2.1 GHz MOS mixer linearisation approach for IIP2 enhancement using multiple factor compensation
Year: 2013
Type: article
Abstract: An integrated downconversion CMOS mixer incorporating a comprehensive compensation scheme is presented which aims to minimise second‐order intermodulation distortion (IMD2). Unlike previously reported IMD2 calibration schemes which tune only one nonlinear factor at a time, the presented solution allows simultaneous adjustment of several different factors thus achieving a better compensation. The mixer has been implemented in UMC 0.18 µm CMOS to verify the proposed scheme and for comparison with alternative compensation methods. Measurements show that the solution described can improve the input intercept point (IIP2) by over 20 dB while maintaining good amplification and noise performance. IMD2 calibration results are presented and show useful advantages over other approaches. To the best of the authors' knowledge, this scheme for IMD2 calibration has not been previously reported.
Source: Electronics Letters
DOI: 10.1049/el.2013.0567
Authors: J. Jiang, D.M. Holburn
Institution: University of Cambridge
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2042093475