High-speed tunable fractional-delay allpass filter structure

Ji Suk Park, Byeong Kuk Kim, Jin Gyun Chung, Keshab K Parhi

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


By using a fractional delay (FD), a filter can perform various operations such as asynchronous sample rate conversion, synchronization of digital modems and sound synthesis of musical instruments. An IIR tunable FD filter can be designed using Thiran-based FD allpass filter structure. However, this IIR structure has the disadvantage of long critical path and large hardware overhead. In this paper, a modified Thiran-based FD allpass filter structure is proposed. Compared with the existing structure, the proposed structure requires shorter critical path, less hardware complexity and improved frequency characteristics.

Original languageEnglish (US)
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - Jul 14 2003
EventProceedings of the 2003 IEEE International Symposium on Circuits and Systems - Bangkok, Thailand
Duration: May 25 2003May 28 2003


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