Active RF bandpass filter with wide frequency tuning range

Author

Andriesei, Cristian ; Goras, Liviu ; Delacressonière, Bruno

Author_Institution

Gheorghe Asachi Tech. Univ., Iasi

Volume

2

fYear

2008

fDate

13-15 Oct. 2008

Firstpage

397

Lastpage

400

Abstract

The paper presents an improved tuning method implemented for a differential active inductor based RF bandpass filter. Derived from a previous designed transistor-only second order filter topology, independent frequency and quality factor tuning are demonstrated in 0.18 mum CMOS technology. The circuit has been basically designed for 2.4 GHz, a frequency high enough to cover the main wireless standards, has small power consumption and can exhibit very high Q values. A wide frequency tuning range is obtained by using on.chip varactors. The circuit absorbs 1 mW from a 1.8 V supply at 2.4 GHz central frequency.

Keywords

CMOS integrated circuits; UHF filters; UHF integrated circuits; active filters; band-pass filters; inductors; integrated circuit design; radiofrequency filters; CMOS; active RF bandpass filter; differential active inductor; frequency 2.4 GHz; power 1 mW; size 0.18 mum; transistor-only second order filter topology; voltage 1.8 V; wide frequency tuning range; Active inductors; Band pass filters; CMOS technology; Circuit optimization; Circuit topology; Energy consumption; Q factor; Radio frequency; Tuning; VHF circuits; CMOS RF bandpass filters; Q-enhancement; active inductors; independent frequency and quality factor tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Semiconductor Conference, 2008. CAS 2008. International

Conference_Location

Sinaia

ISSN

1545-827X

Print_ISBN

978-1-4244-2004-9

Type

conf

DOI

10.1109/SMICND.2008.4703436

Filename

4703436