Improved Reversed Nested Miller Frequency Compensation Technique With Voltage Buffer and Resistor

Author

Grasso, Alfio Dario ; Marano, Davide ; Palumbo, Gaetano ; Pennisi, Salvatore

Author_Institution

Dipt. di Ingegneria Elettrica, Elettronica e dei Sistemi Elettrotecnica, Catania Univ.

Volume

54

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

382

Lastpage

386

Abstract

This brief introduces and develops a novel frequency compensation technique for three-stage operational transconductance amplifiers. The new compensation topology exploits a voltage buffer and a nulling resistor to achieve a double pole-zero cancellation, occurring beyond the gain-bandwidth product. To verify the effectiveness of the compensation scheme, an amplifier has been fabricated in a standard 0.5-mum CMOS process. Experimental measurements are found to be in good agreement with the theoretical analysis and show an improvement in small-signal and large-signal performances

Keywords

CMOS integrated circuits; operational amplifiers; 0.5 micron; CMOS process; OTA; RNM; compensation scheme; compensation topology; double pole zero cancellation; frequency compensation; gain bandwidth product; nulling resistor; operational transconductance amplifiers; reversed nested Miller; voltage buffer; Bandwidth; Capacitors; Frequency; Operational amplifiers; Performance analysis; Resistors; Thin film transistors; Topology; Transconductance; Voltage; Frequency compensation; operational transconductance amplifier (OTA); reversed nested Miller (RNM);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2007.892217

Filename

4182499