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

fYear

2010

fDate

May 30 2010-June 2 2010

Firstpage

777

Lastpage

780

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.2010.5537455

Filename

5537455