Active-feedback frequency compensation for low-power multi-stage amplifiers

Author

Lee, Hoi ; Mok, Philip K T

Author_Institution

Dept. of Electr. & Electron. Eng., Hong Kong Univ. of Sci. & Technol., Clear Water Bay, China

fYear

2002

fDate

2002

Firstpage

325

Lastpage

328

Abstract

This paper describes a novel active-feedback frequency compensation (AFFC) technique for low-power multi-stage amplifiers. With a high-speed active feedback block, the proposed compensation technique significantly improves both the frequency and the transient responses of the amplifier. Implemented by a standard 0.8μm CMOS process, a three-stage AFFC amplifier achieves 100dB gain, 4.5MHz gain-bandwidth product, 65° phase margin and 1.5V/μs slew rate with 0.4mW power consumption when driving a 100pF capacitive load.

Keywords

CMOS analogue integrated circuits; compensation; feedback amplifiers; frequency response; high-speed integrated circuits; low-power electronics; transient response; 0.4 mW; 0.8 micron; 100 dB; 100 pF; CMOS; active-feedback frequency compensation; capacitive load; frequency response; gain-bandwidth product; high-speed active feedback block; low-power multi-stage amplifiers; phase margin; power consumption; slew rate; three-stage AFFC amplifier; transient response; Bandwidth; CMOS technology; Capacitors; Feedback; Frequency; Network topology; Operational amplifiers; Power amplifiers; Transconductance; Transient response;

fLanguage

English

Publisher

ieee

Conference_Titel

Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002

Print_ISBN

0-7803-7250-6

Type

conf

DOI

10.1109/CICC.2002.1012831

Filename

1012831