Design and implementation of an MRC-C TQE filter with on-chip automatic tuning

Author

Martínez, Herminio ; Vidal, Eva ; Alarcón, Eduard ; Poveda, Alberto

Author_Institution

Dept. of Electron. Eng., Polytech. Univ. of Catalonia, Barcelona, Spain

Volume

1

fYear

2001

fDate

2001

Firstpage

196

Abstract

This work describes the design and implementation of the tuning loops (both central frequency and quality factor control loops) for a bandpass continuous-time fully-balanced filter based on a modification of the Transimpedance Q-Enhancement (TQE) structure, intended for audio-band applications. The circuit has been designed and fabricated in a CMOS 0.8 μm technology, and MRC (MOS Resistive Circuit) cells have been used to implement electronically tunable active resistors. Both post-layout transistor-level simulation results and experimental results validate the functionality of the tuning system

Keywords

CMOS analogue integrated circuits; Q-factor; circuit simulation; circuit tuning; continuous time filters; integrated circuit design; 0.8 μm technology; 0.8 micron; CMOS; MOS resistive circuit; Q factor; audio-band applications; bandpass continuous-time filter; post-layout transistor level simulation; transimpedance Q-Enhancement structure; tuning loops; Band pass filters; CMOS technology; Centralized control; Circuit optimization; Circuit simulation; Frequency locked loops; Q factor; Resistors; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. MWSCAS 2001. Proceedings of the 44th IEEE 2001 Midwest Symposium on

Conference_Location

Dayton, OH

Print_ISBN

0-7803-7150-X

Type

conf

DOI

10.1109/MWSCAS.2001.986148

Filename

986148