Bias technique for low cost residential meter

Details Bias technique for low cost residential meter Bias technique for low cost residential meter

G - Physics

01

R

G01R 15/00 (2006.01) G01R 11/32 (2006.01) G01R 21/00 (2006.01) H02J 1/00 (2006.01) H02M 7/04 (2006.01)

Patent

CA 2501270

The invention contemplates an electrical power meter and method of operating the same, where the meter has electronic components (e.g., a power supply and a voltage sensing circuit) and receives alternating current (AC) voltage from an electrical power line. The inventive meter includes a power supply that converting the AC voltage to a direct current (DC) voltage for powering the electronic components. Also, the AC voltage provides an electrical reference potential for the electronic components. The inventive meter further includes a DC power source (e.g., a diode and/or a resistor in series connection) in a parallel circuit configuration with the AC voltage. The DC power source provides a DC bias voltage to the AC voltage. The AC voltage may create a relatively small voltage across the diode device.

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