Electricity meter with a switching mode transformer power supply circuit
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United States of America Patent
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-
Oct 26, 1999
Grant Date -
N/A
app pub date -
Jun 24, 1998
filing date -
Jul 17, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electronic electricity meter comprising a measuring circuit and a power supply circuit. The power supply circuit comprises a main capacitor and a transformer controlled by a switching mode circuit. The transformer has an additional winding between the core and the primary and an integrator circuit rated to supply at its output a voltage image substantially proportional to the main capacitor voltage.
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