Titlebook: Direct Digital Synthesizers; Theory, Design and A Jouko Vankka,Kari Halonen Book 2001 Springer Science+Business Media Dordrecht 2001 CMOS.M

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Talking with Computers: Fact or Fiction?ored in the ROM (e.), the digital-to-analog conversion (e.), a post-filter (e.), the phase noise of the clock frequency (n.), and the frequency error (Δ.). The frequency error (Δ.) causes a frequency offset (2.2), but not noise and spurs.

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Discourse Characteristics in Aphasiaical path of the signal could be accomplished by the DDS, which has the advantages of a fast switching time, a fine frequency resolution, and a coherent frequency hopping. Three up-conversion possibilities are introduced in this chapter: a DDS/PLL hybrid, a DDS/mixer hybrid and a DDS quadrature modulator.

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Spoken Grammar: Vague Language and EAP been presented in [Rof98]. The transmitter is part of a complete low-power transceiver operating in the 902-928 MHz ISM frequency band, which is one of the three Industrial, Scientific and Medicine (ISM) frequency bands opened in the USA by the Federal Communications Commission (FCC) for unlicensed spread-spectrum use.

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Direct Digital Synthesizer with an On-Chip D/A-Converter,n until recently. Earlier DDSs were limited to producing narrow bands of closely spaced frequencies, due to limitations of digital logic and D/A-converter technologies. Recent advantages in integrated circuit (IC) technologies have brought about remarkable process in this area.

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Multi-Carrier QAM Modulator,d by the European Telecommunications Standards Institute (ETSI) for wideband wireless access to support third-generation services. This technology is optimized to make possible very high-speed multimedia services such as full-motion video, Internet access and videoconferencing.

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Conclusions,so includes the interface to baseband circuitry and system level design aspects of digital communication systems. The theoretical analysis gives an overview of the functioning of DDS, especially with respect to noise and spurs. Although most of this material is already present in the literature, the author extends the analysis at several places: