Digital frequency synthesis

Details Digital frequency synthesis Digital frequency synthesis

2006-10-31

2006-10-31

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S131000, C341S143000

Reexamination Certificate

active

07130327

ABSTRACT:
Frequency synthesis is implemented by providing a delta-sigma modulated signal associated with a selected frequency, which frequency can vary based on a selection input. The delta-sigma modulated signal is converted from the digital to analog domain. The delta-sigma modulated signal can be provided directly from memory based on the selection input or, alternatively, it can be provided by a signal generator and processed by a delta-sigma modulator to provide the delta-sigma modulated signal. The selected frequency can be varied at a high rate of speed.

REFERENCES:
patent: 5574455 (1996-11-01), Hori et al.
patent: 5598440 (1997-01-01), Domagala
patent: 5859605 (1999-01-01), Raghavan et al.
patent: 6047018 (2000-04-01), Emi
patent: 6075474 (2000-06-01), Gabet et al.
patent: 6249229 (2001-06-01), Eckstein et al.
patent: 6437718 (2002-08-01), Oyama et al.
patent: 6437719 (2002-08-01), Noro et al.
patent: 6438434 (2002-08-01), Kamiya
patent: 6480129 (2002-11-01), Melanson
patent: 6498535 (2002-12-01), Allen et al.
patent: 6683905 (2004-01-01), King et al.
patent: 6748025 (2004-06-01), Hickling
patent: 2002/0063649 (2002-05-01), Viswanathan
patent: 2003/0067404 (2003-04-01), Ruha et al.
patent: 2003/0158721 (2003-08-01), Kato et al.
patent: 2003/0174026 (2003-09-01), Adachi et al.
patent: 2004/0192229 (2004-09-01), Morris et al.
patent: 2005/0062627 (2005-03-01), Jelonnek
patent: 2002-519924 (2002-07-01), None
patent: WO 98/33137 (1998-07-01), None
patent: WO 00/01072 (2000-01-01), None
US 6,496,127, 12/2002, Olson et al. (withdrawn)
Yunfeng Liang, and Yong Lian, “A 250MHz CMOS Bandpass Delta Sigma Modulator Using Continuous-Time Resonator Structure (Short Paper)”, date unknown.
European Search Report completed Jan. 29, 2004.
Dufort B et al: “Signal Generation using Periodic Single and Multi-Bit Sigma-Delta Modulated Streams” Proceedings of the International Test Confrerence. ITC '97. Washington, DC. Nov. 1-6 1997. International Test Conference, New York, NY: IEEE, US, vol. CONF. 28, Nov. 1, 1997, pp. 396-405, XP000800336 ISBN: 0-7803-4210-0 *figure 6B*.
M. Bellanger; “A DSP Perspective of Sigma-Delta Techniques and Applications in Communications”; 1995 International Symposium of Signals, Systems and Electronics; pp. 195-198.

Affiliated with

Also associated with

Rating

Digital frequency synthesis does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital frequency synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital frequency synthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3661843