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
- 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
Design for Test – Build In Self Test (BIST)