting.

[4]  B. Razavi.  The Modeling, Characterization, and Design of Monolithic Inductors for Silicon RF IC's , 2003 .

[5]  J. Long,et al.  A Q-factor enhancement technique for MMIC inductors , 1998, 1998 IEEE MTT-S International Microwave Symposium Digest (Cat. No.98CH36192).

[6]  W. C. Finley,et al.  High Q inductors for wireless applications in a complementary silicon bipolar process , 1994, Proceedings of IEEE Bipolar/BiCMOS Circuits and Technology Meeting.

[7]  Thomas H. Lee,et al.  The Design of CMOS Radio-Frequency Integrated Circuits: RF CIRCUITS THROUGH THE AGES , 2003 .

[8]  J.N. Burghartz,et al.  Multilevel-spiral inductors using VLSI interconnect technology , 1996, IEEE Electron Device Letters.

[9]  Keith A. Jenkins,et al.  Integrated RF and microwave components in BiCMOS technology , 1996 .