Direct digital synthesizer with variable reference for...

Details Direct digital synthesizer with variable reference for... Direct digital synthesizer with variable reference for...

2008-01-01

2008-01-01

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C327S158000

Reexamination Certificate

active

07315215

ABSTRACT:
Improvement of quantization errors that arise in a delay line with finite resolution. A direct digital synthesizer (DDS), which contains a numerically controlled oscillator (NCO) and a digital-to-phase converter (DPC), is placed in the feedback loop of a phase locked loop (PLL). The DDS is used as a fractional divider of the voltage controlled oscillator (VCO) frequency, such that the reference frequency of the DDS is made variable. Alignment of the edges provided by the DDS delay line may then be adjusted. Mismatch errors in the DDS delay line are reduced by utilizing independently tunable delay elements.

REFERENCES:
patent: 4409564 (1983-10-01), Lo
patent: 5602884 (1997-02-01), Wieczorkiewicz et al.
patent: 2004/088846 (2004-10-01), None

Affiliated with

Also associated with

Rating

Direct digital synthesizer with variable reference for... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Direct digital synthesizer with variable reference for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct digital synthesizer with variable reference for... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2816050