| 摘要 |
The invention relates to a device for reducing unwanted frequency components in digital frequency generation, comprising an accumulator device (4, 5) for generating output signals depending on an input code (F) corresponding to a desired frequency, the accumulator device (4, 5) being connected to at least one memory unit (6, 7) which comprises codes corresponding to wave shapes, and further comprising a generator (1) for generating a random code (P) and a digital/analog converter (9) for generating analog wave shapes. The invention is characterized in that it comprises modulation means (2, 3) for generating a first modulated signal (Fr1) constituting the sum of the input code (F) and the random code (P) and for generating a second modulated signal (Fr2) constituting the difference between the input code (F) and the random code (P), and a calculation unit (8) for regenerating a code corresponding to said input code (F). The invention provides a reduction of unwanted frequency components, so-called spurious components.
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