A Novel Structure On-Chip Spiral Inductors with Gradually Changed Metal Line Width and Space

Author

Wang, Yong ; Shi, Yanling ; Ding, Yanfang ; Tang, Shenqun ; Luo, Tianxing ; Zhu, Jun ; Chen, Shoumian ; Zhao, Yuhang

Author_Institution

Dept. of Electr. Eng., East China Normal Univ., Shanghai

fYear

2006

fDate

20-23 Aug. 2006

Firstpage

540

Lastpage

544

Abstract

A novel inductor layout structure with gradually reduced metal line width and space from outside to inside, which will ameliorate the metal loss issue of RF spiral inductor, is presented. The optimized inductors have shown less eddy-current effect than the conventional designs whose metal line width and space are normally fixed. Based on these kinds of advanced inductors, series resistance R_s could be reduced and at the same time, the quality factor of the inductor (Q) would be increased. The obtained results have corroborated the validity of the proposed method in the experiment, Q factor of a 5.96-nH new designed inductor on high-resistance silicon at 2.40 GHz is 14.23, 1.6% higher than the conventional structure with the same layout size. These novel inductors can be integrated with radio frequency integrated circuit (RF IC´s) to gain better performance in RF front end of a wireless communication system

Keywords

Q-factor; inductors; integrated circuit design; radiofrequency integrated circuits; 2.4 GHz; RF IC; eddy-current effect; high-resistance silicon; metal line space; metal line width; on-chip RF spiral inductors; quality factor; radio frequency integrated circuit; series resistance; wireless communication system; Coils; Design optimization; Energy loss; Inductors; Performance loss; Q factor; Radio frequency; Radiofrequency integrated circuits; Space technology; Spirals;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Acquisition, 2006 IEEE International Conference on

Conference_Location

Weihai

Print_ISBN

1-4244-0528-9

Electronic_ISBN

1-4244-0529-7

Type

conf

DOI

10.1109/ICIA.2006.305770

Filename

4097714