Title :
A digital to transconductance converter for nauta structure op-amps in 65nm CMOS
Author :
Nicholson, Andrew ; Jenkins, J. ; van Schaik, Andre ; Hamilton, Tara J. ; Lehmann, T.
Author_Institution :
Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia
Abstract :
A digital-to-transcoductance converter is presented for use with digitally programmable Nauta structure operational amplifiers. The converter architecture consists of parallel connected tri-state CMOS inverters sized in such a way as to present a complete range of transconductance tunability at the expense of linearity and transconductance output range. Our converter architecture is analysed under mismatch conditions and shows that our converter meets these design constraints which are required for the programmability of high gain states within digital Nauta op-amps.
Keywords :
CMOS analogue integrated circuits; CMOS logic circuits; digital-analogue conversion; logic gates; operational amplifiers; digital to transconductance converter; digitally programmable Nauta structure operational amplifiers; high gain state programmability; nauta structure op-amps; parallel connected tri-state CMOS inverters; transconductance output range; CMOS integrated circuits; Equations; Gain; Inverters; Standards; Transconductance; Transistors; 65nm CMOS; Digital-to-Transconductance Converter; Nauta structure;
Conference_Titel :
Circuits and Systems (MWSCAS), 2014 IEEE 57th International Midwest Symposium on
Conference_Location :
College Station, TX
Print_ISBN :
978-1-4799-4134-6
DOI :
10.1109/MWSCAS.2014.6908380
