Up-Conversion

  • Jouko Vankka
  • Kari Halonen
Chapter
Part of the The Springer International Series in Engineering and Computer Science book series (SECS, volume 614)

Abstract

The basic idea is that the DDS provides only a part of the output signal band, and up-conversion into the higher frequencies is carried out by analog techniques because the spurious performance and the power consumption are not good in the wide output bandwidth DDS (Figure 2.8, Figure 2.9). The critical 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.

Keywords

Phase Noise Local Oscillator Reference Frequency Output Frequency Loop Filter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • Jouko Vankka
    • 1
  • Kari Halonen
    • 1
  1. 1.Helsinki University of TechnologyFinland

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