Method and apparatus for reconfigurable frequency generation

Details Method and apparatus for reconfigurable frequency generation Method and apparatus for reconfigurable frequency generation

2005-05-24

2005-05-24

Ton, My-Trang Nu (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synthesizer

Reexamination Certificate

active

06897687

ABSTRACT:
A frequency generator (10) includes a direct digital synthesizer (14) having an accumulator (18or28) for providing an interim output and a digital interpolator (16) for interpolating the interim output to provide an output signal with reduced electromagnetic interference. The digital interpolator can include at least one converter among a digital-to-phase converter (22) or a digital-to-time converter (32). The frequency generator can further include a digitally programmable spreading function (12) applied to an input of the direct digital synthesizer.

REFERENCES:
patent: 5430764 (1995-07-01), Chren, Jr.
patent: 5488627 (1996-01-01), Hardin et al.
patent: 5521533 (1996-05-01), Swanke
patent: 5864492 (1999-01-01), Sadot
patent: 6753706 (2004-06-01), Ho

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