Title :
OTA-based non-linear function approximations
Author :
Sanchez-Sinencio, Edgar ; Ramírez-Angulo, Jaime ; Linares-Barranco, Bernabé ; Rodriguez-Vazquez, Angel
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
The suitability of operational transconductance amplifiers (OTAs) as the main active element to obtain basic building blocks for the design of programmable nonlinear continuous-time networks is examined. The main purpose is to show that the OTA, as the active element in basic building blocks, can be efficiently used for nonlinear continuous-time function synthesis. Two efficient nonlinear function synthesis approaches are presented. The first approach is a rational approximation, and the second is a piecewise-linear approach. Test circuits have been integrated using a 3-μm p-well CMOS process. The flexibility of the designed and tested circuits is confirmed
Keywords :
CMOS integrated circuits; active networks; operational amplifiers; 3 micron; CMOS; OTA; basic building blocks; nonlinear continuous-time function synthesis; nonlinear function synthesis approaches; operational transconductance amplifiers; piecewise-linear approach; programmable nonlinear continuous-time networks; rational approximation; CMOS process; CMOS technology; Circuit testing; Function approximation; Integrated circuit synthesis; Operational amplifiers; Piecewise linear techniques; Threshold voltage; Variable structure systems; Voltage control;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100300
