Effect of CFOA nonidealities in Miller integrator cells

Author

Mita, R. ; Palumbo, G. ; Pennisi, S.

Author_Institution

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

Volume

51

Issue

5

fYear

2004

fDate

5/1/2004 12:00:00 AM

Firstpage

249

Lastpage

253

Abstract

The performance of the Miller integrator cells based on current feedback OpAmps (CFOAs) is evaluated. Inverting and noninverting structures are analyzed and compared to traditional implementations using voltage OpAmps (VOAs). Fundamental relations, useful for design purposes, are also carried out. CFOA-based implementations were found to exhibit lower dc gain and higher relative error in the unity-gain frequency, thereby, limiting the high-frequency potential. The higher CFOA bandwidth can be traded for higher quality factors. Experimental data, in excellent agreement with expected results, are included.

Keywords

active filters; feedback amplifiers; integrating circuits; operational amplifiers; CFOA bandwidth; CFOA nonidealities; Miller integrator cells; analog filters; current feedback OpAmps; current-mode; dc gain; high-frequency potential; inverting structures; noninverting structures; quality factor; unity-gain frequency; voltage OpAmps; Bandwidth; Circuits; Feedback; Filters; Frequency; Helium; Q factor; Transfer functions; Voltage; Wideband; Analog filters; current feedback opamp; current-mode.; integrator; quality factor;

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2004.824056

Filename

1299039