A wideband linear-in-dB VGA using a CMOS in the triode region

This paper presents a wideband variable gain amplifier (VGA) fabricated using the 0.18-mu m CMOS process. An exponential CMOS triode transconductor scheme is proposed to achieve highly linear-in-dB characteristics of a VGA for ultra-wideband (UWB) systems. The proposed VGA achieves a linear-in-dB controllable gain range of 28.4 dB (7 to -21.4 dB) with a bandwidth of 1200 MHz, while drawing only, 2.7 mA from a 1.8-V power supply. Measurements show a linear gain range with a linearity error of less than +/- 0.5 dB. P-1dB varies from -8.5 to -6 dBm. The chip occupies an area of 0.2 x 0.2 mm(2), excluding bond-pads. (c) 2006 Wiley Periodicals. Inc.
Publisher
JOHN WILEY & SONS INC
Issue Date
2006-05
Language
ENG
Keywords

VARIABLE GAIN AMPLIFIER

Citation

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, v.48, no.5, pp.997 - 1000

ISSN
0895-2477
DOI
10.1002/mop.21546
URI
http://hdl.handle.net/10203/3740
Appears in Collection
EE-Journal Papers(저널논문)
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