Micropower Class-AB VGA With Gain-Independent Bandwidth

Author

Garcia-Alberdi, Coro ; Aguado-Ruiz, Jesus ; Lopez-Martin, Antonio J. ; Ramirez-Angulo, Jaime

Author_Institution

Dept. of Electr. & Electron. Eng., Public Univ. of Navarra, Pamplona, Spain

Volume

60

Issue

7

fYear

2013

fDate

Jul-13

Firstpage

397

Lastpage

401

Abstract

A novel class-AB variable gain amplifier with constant bandwidth and continuous gain tuning is presented. It is based on the cascade connection of a tunable transconductor and a transresistance amplifier. Class-AB operation is achieved using quasi-floating gate transistors. The circuit has been fabricated in a 0.5- μm CMOS technology, showing a third-order input intercept point (IIP3) of 13 dBV p for a power consumption of 500 μW.

Keywords

CMOS analogue integrated circuits; amplifiers; circuit tuning; electric resistance; power consumption; CMOS technology; IIP3; cascade connection; circuit fabrication; class-AB operation; class-AB variable gain amplifier; constant bandwidth; continuous gain tuning; gain-independent bandwidth; micropower class-AB VGA; power 500 muW; power consumption; quasifloating gate transistor; size 0.5 mum; third-order input intercept point; transresistance amplifier; tunable transconductor; Amplifier; class AB; programmable gain amplifier; transconductor; variable gain amplifier (VGA);

fLanguage

English

Journal_Title

Circuits and Systems II: Express Briefs, IEEE Transactions on

Publisher

ieee

ISSN

1549-7747

Type

jour

DOI

10.1109/TCSII.2013.2258267

Filename

6508833