The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2012
Filed:
Oct. 27, 2008
Rahul Singh, Austin, TX (US);
Dale Brummel, Spicewood, TX (US);
Hang Liu, Austin, TX (US);
Robert Leon Gorsegner, Austin, TX (US);
Edwin DE Angel, Austin, TX (US);
Jean Charles Pina, Austin, TX (US);
Rahul Singh, Austin, TX (US);
Dale Brummel, Spicewood, TX (US);
Hang Liu, Austin, TX (US);
Robert Leon Gorsegner, Austin, TX (US);
Edwin De Angel, Austin, TX (US);
Jean Charles Pina, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A power measurement and calibration system provides power and line frequency measurements by using a bandpass filter having complex voltage and current outputs from which real and imaginary power components can be determined. Calibration of the filter may be omitted if a complex wavelet filter is used to implement the bandpass filter and a determination of line frequency can also be provided for downstream use. A processor receiving data from the output of the filter can compute real and imaginary power, power factor and the line frequency. The filter may be implemented by a processor executing program instructions, or a digital circuit implementing the filter and optionally a CORDIC rotator for computing the current-to-voltage phase relationship can provide input to the processor for power measurement and calibration of the sample rate to line frequency relationship and for other uses.