Title :
Active RF bandpass filter with wide frequency tuning range
Author :
Andriesei, Cristian ; Goras, Liviu ; Delacressonière, Bruno
Author_Institution :
Gheorghe Asachi Tech. Univ., Iasi
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;
Conference_Titel :
Semiconductor Conference, 2008. CAS 2008. International
Conference_Location :
Sinaia
Print_ISBN :
978-1-4244-2004-9
DOI :
10.1109/SMICND.2008.4703436
