Line frequency synchronization

Data processing: measuring – calibrating – or testing – Calibration or correction system – Signal frequency or phase correction

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

07747405

ABSTRACT:
This invention relates to line frequency synchronisation for use in diagnostics for alternating current electrical circuits. The invention provides a method of synchronising measurement system frequency with an alternating current line frequency comprising the steps of: adjusting the frequency of the measurement system frequency using a frequency locked loop until the measurement system frequency is within a predetermined range of said alternating current line frequency; and when the measurement system frequency is within a predetermined range of said alternating current line frequency adjusting the phase and the frequency of the measurement system frequency using a phase and frequency locked loop.

REFERENCES:
patent: 4535378 (1985-08-01), Endo et al.
patent: 4539683 (1985-09-01), Hahn et al.
patent: 4679028 (1987-07-01), Wilson
patent: 5128625 (1992-07-01), Yatsuzuka et al.
patent: 5293082 (1994-03-01), Bathaee
patent: 5324989 (1994-06-01), Thornton et al.
patent: 5552881 (1996-09-01), Jezwinski et al.
patent: 5594439 (1997-01-01), Swanson
patent: 5621603 (1997-04-01), Adamec et al.
patent: 5671147 (1997-09-01), McKim et al.
patent: 5774321 (1998-06-01), Kim et al.
patent: 5828710 (1998-10-01), Beale
patent: 5867014 (1999-02-01), Wrathall et al.
patent: 5896263 (1999-04-01), Terdan et al.
patent: 5909660 (1999-06-01), Foote et al.
patent: 6061006 (2000-05-01), Hopkins et al.
patent: 6125024 (2000-09-01), LeComte et al.
patent: 6304582 (2001-10-01), Zhang et al.
patent: 6320283 (2001-11-01), Salim et al.
patent: 6351835 (2002-02-01), Sakaguchi
patent: 6400163 (2002-06-01), Melcher et al.
patent: 6459599 (2002-10-01), Agirmann et al.
patent: 6557131 (2003-04-01), Arabi
patent: 6594129 (2003-07-01), Baba et al.
patent: 6653963 (2003-11-01), Barrenscheen et al.
patent: 6657464 (2003-12-01), Balardeta et al.
patent: 6768350 (2004-07-01), Dickey
patent: 6771590 (2004-08-01), Marchok et al.
patent: 7219037 (2007-05-01), Pupalaikis et al.
patent: 2003/0043521 (2003-03-01), Thiele
patent: 2003/0063679 (2003-04-01), Scrofano
patent: 2004/0125007 (2004-07-01), Pezzini
patent: 2005/0135037 (2005-06-01), Thiery et al.
patent: 2005/0154945 (2005-07-01), Haag et al.
patent: 2005/0174273 (2005-08-01), Luo et al.
patent: 2005/0248477 (2005-11-01), Jongsma et al.
patent: 2006/0061303 (2006-03-01), Takeda et al.
patent: 2006/0215064 (2006-09-01), Dawson et al.
patent: 2007/0155413 (2007-07-01), Kerstenbeck
patent: 19750349 (1998-05-01), None
patent: 0325786 (1989-08-01), None
patent: 0789458 (1997-08-01), None
patent: 1322139 (2003-06-01), None
patent: 1545163 (2005-06-01), None
patent: WO3107019 (2003-12-01), None
patent: 55096708 (1980-07-01), None
patent: 60236073 (1985-01-01), None
patent: 08023244 (1996-01-01), None
European Search Report for European Application 06114802.9, Sep. 5, 2006, European Patent Office.
European Search Report for European Application 06114803.7, Sep. 1, 2006, European Patent Office.
European Search Report for European Application 06114806.0, Aug. 30, 2006, European Patent Office.
European Search Report for European Application 06114800.3, Sep. 1, 2006, European Patent Office.
European Search Report for European Application 06114804.5, Aug. 18, 2006, European Patent Office.
European Search Report for European Application 06114805.2, Aug. 24, 2006, European Patent Office.
European Search Report for European Application 06114801.1, Sep. 11, 2006, European Patent Office.
Sigma-Delta-ADC in Software, Design&Elektronik, Product Brochure, 1998, pp. 1-18, XP002398239.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

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

Rate now

     

Profile ID: LFUS-PAI-O-4223344

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.