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Bandpass sigma-delta modulation

Bandpass sigma-delta modulation

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A bandpass version of sigma-delta modulation is presented, with simulation results for second- and fourth-order convertors. For the fourth-order convertor operating at 8 MHz, simulations demonstrate a resolution of 16 bits over an 8 kHz band centred at 1 MHz. Applications may include analogue/digital conversion for AM radio, and digital/analogue conversion for narrowband RF systems.

References

    1. 1)
      • J.C. Candy , A. Huynh . Double interpolation for digital-toanalog conversion. IEEE Trans. , 77 - 81
    2. 2)
      • Lee, W.L.: `A novel higher order interpolative modulator topology for high resolution oversampling A/D converters', June 1987, Master's thesis, Massachusetts Institute of Technology, p. 34–36.
    3. 3)
      • S.R. Norsworthy , I.G. Post , H.S. Fetterman . A 14-bit 80-kHz sigma-delta A/D converter: modeling, design, and performance evaluation. IEEE J. Solid-State Circuits , 256 - 266
    4. 4)
      • B.E. Boser , B.A. Wooley . The design of sigma-delta modulation analog-to-digital converters. IEEE J. Solid-State Circuits , 1298 - 1308
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