Abstract
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.
Original language | English |
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Title of host publication | Conference Proceedings: NEWCAS 2015: 13th IEEE International New Circuits and Systems Conference (NEWCAS), June 7-10 2015, Grenoble, France |
Publisher | IEEE |
Number of pages | 4 |
DOIs | |
Publication status | Published - 2015 |
Event | IEEE International New Circuits and Systems Conference - Duration: 7 Jun 2015 → … |
Conference
Conference | IEEE International New Circuits and Systems Conference |
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Period | 7/06/15 → … |
Keywords
- digital integrated circuits
- inverters
- operational amplifiers
- transconductance