Abstract
In this paper three different digital filter structures for decimation by a factor of 64 are compared. They are based on a commercially available decimator AD 7722 by Analog Devices. The AD 7722 is a complete low power ΣΔ analog-to-digital converter with the application in digital audio processing. The applied filter is a two-stage decimator which decreases the sample rate by 32 and 2 respectively. This structure is then compared to a state-of-the-art approach of a FIR decimator with six stages, each of them performing decimation by a factor of 2, and to two different approaches to an almost linear phase IIR decimator based on an very efficient class of lattice wave digital filters with also six down-samplers. The advantages and disadvantages of the selected structures are described.
| Original language | English |
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| Pages (from-to) | IV225-IV228 |
| Journal | Proceedings - IEEE International Symposium on Circuits and Systems |
| Volume | 4 |
| State | Published - 2003 |
| Event | Proceedings of the 2003 IEEE International Symposium on Circuits and Systems - Bangkok, Thailand Duration: 25 May 2003 → 28 May 2003 |