Digital Signal Processing Expertise

We have leading expertise in multirate digital signal processing:

Low power multirate digital filters are a essential building block of oversampled ADCs like ΣΔ-Modulators. The digital Filter removes the out of band quantization noise and performs a sample rate reduction (decimation) to minimizes the data rate for subsequent signal processing stages.

We have special know-how in designing wave digital filters (WDF). Wave digital filters are less prone to limit cycles and consume less power than conventional filter structures.


Decimation Filter Architecture for ΣΔ ADC
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Decimation Filter
  • IIR Allpass realization:
  • Wave digital filter structures modelling analog LC filters
  • Inherit low sensitivity to component / coefficient variations
    Coefficients can be rounded to smaller word lengths reducing multiplier power and area consumption.
  • Less prone to limit cycles

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Design for Test – Build In Self Test (BIST)

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BIST Realisation

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