MURAL - Maynooth University Research Archive Library

    Digital Quadrature Mixing of Lowpass Sigma-Delta Modulators for Switch-mode Power Amplifiers

    Finnerty, Keith and Dooley, John and Farrell, Ronan (2011) Digital Quadrature Mixing of Lowpass Sigma-Delta Modulators for Switch-mode Power Amplifiers. In: European Conference on Circuit Theory and Design (ECCTD 2011), 29th-31st August 2011, Linkoping, Sweden.

    [img] Download (262kB)

    Share your research

    Twitter Facebook LinkedIn GooglePlus Email more...

    Add this article to your Mendeley library


    In this paper a phase compensation technique for the digital upconversion of a quadrature signal for amplification with switch mode power amplifiers is proposed. When a digital signal generator is used to generate the complex envelope signal care must be taken to compensate for the phase skew between the two paths. If phase compensation is not implemented an image caused by up converting the complex envelope of the modulation signal is created. By compensating for phase skew between the I and Q signal paths it is possible to remove this image signal and enable the transmission of multi carrier signals. As a direct result of this technique there is a reduction in the filtering effort at the output of the power amplifier to meet spectral mask requirements.

    Item Type: Conference or Workshop Item (Paper)
    Keywords: Component; power amplifiers; delta-sigma converters; class S;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Item ID: 3679
    Depositing User: Ronan Farrell
    Date Deposited: 23 May 2012 16:07
    Refereed: Yes
      Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

      Repository Staff Only(login required)

      View Item Item control page


      Downloads per month over past year

      Origin of downloads