A SiGe HBT variable gain amplifier with 80 dB control range for applications up to 3 GHz

Research output: Chapter in Book/Report/Conference proceedingsChapterpeer-review

Abstract

A variable gain amplifier suitable for wideband applications (up to 3 GHz) has been designed and fabricated in a SiGe BiCMOS process with fT = 49 GHz. Variable gain is achieved with a current steering differential cascode cell. The amplifier has a linear-in-dB gain range of 82 dB at 1.85 GHz and 65 dB at 2.5 GHz, which is the largest control range reported to date. The amplifier has a maximum gain of 18.5 dB, an OIP3 of 7.4 dBm, and a noise figure of 7.5 dB. The chip size is 1258 μm * 1209 μm, and it consumes 39 mA from a 3 V supply. The wideband nature of the VGA makes it suitable for integrated applications incorporating both cellular phone and wireless LAN functionality.

Original languageEnglish
Title of host publicationConference Proceedings - 7th European Conference on Wireless Technology, ECWT2004
Pages193-196
Number of pages4
Publication statusPublished - 2004
EventConference Proceedings - 7th European Conference on Wireless Technology, ECWT2004 - Amsterdam, Netherlands
Duration: 11 Oct 200412 Oct 2004

Publication series

NameConference Proceedings - 7th European Conference on Wireless Technology, ECWT2004

Conference

ConferenceConference Proceedings - 7th European Conference on Wireless Technology, ECWT2004
Country/TerritoryNetherlands
CityAmsterdam
Period11/10/0412/10/04

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