Coded data generation or conversion – Analog to or from digital conversion – Multiplex
Reexamination Certificate
2006-09-05
2006-09-05
Nguyen, Linh (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Multiplex
C341S118000, C341S120000
Reexamination Certificate
active
07102556
ABSTRACT:
A method and apparatus for obtaining power computation parameters is presented. Accurate computation of power requires multiplying voltage and current at the same instant of time and integrating the results over time. The present invention provides a method of using a single Analog to Digital Converter to convert both voltage and current for all the phases of any electrical system and then digitally compensating for the phase error caused by the non-simultaneous sampling of the current and voltage signals. The compensating filter could be implemented as a simple interpolator, an all-pass filter, or a combination of both. A single multiplexer is used to select which signal is processed by the Analog to Digital Converter. By scheduling and converting the voltage and analog signals one at a time, potential for crosstalk is significantly reduced, power requirement is reduced, and die size requirement is reduced.
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Nguyen Linh
TDK Semiconductor,Corp.
The Hecker Law Group, PLC
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