Please use this identifier to cite or link to this item:
|Title:||Frequency-thermal characterization of on-chip transformers with patterned ground shields||Authors:||Shi, J.
|Keywords:||Interleaved and center-tapped transformers
Maximum available gain
Minimum noise figure
Pattern ground shields (PGSs)
Quality (Q) factor
|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.
checked on Jun 21, 2021
WEB OF SCIENCETM
checked on Jun 14, 2021
checked on Jun 21, 2021
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.