Title :
Total transconductance optimization for a rail to rail amplifier
Author :
Danchiv, Andrei ; Bodea, Mircea ; Dan, Claudius
Author_Institution :
Infineon Technol. Romania, Bucharest
Abstract :
This paper presents a 0.6 mum CMOS constant transconductance rail to rail amplifier implementation. A single stage, folded cascode topology is used and an equivalent Zener diode controls the input pair transconductance by redistributing the bias current between the two complementary differential pairs. An analytical model is developed for the input transconductance versus common mode voltage dependence. The output resistance and total voltage gain variation are also presented. The results are checked by SPICE simulation.
Keywords :
CMOS integrated circuits; Zener diodes; operational amplifiers; optimisation; CMOS constant rail to rail amplifier; SPICE simulation; common mode voltage; equivalent Zener diode; folded cascode topology; total transconductance optimization; Analytical models; CMOS technology; Diodes; IEEE members; Rail to rail amplifiers; Rail to rail inputs; Summing circuits; Threshold voltage; Topology; Transconductance;
Conference_Titel :
Optimization of Electrical and Electronic Equipment, 2008. OPTIM 2008. 11th International Conference on
Conference_Location :
Brasov
Print_ISBN :
978-1-4244-1544-1
Electronic_ISBN :
978-1-4244-1545-8
DOI :
10.1109/OPTIM.2008.4602493
