Direct digital synthesizer system and related methods

Details Direct digital synthesizer system and related methods Direct digital synthesizer system and related methods

2005-08-16

2009-10-06

Ngo, Chuong D (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07599977

ABSTRACT:
A direct digital synthesizer (DDS) has reduced spurious signals and includes a DDS core that produces a digital representation of a signal to be synthesized. A plurality of DDS circuits are operatively connected to the DDS core, each having a digital-to-analog converter connected to the DDS core for receiving the digital representation and converting it into a signal. A modulator is operatively connected to an oscillator circuit and digital-to-analog converter for receiving signals from the digital-to-analog converter and producing a modulated output signal. The individual frequencies of the respective DDS circuits are randomly and continuously changed from each other. A mixer receives and mixes the modulated output signals from the plurality of DDS circuits to create a mixed output signal at a selected and fixed frequency.

REFERENCES:
patent: 4951237 (1990-08-01), Essenwanger
patent: 5291428 (1994-03-01), Twitchell et al.
patent: 5886752 (1999-03-01), Cross
patent: 6414555 (2002-07-01), Staszewski et al.
patent: 6483388 (2002-11-01), Khan
patent: 6522176 (2003-02-01), Davis
patent: 7103327 (2006-09-01), Pan
patent: 2004/0210611 (2004-10-01), Gradishar et al.
patent: 2005/0077935 (2005-04-01), Giuroiu

Affiliated with

Also associated with

Rating

Direct digital synthesizer system and related methods 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 system and related methods, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct digital synthesizer system and related methods will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4106743