Device and method for frequency generation

Details Device and method for frequency generation Device and method for frequency generation

1995-12-11

1998-06-02

Malzahn, David H.

Boots, shoes, and leggings

36471802, G06F 102, H03M 166

Patent

active

057611017

ABSTRACT:
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 (F.sub.r1) constituting the sum of the input code (F) and the random code (P) and for generating a second modulated signal (F.sub.r2) 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.

REFERENCES:
patent: 4901265 (1990-02-01), Kerr et al.
patent: 4951237 (1990-08-01), Essenwanger
patent: 5014231 (1991-05-01), Reinhardt et al.
patent: 5291428 (1994-03-01), Twitchell et al.
patent: 5554987 (1996-09-01), Ooga
Proceedings of the 1993 IEEE International Frequency Control Symposium, Victor S. Reinhardt, pp. 230-241 (2-4 Jun. 1993).

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