CMOS floating active inductor and its applications to bandpass filter and oscillator designs

Author

Thanachayanont, A. ; Payne, A.

Author_Institution

Dept. of Electr. & Electron. Eng., Imperial Coll. of Sci., Technol. & Med., London, UK

Volume

147

Issue

1

fYear

2000

fDate

2/1/2000 12:00:00 AM

Firstpage

42

Lastpage

48

Abstract

A CMOS fully differential floating active inductor is realised by exploiting the intrinsic capacitance of the transistor. This technique allows the simulated inductor to operate closer to the f_T, of the technology. Simulation results using SpectreRF with AMS 0.8 μm CMOS process show a self resonant frequency over 1 GHz, and independent tuning of the inductance and the series resistance values. The floating active inductor has been employed in the design of a fourth-order 100 MHz IF bandpass filter and a second-order RF tunable oscillator to demonstrate its performance

Keywords

CMOS analogue integrated circuits; VHF filters; active filters; active networks; band-pass filters; circuit tuning; inductors; radiofrequency oscillators; variable-frequency oscillators; 0.8 micron; 1 GHz; 100 MHz; AMS CMOS process; CMOS floating active inductor; SpectreRF; bandpass filter designs; circuit tuning; fourth-order IF bandpass filter; fully differential active inductor; oscillator designs; second-order RF tunable oscillator; transistor capacitance;

fLanguage

English

Journal_Title

Circuits, Devices and Systems, IEE Proceedings -

Publisher

iet

ISSN

1350-2409

Type

jour

DOI

10.1049/ip-cds:20000053

Filename

836510