A 250MHz Gm-C filter using negative current feedback OTAs

Tien Yu Lo*, Chih Lung Kuo, Chung-Chih Hung, Chi Hsiang Lo

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A CMOS fourth-order linear phase low-pass filter used for high speed wireless/wireline system is realized in 0.18-m CMOS process. The high speed filter is designed based on operational transconductance amplifier (OTA) biquad sections. As well known, large transconductance is required for high speed applications, and thu. The conventional source degeneration topology, which operates wit. The trade-off of linearity and transconductance, is not suitable. In this paper. The proposed OTA us. The negative current feedback topology to maintain linearity for high speed application. By usin. The proposed OTA as a building block, a 4-th order low-pass filter is realized. Fabricating in 0.18-m CMOS technology. The -3dB filter frequency response at 250MHz is measured. The measured HD3 performance is about -40dB an. The group delay variation is less than 5ns at the filter -3dB cutoff frequency.

Original languageEnglish
Title of host publication2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009
Pages367-370
Number of pages4
DOIs
StatePublished - 1 Dec 2009
Event2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009 - Yasmine Hammamet, Tunisia
Duration: 13 Dec 200916 Dec 2009

Publication series

Name2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009

Conference

Conference2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009
CountryTunisia
CityYasmine Hammamet
Period13/12/0916/12/09

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    Lo, T. Y., Kuo, C. L., Hung, C-C., & Lo, C. H. (2009). A 250MHz Gm-C filter using negative current feedback OTAs. In 2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009 (pp. 367-370). [5410914] (2009 16th IEEE International Conference on Electronics, Circuits and Systems, ICECS 2009). https://doi.org/10.1109/ICECS.2009.5410914