Digital power meter apparatus and method for the same
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United States of America Patent
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Jan 23, 2007
Grant Date -
May 25, 2006
app pub date -
Nov 24, 2004
filing date -
Nov 8, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A digital power meter apparatus and the method for the same are proposed. The input voltage signal and input current signal through dual channels are processed at a first stage to obtained a first digital signal. The first digital signal is sent to a third low-pass filter. The input voltage signal and input current signal are processed in a second-stage processing through a first low-pass filter, a second low-pass filter and a second logic operation unit to obtain a second digital signal. A third logic operation unit processes the first digital signal and a second digital signal in order to obtain a digital power signal proportion to the product of the two input signals.
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