Please use this identifier to cite or link to this item:
https://doi.org/10.1109/TMTT.2006.888934
Title: | Frequency-thermal characterization of on-chip transformers with patterned ground shields | Authors: | Shi, J. Yin, W.-Y. Kang, K. Mao, J.-F. Li, L.-W. |
Keywords: | Interleaved and center-tapped transformers Maximum available gain Minimum noise figure Pattern ground shields (PGSs) Power loss Quality (Q) factor Temperature |
Issue Date: | Jan-2007 | Citation: | Shi, J., Yin, W.-Y., Kang, K., Mao, J.-F., Li, L.-W. (2007-01). Frequency-thermal characterization of on-chip transformers with patterned ground shields. IEEE Transactions on Microwave Theory and Techniques 55 (1) : 1-11. ScholarBank@NUS Repository. https://doi.org/10.1109/TMTT.2006.888934 | Abstract: | Extensive studies on the performance of on-chip CMOS transformers with and without patterned ground shields (PGSs) at different temperatures are carried out in this paper. These transformers are fabricated using 0.18-μm RF CMOS processes and are designed to have either interleaved or center-tapped interleaved geometries, respectively, but with the same inner dimensions, metal track widths, track spacings, and silicon substrate. Based on the two-port S-parameters measured at different temperatures, all performance parameters of these transformers, such as frequency- and temperature-dependent maximum available gain (Gmax), minimum noise figure (NFmin), quality factor (Q1) of the primary or secondary coil, and power loss (Ploss) are characterized and compared. It is found that: 1) the values of the Gmax and Q1 factor usually decrease with the temperature; however, there may be reverse temperature effects on both G max and Q1 factor beyond certain frequency; 2) with the same geometric parameters, interleaved transformers exhibit better low-frequency performance than center-tapped interleaved transformers, whereas the center-tapped configurations possess lower values of NFmin at higher frequencies; and 3) with temperature rising, the degradation in performance of the interleaved transformers can be effectively compensated by the implementation of a PGS, while for center-tapped geometry, the shielding effectiveness of PGS on the performance improvement is ineffective. © 2006 IEEE. | Source Title: | IEEE Transactions on Microwave Theory and Techniques | URI: | http://scholarbank.nus.edu.sg/handle/10635/82384 | ISSN: | 00189480 | DOI: | 10.1109/TMTT.2006.888934 |
Appears in Collections: | Staff Publications |
Show full item record
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.