Title :
Nonlinear time-domain macromodeling of OTA circuits
Author :
Pérez-Verdu, B. ; Cruz, J. ; Linares-Barranco, B. ; Rodriguez-Vázquez, A. ; Huertas, J.L. ; Sánchez-Sinencio, E.
Author_Institution :
Dept. of Electron. & Electromagn., Sevilla Univ., Spain
Abstract :
The authors present an accurate nonlinear macromodel of the operational transconductance amplifier (OTA) which is suitable for the transient simulation of OTA-based CMOS analog integrated circuits. As compared to device-level OTA models, the proposed macromodel is advantageous in terms of CPU time. Also, in circuits with many OTAs, it does not have the problems of convergence that the device-level model has. All the macromodel parameters can be calculated from measurements made at the OTA terminals. Experimental results from a 3-μm CMOS OTA prototype as well as simulation results from device-level models are included and compared to simulation results from the macromodel
Keywords :
CMOS integrated circuits; active networks; analogue circuits; circuit analysis computing; linear integrated circuits; nonlinear network analysis; operational amplifiers; time-domain analysis; transient response; 3 micron; CMOS analog integrated circuits; CPU time; OTA circuits; nonlinear macromodel; operational transconductance amplifier; time-domain macromodeling; transient simulation; CMOS analog integrated circuits; Central Processing Unit; Circuit simulation; Convergence; Integrated circuit measurements; Operational amplifiers; Semiconductor device modeling; Time domain analysis; Transconductance; Virtual prototyping;
Conference_Titel :
Circuits and Systems, 1989., IEEE International Symposium on
Conference_Location :
Portland, OR
DOI :
10.1109/ISCAS.1989.100628
