Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Phase comparison
Patent
1990-03-08
1992-01-28
Wieder, Kenneth A.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Phase comparison
328134, 307516, G01R 2310
Patent
active
050846698
ABSTRACT:
An electrical circuit for producing a digital value which is representative of instantaneous phase of an electrical input signal relative to a reference frequency signal. The circuit includes a digital counter for continuously generating a stored count representing a value resulting from dividing the reference frequency signal by a repeating count cycle frequency which is of the same order as an expected center frequency of the electrical input signal. A trigger unit produces a trigger pulse in response to the trigger unit receiving a sampling pulse and a transition edge of the electrical input signal. An intermediate register stores a momentary state of the counter circuit in response to receiving the trigger pulse. The momentary state of the counter circuit corresponds to an instantaneous phase value of the electrical input signal. A correcting circuit is provided for correcting a resulting numerical value in the intermediate register by removing an accumulating phase offset value. An output register is provided for storing the corrected resulting numerical value of the counter circuit.
REFERENCES:
patent: 3764903 (1973-10-01), Griswold
patent: 4001682 (1977-01-01), Watt
patent: 4206414 (1980-06-01), Chapman
patent: 4310795 (1982-01-01), Fremerey
patent: 4341995 (1982-07-01), Hennick
patent: 4704574 (1987-11-01), Nossen
patent: 4733169 (1988-03-01), Grindahl
patent: 4876699 (1989-10-01), Nelson
patent: 4878231 (1989-10-01), Cok
patent: 4902920 (1990-02-01), Wolaver
patent: 4906941 (1990-03-01), Kato
patent: 4932036 (1990-06-01), Goradia
patent: 4959617 (1990-09-01), Martin
Solis Jose M.
Telefonaktiebolaget L M Ericsson
Wieder Kenneth A.
LandOfFree
Direct phase digitization 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 phase digitization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct phase digitization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1863030