Solutions for CMOS current amplifiers with high-drive output stages

Author

Palmisano, Giuseppe ; Palumbo, Gaetano ; Pennisi, Salvatore

Author_Institution

Dipt. Elettrico, Elettronico e Sistemistico, Catania Univ., Italy

Volume

47

Issue

10

fYear

2000

fDate

10/1/2000 12:00:00 AM

Firstpage

988

Lastpage

998

Abstract

Design guidelines for CMOS current amplifiers with a high-drive capability are discussed in detail, paying special attention to the implementation of output stages with improved linearity performance. As a design example, two different current amplifiers were realized in a 1.2-μm process and experimentally tested. Both circuits used a 5-V power supply and dissipated 5.5 and 4 mW, respectively. The open-loop gain was found to be 90 and 100 dB and the gain-bandwidth product was 8 and 10 MHz. The two amplifiers provide bipolar output currents as high as 15 and 7 mA, with a maximum total harmonic distortion of around -54 dB, using a quiescent current in the output branches of only 200 μA

Keywords

CMOS analogue integrated circuits; current-mode circuits; harmonic distortion; integrated circuit design; operational amplifiers; 1.2 micron; 100 dB; 15 mA; 200 muA; 4 mW; 5 V; 5.5 mW; 7 mA; 90 dB; CMOS current amplifiers; bipolar output currents; gain-bandwidth product; high-drive output stages; linearity performance; open-loop gain; quiescent current; total harmonic distortion; Associate members; Circuit testing; Differential amplifiers; Equivalent circuits; Guidelines; High power amplifiers; Linearity; Operational amplifiers; Power supplies; Voltage;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.877141

Filename

877141