A low power CMOS wideband variable gain amplifier

Chao Chun Sung*, Mei Fen Chou, Kuei-Ann Wen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A CMOS variable gain amplifier (VGA) with a wide gain control range is presented. The amplifier consists of a source-coupled pair with diode connected loads and a pseudo-exponential gain control circuit. The gain is obtained by a novel wide-range pseudo-exponential circuit topology. The proposed VGA was implemented in 0.1 Sum CMOS process which exhibits a 90-dB gain control range. The VGA draws 1.87 mW power from a 1.8-V supply per stage. Its wide bandwidth reveals that this design is well suited for wideband applications as 802.15.3a.

Original languageEnglish
Title of host publicationProceedings of the IASTED International Conference on Circuits, Signals, and Systems
EditorsM.H. Rashid
Pages126-129
Number of pages4
StatePublished - 1 Dec 2004
EventProceedings of the IASTED International Conference on Circuits, Signals, and Systems - Clearwater Beach, FL, United States
Duration: 28 Nov 20041 Dec 2004

Publication series

NameProceedings of the IASTED International Conference on Circuits, Signals, and Systems

Conference

ConferenceProceedings of the IASTED International Conference on Circuits, Signals, and Systems
CountryUnited States
CityClearwater Beach, FL
Period28/11/041/12/04

Keywords

  • Pseudo-exponential
  • Variable gain amplifier

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  • Cite this

    Sung, C. C., Chou, M. F., & Wen, K-A. (2004). A low power CMOS wideband variable gain amplifier. In M. H. Rashid (Ed.), Proceedings of the IASTED International Conference on Circuits, Signals, and Systems (pp. 126-129). [449-145] (Proceedings of the IASTED International Conference on Circuits, Signals, and Systems).