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  • Rusu, Ana, et al. (author)
  • Low-distortion bandpass Sigma-Delta modulator for wireless radio receivers
  • 2005
  • In: Electronics Letters. - : Institution of Engineering and Technology (IET). - 0013-5194 .- 1350-911X. ; 41:19, s. 1044-1046
  • Journal article (peer-reviewed)abstract
    • A low-distortion bandpass sigma-delta modulator is proposed. It was found that the key to improving linearity is to add a feedforward signal path in a double-delay resonator bandpass structure. The proposed technique improves the tonal behaviour even at low oversampling ratio and can be applied for any order of modulator. Based on the proposed architecture, a fourth-order single-bit sigma-delta modulator can achieve a dynamic range of 84 dB and a spurious free dynamic range of 98 dB at 10.71 MHz with a signal bandwidth of 200 kHz, making it ideal for a narrowband IF-sampled wireless receiver designed for compliance with GSM/GPRS standards.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Ismail, Mohammed (1)
Rusu, Ana (1)
University
Royal Institute of Technology (1)
Language
English (1)
Year
2005 (1)

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