H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/12 (2006.01) G01R 21/06 (2006.01) G01R 21/133 (2006.01) G06F 3/05 (2006.01) H03M 1/06 (2006.01) H03M 3/00 (2006.01)
Patent
CA 2490304
A meter for power lines includes first input channels having AC signals with DC values of about zero. A second input channel has an analog output with a predetermined non-zero DC bias value. Plural biasing and scaling circuits input the AC signals and output corresponding analog outputs. Plural analog-to- digital converters input the corresponding analog outputs and output corresponding digital values. A serial output circuit serially communicates the corresponding digital values for a first set of A/D conversions before serially communicating digital values for a subsequent second set of conversions without providing any synchronization of the corresponding digital values for both the first and second sets of conversions. A serial input circuit serially receives the serially communicated digital values and saves the same in a memory. A processor averages the digital values for the channels and determines whether only the average associated with the second channel has the DC bias value.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Corporation Eaton
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