A high frequency tunable differential active inductor and its application to power dividers

Author

Li, Chaojiang ; Wang, Pingshan

Author_Institution

Dept. of Electr. & Comput. Eng., Clemson Univ., Clemson, SC

fYear

2008

fDate

10-13 Aug. 2008

Firstpage

285

Lastpage

288

Abstract

A CMOS high-Q differential active inductor is proposed in this paper. Simulation results show that the inductance is tunable from ~ 1 nH to 100 nH with operating frequency tunable from 300 MHz to 10 GHz. The inductor occupies 40 times 70 mu² in IBM CMOS8RF 0.13 mum process. It is used to design a 9.5 GHz Wilkinson power divider. The post layout simulation using Spectre shows that, with all ports matched to 50 Omega, the return loss and the output ports isolation are better than 20 dB with an insertion loss of ~ 3 dB. The active area of the miniaturized Wilkinson power divider is 160times170 mum², which is suitable for system integration.

Keywords

CMOS integrated circuits; MMIC; inductors; power dividers; CMOS technology; MMIC; Spectre simulation; Wilkinson power divider; differential active inductor; frequency 300 MHz to 10 GHz; resistance 50 ohm; size 0.13 mum; Active inductors; Circuit topology; Differential amplifiers; Frequency conversion; Inductance; Power dividers; Q factor; Radiofrequency integrated circuits; Transconductance; Tunable circuits and devices; Differential Active inductors; Wilkinson power dividers; gyrator-C; insertion loss;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. MWSCAS 2008. 51st Midwest Symposium on

Conference_Location

Knoxville, TN

ISSN

1548-3746

Print_ISBN

978-1-4244-2166-4

Electronic_ISBN

1548-3746

Type

conf

DOI

10.1109/MWSCAS.2008.4616792

Filename

4616792