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https://hdl.handle.net/10356/92153| Title: | A CMOS VGA with DC offset cancellation for direct-conversion receivers | Authors: | Zheng, Yuanjin Yan, Jiangnan Xu, Yong Ping |
Keywords: | DRNTU::Engineering::Electrical and electronic engineering | Issue Date: | 2009 | Source: | Zheng, Y., Yan, J., & Xu, Y.P. (2009). A CMOS VGA with DC Offset Cancellation for Direct-Conversion Receivers. IEEE Transactions on Circuits and Systems—I. 56(1), 103-113. | Series/Report no.: | IEEE transactions on circuits and systems—I | Abstract: | A CMOS dB-linear variable gain amplifier (VGA) with a novel I/Q tuning loop for dc-offset cancellation is presented. The CMOS dB-linear VGA provides a variable gain of 60 dB while maintaining its 3-dB bandwidth greater than 2.5 MHz. A novel exponential circuit is proposed to obtain the dB-linear gain control characteristics. Nonideal effects on dB linearity are analyzed and the methods for improvement are suggested. A varying-bandwidth LPF is employed to achieve fast settling. The chip is fabricated in a 0.35-µm CMOS technology and the measurement results demonstrate the good dB linearity of the proposed VGA and show that the tuning loop can effectively remove dc offset and suppress I/Q mismatch effects simultaneously. | URI: | https://hdl.handle.net/10356/92153 http://hdl.handle.net/10220/6276 |
ISSN: | 1549-8328 | DOI: | 10.1109/TCSI.2008.2010592 | Schools: | School of Electrical and Electronic Engineering | Rights: | © 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
| Appears in Collections: | EEE Journal Articles |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| A CMOS VGA with DC Offset Cancellation for Direct-Conversion Receivers.pdf | 1.96 MB | Adobe PDF |  View/Open |
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