Title :
Analytical figure of merit evaluation of RNMC networks for low-power three-stage OTAs
Author :
Marano, Davide ; Palumbo, Gaetano ; Pennisi, Salvatore
Author_Institution :
DIEES (Dipt. di Ing. Elettr., Elettron. e dei Sist.), Univ. di Catania, Catania, Italy
fDate :
May 30 2010-June 2 2010
Abstract :
In this paper the reversed nested Miller compensation (RNMC) approach is reviewed and its design equations are presented. After introducing two new compensation techniques, a coherent and comprehensive comparison of the available solutions is performed by means of a figure of merit expressing the trade-off among gain-bandwidth product, load capacitance and total transconductance, for equal values of phase margin. The proposed comparison outlines useful design guidelines for the optimization of the overall amplifier performance. Simulations proving the effectiveness of the suggested design methodology and analytical comparison are included, showing the substantial advantage of one of the proposed solutions.
Keywords :
low-power electronics; operational amplifiers; optimisation; RNMC networks; design equations; figure of merit; gain bandwidth product; load capacitance; low-power three-stage OTA; operational amplifier; phase margin; reversed nested Miller compensation technique; transconductance; Bandwidth; Current supplies; Design methodology; Equations; Network topology; Parasitic capacitance; Power amplifiers; Power supplies; Transconductance; Voltage;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537455
