Title :
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
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;
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
DOI :
10.1109/MWSCAS.2001.986148
