Tunable ultralow voltage transconductance amplifier and GmC filter

This paper presents a fully differential dual-ended ultralow-voltage (ULV) FGUVMOS operational transconductance amplifier (FGUVMOS-OTA), and a Gm-C filter where the FGUVMOS-OTA is used. The OTA has no internal nodes, rail-to-rail operation and dynamic load. The cut-off frequency of the Gm-C filter is tunable over more than 5 decades. The circuits may be operated with supply voltages down to 200 mV.

[1]  Bram Nauta,et al.  A CMOS transconductance-C filter technique for very high frequencies , 1992 .

[2]  Yngvar Berg,et al.  Programmable floating-gate MOS logic for low-power operation , 1997, Proceedings of 1997 IEEE International Symposium on Circuits and Systems. Circuits and Systems in the Information Age ISCAS '97.

[3]  Michiel Steyaert,et al.  High-performance CMOS continuous-time filters , 1993, The Kluwer international series in engineering and computer science.

[4]  Gerson A. S. Machado.  Low-power HF microelectronics: a unified approach , 1996 .

[5]  Yngvar Berg,et al.  Area efficient circuit tuning with floating-gate techniques , 1999, ISCAS'99. Proceedings of the 1999 IEEE International Symposium on Circuits and Systems VLSI (Cat. No.99CH36349).

[6]  E. Vittoz,et al.  An analytical MOS transistor model valid in all regions of operation and dedicated to low-voltage and low-current applications , 1995 .

[7]  Douglas A. Kerns,et al.  UV-activated conductances allow for multiple time scale learning , 1993, IEEE Trans. Neural Networks.