TY - GEN
T1 - Subthreshold operation of Nauta's operational transconductance amplifier
AU - Irfansyah, Astria Nur
AU - Nicholson, Andrew
AU - Jenkins, Julian
AU - Hamilton, Tara Julia
AU - Lehmann, Torsten
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/8/6
Y1 - 2015/8/6
N2 - This paper investigates the subthreshold operation of the inverter-based operational transconductance amplifier for the potential use in very low power data conversion systems. Circuit analysis and sizing strategies are presented, and a first order continuous-time delta-sigma modulator circuit is used as a case study to verify the performance of the amplifier when operating in subthreshold region. We demonstrate experimental results using a digitally configurable Nauta operational transconductance amplifier implemented in a 180nm CMOS process which shows up to 97.76 percent power reduction when 600mV is used instead of 1.8V as supply with better figure of merit and without significant signal-to-noise distortion ratio penalty highlighting its significant potential at subthreshold operation.
AB - This paper investigates the subthreshold operation of the inverter-based operational transconductance amplifier for the potential use in very low power data conversion systems. Circuit analysis and sizing strategies are presented, and a first order continuous-time delta-sigma modulator circuit is used as a case study to verify the performance of the amplifier when operating in subthreshold region. We demonstrate experimental results using a digitally configurable Nauta operational transconductance amplifier implemented in a 180nm CMOS process which shows up to 97.76 percent power reduction when 600mV is used instead of 1.8V as supply with better figure of merit and without significant signal-to-noise distortion ratio penalty highlighting its significant potential at subthreshold operation.
UR - http://www.scopus.com/inward/record.url?scp=84945144251&partnerID=8YFLogxK
U2 - 10.1109/NEWCAS.2015.7182065
DO - 10.1109/NEWCAS.2015.7182065
M3 - Conference contribution
AN - SCOPUS:84945144251
T3 - Conference Proceedings - 13th IEEE International NEW Circuits and Systems Conference, NEWCAS 2015
BT - Conference Proceedings - 13th IEEE International NEW Circuits and Systems Conference, NEWCAS 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 13th IEEE International NEW Circuits and Systems Conference, NEWCAS 2015
Y2 - 7 June 2015 through 10 June 2015
ER -