Watthour meter comprising a Hall sensor and a voltage-frequency converter for very low voltages
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United States of America Patent
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Feb 28, 1989
Grant Date -
N/A
app pub date -
Apr 9, 1987
filing date -
Apr 9, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A watthour meter having a Hall component in a sensor circuit connected to a low voltage type of voltage-to-frequency converter, achieves linear signal conversion of the voltage output from the sensor circuit with maximum polarity reversal of the Hall voltage by synchronizing such polarity reversal with polarity reversal across an integration capacitor of the converter so that the amplified offset voltage produced by the integration operation and the effects of capacitor instability compensate for each other.
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