An RF variable gain amplifier with linear-in-dB gain steps and automatic power consumption optimization

Author

Das, Abhijit Kumar ; Frechette, Michel

Author_Institution

Texas Instrum., Dallas, TX, USA

fYear

2009

fDate

4-5 Oct. 2009

Firstpage

1

Lastpage

4

Abstract

This paper describes a novel power optimized RF amplifier with linear in dB gain steps. Using basic P-N junction diode in 45 nm CMOS process the implemented VGA provides large dynamic range with accurate linear-in-dB gain steps. The gain steps of the VGA do not depend on process variation and has a predictable variation across temperature. The VGA also has an automatic power reduction mechanism which reduces power consumption at low VGA gain.

Keywords

CMOS analogue integrated circuits; p-n junctions; power amplifiers; radiofrequency amplifiers; CMOS process; P-N junction diode; RF variable gain amplifier; VGA; automatic power consumption optimization; automatic power reduction mechanism; linear-in-dB gain step; power optimized RF amplifier; size 45 nm; CMOS process; Diodes; Dynamic range; Energy consumption; Gain; P-n junctions; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Temperature dependence; CMOS VGA; VGA; dB-linear; exponential gain control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems Workshop,(DCAS), 2009 IEEE Dallas

Conference_Location

Richardson, TX

Print_ISBN

978-1-4244-5483-9

Electronic_ISBN

978-1-4244-5484-6

Type

conf

DOI

10.1109/DCAS.2009.5505766

Filename

5505766