Analogue-to-digital transform to preserve the frequency-magnitude characteristics of all-pole filters

@inproceedings{Bolton1984AnaloguetodigitalTT,
  title={Analogue-to-digital transform to preserve the frequency-magnitude characteristics of all-pole filters},
  author={Alan G. Bolton},
  year={1984}
}
When the bilinear transform is applied to an all-pole analogue filter, zeros are obtained in the derived digital transfer function. The corresponding digital-filter structure must provide feedforward terms. A new transform is described which enables implementation without feedforward terms. The frequency-magnitude characteristic is preserved, though not the phase, and the frequency warping differs from that of the bilinear transform. In addition a technique to compensate for a zero-order hold… CONTINUE READING