Electricity meter with multiple gains signal to an A/D...

Details Electricity meter with multiple gains signal to an A/D... Electricity meter with multiple gains signal to an A/D...

2005-09-13

2005-09-13

Nguyen, Vinh P. (Department: 2829)

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

Reexamination Certificate

active

06943539

ABSTRACT:
An auto-ranging electricity meter circuit having multiple current signal paths. Each of the current signal paths are amplified by a different amount of gain, and then applied to an ADC. The ADC then converts each of the amplified signals at different gains in a continuous process. The system analyzes the different sets of samples to determine which is the most accurate to use. Advantages include improved accuracy of an electricity meter using a lower cost A/D converter.

REFERENCES:
patent: 4182983 (1980-01-01), Heinrich et al.
patent: 4837504 (1989-06-01), Baer et al.
patent: 4931725 (1990-06-01), Hutt et al.
patent: 5657237 (1997-08-01), Mazzoni

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