High-performance CMOS current feedback operational amplifier

Author

Pennisi, Salvatore

Author_Institution

Dipt. Elettrico Elettronico e dei Sistemi, Catania Univ., Italy

fYear

2005

fDate

23-26 May 2005

Firstpage

1573

Abstract

The higher speed exhibited by the current-feedback opamp, compared to conventional architectures, is mainly due to the superior slew-rate, whereas the constant closed-loop bandwidth relies on a low input resistance value. This last requirement was revealed as the principal obstacle to the development of efficient CMOS implementations. A high-performance and robust CMOS current-feedback operational amplifier is proposed in this paper. It is obtained through a feedback configuration, which provides low input resistance and, working in class AB, allows high slew-rate capability. A design using a 0.35-μm process is given and SPICE simulations confirming the overall good performance are also provided.

Keywords

CMOS analogue integrated circuits; circuit feedback; operational amplifiers; 0.35 micron; 5.36 mW; 74 dB; CMOS operational amplifier; class AB operation; constant closed-loop bandwidth; current feedback operational amplifier; high slew-rate capability; low input resistance; Bandwidth; Differential amplifiers; Feedback; Manufacturing; Operational amplifiers; Robustness; SPICE; Transistors; Variable structure systems; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on

Print_ISBN

0-7803-8834-8

Type

conf

DOI

10.1109/ISCAS.2005.1464902

Filename

1464902