Digital power meter apparatus and method for the same

Details Digital power meter apparatus and method for the same Digital power meter apparatus and method for the same

2007-01-23

2007-01-23

Nguyen, Ha Tran (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

Reexamination Certificate

active

10995496

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.

REFERENCES:
patent: 5745323 (1998-04-01), English et al.
patent: 5760619 (1998-06-01), Yamaguchi
patent: 5764523 (1998-06-01), Yoshinaga et al.
patent: 5862069 (1999-01-01), Nestler
patent: 5872469 (1999-02-01), Nestler
patent: 6377037 (2002-04-01), Burns et al.
patent: 482901 (2002-04-01), None

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