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- W2022505772 abstract "This paper presents a novel spur suppression technique using a three-phase holding pulse for a direct digital synthesizer (DDS) with a two-phase holding digital-to-analog converter (2PH-DAC). A 2PH-DAC, which uses a reverse-sign step-function as a sampling pulse waveform instead of a commonly-used gate function of zeroth-order hold, enhances the first image of aliasing, which is of higher frequency than the fundamental. Therefore, the first image can be treated as a desired signal, while the fundamental and the second image are spurs for a DDS with a 2PH-DAC (2PH-DDS). The main problem of the 2PH-DDS is close spurs in the case that signal frequency is near Nyquist frequency or sampling frequency. This paper proposes a novel spur suppression technique for a 2PH-DDS. A configuration of a 2PH-DDS is first explained, and spectral properties are analyzed. Based on the analysis, a technique using a three-phase holding pulse to cancel spurs is proposed. Evaluated spur levels of the proposed synthesizer are from -51 to -34dBc, and are improved by 25dB or more by the proposed technique." @default.
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- W2022505772 date "2010-01-01" @default.
- W2022505772 modified "2023-09-25" @default.
- W2022505772 title "A Novel Spur Suppression Technique Using Three-Phase Holding Pulse for High-Frequency-Output Direct Digital Synthesizer" @default.
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- W2022505772 doi "https://doi.org/10.1587/transele.e93.c.1014" @default.
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