High linear integrated LC filter for a continuous-time bandpass sigma-delta ADC

Author

Benabid, Sorore ; Bénabes, Philippe

Author_Institution

Dept. of Meas., Ecole Superieure d´´Electricite, Gifsur Yvette

Volume

1

fYear

2003

fDate

30-30 Dec. 2003

Firstpage

291

Abstract

The loop filter is one of the most difficult parts to implement in bandpass continuous-time sigma-delta modulators. LC filters have been presented as a filtering alternative for modern integrated radio transceivers. It allows the implementation of on-chip, high Q filters with high resonance frequencies. This paper describes the implementation of a parallel sixth-order bandpass sigma-delta modulator in 0.35mum CMOS technology. The continuous-time loop filter is based on an integrated LC tank and an improved linear transconductance amplifier. Simulation results show that good noise shaping performances is reached

Keywords

CMOS integrated circuits; Q-factor; band-pass filters; continuous time filters; sigma-delta modulation; 0.35 micron; CMOS technology; LC resonators; MOS transconductors; bandpass continuous-time sigma-delta modulators; continuous-time bandpass sigma-delta ADC; high Q filters; high linear integrated LC filter; integrated LC tank; linear transconductance amplifier; loop filter; parallel sixth-order bandpass sigma-delta modulator; resonance frequencies; Band pass filters; CMOS technology; Delta-sigma modulation; Filtering; Nonlinear filters; Radio transceivers; Radiofrequency amplifiers; Resonance; Resonant frequency; Transconductance; LC resonators; MOS transconductors; continuous-time filters; sigma-delta modulator;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003 IEEE 46th Midwest Symposium on

Conference_Location

Cairo

ISSN

1548-3746

Print_ISBN

0-7803-8294-3

Type

conf

DOI

10.1109/MWSCAS.2003.1562276

Filename

1562276