Title :
Wide tunable CMOS active inductor
Author :
Reja, M.M. ; Filanovsky, I.M. ; Moez, Kambiz
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB
Abstract :
A tunable CMOS active inductor is presented. The circuit uses a cross-coupled pair of transistors providing positive feedback for enhanced quality factor. The circuit is biased with a controllable current source varying the feedback and tuning the inductor. The proposed inductor is designed and simulated in a 90 nm digital CMOS process. It shows a wide-frequency range inductive impedance and a very high resonance frequency. By cascading two inductors, a wideband filter/amplifier is designed to characterise the inductor performance.
Keywords :
CMOS digital integrated circuits; Q-factor; circuit feedback; inductors; integrated circuit design; microwave integrated circuits; controllable current source; digital CMOS process; positive feedback; quality factor; resonance frequency; size 90 nm; transistors; wide tunable CMOS active inductor; wideband filter-amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20081375
