A wideband 0 to 60 dB CMOS variable gain amplifier for IR-UWB I/Q receivers

Author

Barras, David ; Jaeckel, Heinz ; Hirt, Walter

Author_Institution

Electron. Lab., ETH Zurich, Zurich, Switzerland

fYear

2009

fDate

14-18 Sept. 2009

Firstpage

264

Lastpage

267

Abstract

This paper reports on the realization of a variable gain amplifier (VGA) with an automatic gain control (AGC) loop for impulse-radio ultra-wideband (IR-UWB) signals. The circuit shows a gain range between 0 and 60 dB and a -3 dB bandwidth larger than 180 MHz over the whole gain range. The VGA also features a dual channel implementation for quadrature signal demodulation and shows very small I/Q imbalance. The circuit is fabricated in 0.18 mum technology, draws less than 5 mA from a 1.8 V supply voltage and occupies an area 1 mm².

Keywords

CMOS integrated circuits; amplifiers; automatic gain control; demodulation; microwave receivers; ultra wideband communication; CMOS variable gain amplifier; IR-UWB I-Q receivers; VGA; automatic gain control loop; dual channel implementation; gain -3 dB; gain 0 dB to 60 dB; impulse-radio ultrawideband signals; quadrature signal demodulation; size 0.18 mum; voltage 1.8 V; Bandwidth; Broadband amplifiers; Circuits; Cutoff frequency; Demodulation; Gain control; Laboratories; Pulse modulation; Transconductance; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

ESSCIRC, 2009. ESSCIRC '09. Proceedings of

Conference_Location

Athens

ISSN

1930-8833

Print_ISBN

978-1-4244-4354-3

Type

conf

DOI

10.1109/ESSCIRC.2009.5325977

Filename

5325977