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A differential 0.13/spl mu/m CMOS active inductor for high-frequency phase shifters

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3 Author(s)
M. Abdalla ; Dept. of Electr. & Comput. Eng., Toronto Univ., Tornto, Ont., Canada ; G. V. Eleftheriades ; Khoman Phang

This paper presents a novel differential 0.13mum CMOS active inductor circuit, which is employed in the design of an integrated negative refractive index metamaterial phase shifter. The active inductor circuit employs a digital/analog tunable feedback resistance to allow controlling both the inductance and the quality factor. The inductance is tunable from 2.5nH to 13.6nH at 5GHz while having a fixed peak quality factor of 100. This results in a phase shift of 36.7deg/stage, at 5GHz, with less than 0.67dB insertion loss

Published in:

2006 IEEE International Symposium on Circuits and Systems

Date of Conference:

21-24 May 2006