Phase and amplitude disturbances in direct digital frequency synthesizers

The problem of the spurious phase and amplitude disturbances in direct digital frequency synthesizers (DDFS) at the digital-to-analog (DAC) output is discussed. Such a situation is met when a commercial synthesizer lacks the output filter (e.g., the whole set of the so-called Number-controlled oscil...

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Veröffentlicht in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control. - 1986. - 46(1999), 3 vom: 28., Seite 481-6
1. Verfasser: Kroupa, V F (VerfasserIn)
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 1999
Zugriff auf das übergeordnete Werk:IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Schlagworte:Journal Article
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520 |a The problem of the spurious phase and amplitude disturbances in direct digital frequency synthesizers (DDFS) at the digital-to-analog (DAC) output is discussed. Such a situation is met when a commercial synthesizer lacks the output filter (e.g., the whole set of the so-called Number-controlled oscillators) or is supplied, for some reasons, with a lower clock frequency. Authors of recent books on DDFS mention this phenomenon but lack to provide the explanation. The problem is dealt with in detail in this paper 
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