Direct digital synthesizer with tunable phase and amplitude error feedback structures

Author

Vankka, Jouko ; Lindeberg, Jonne ; Halonen, Kari

Author_Institution

Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

1

fYear

2003

fDate

25-28 May 2003

Abstract

The error feedback (EF) technique is used to suppress phase and amplitude spurs in direct digital synthesizers (DDS). It allows the reduction of word lengths of phase to amplitude converters and D/A converters. The drawback of the conventional phase EF is that it reduces the phase spurs only at DDS output frequencies, which are near DC or half the sampling frequency. New phase EF structures with arbitrary center frequency for cosine and quadrature output DDS are introduced. The cosine and quadrature DDS with tunable phase and amplitude EF were designed and implemented on a programmable logic device (PLD); our experimental results show their desired operation and performance.

Keywords

circuit feedback; circuit tuning; direct digital synthesis; error correction; programmable logic devices; DDS; PLD; amplitude spurs; arbitrary center frequency; cosine output; direct digital synthesizers; phase spurs; programmable logic device; quadrature output; spur suppression; tunable error feedback technique; Feedback; Frequency; Programmable logic devices; Sampling methods; Synthesizers;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205681

Filename

1205681