Patent ID: 7761249
Filing Date: 2010-07-20
Classification: H04Q

Abstract:
1. An electricity meter, comprising: a scaling unit configured to be coupled to at least one power line, the scaling unit operable to generate analog signals representative of at least one aspect of a power line signal on the power line; an analog-to-digital (A/D) converter coupled to receive analog signals from the scaling unit and generate digital measurement signals representative of the analog signals; a processing circuit operable to generate electricity metering information based on the digital measurement signals; a first filter stage operable to attenuate signals in a first frequency range that is higher than a frequency band of interest of the signal to be measured, the first filter stage operably coupled between the scaling unit and the A/D converter; and a second filter stage operable to attenuate signals in a second frequency range that is higher than the first frequency range, the second filter stage operably coupled between the scaling unit and the A/D converter.