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First-order correction for zero-order hold distortion in sampled-data filters

First-order correction for zero-order hold distortion in sampled-data filters

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Three 1st-order equalisers for zero-order hold distortion are described. Two, with z transform transfer functions, are suitable for applications with a variable sampling frequency. The other, for fixed sampling-frequency applications such as p.c.m., provides better equalisation with a simple RC network.

References

    1. 1)
      • D.P. Henkel , D.J. Nowak , P.E. Schmid . Digital-filter pre-correction for zero-order hold distortion. Electron. Lett. , 514 - 516
    2. 2)
      • R.K.P. Galpin . Variable electronic allpass delay networks. Electron. Lett. , 137 - 139
    3. 3)
      • W. Kuntz . A new sample-and-hold device and its application to the realisation of digital filters. Proc. Inst. Elect. Electron. Engrs.
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