Piece-wise parabolic interpolation for direct digital frequency synthesis

Ahmed M. Eltawil, Babak Daneshrad

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

In this paper, a compact architecture and implementation for direct digital frequency synthesis (DDFS) is presented. It uses a smaller lookup table for sinusoidal functions compared to existing architectures. The computation of the sinusoidal values is performed by a parabolic interpolation structure, thus only interpolation coefficients need to be stored in the Read-Only Memory (ROM). The ROM size is consistently less than 1 Kbits for SFDR values up to 85 dBc.
Original languageEnglish (US)
Title of host publicationProceedings of the Custom Integrated Circuits Conference
StatePublished - Jan 1 2002
Externally publishedYes

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