Digital circuit and method for measuring AC voltage values
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United States of America Patent
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Nov 8, 2016
Grant Date -
Jun 20, 2013
app pub date -
Sep 28, 2012
filing date -
Dec 19, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
An AC measurement circuit includes a rectifier for receiving an AC signal; a peak detection circuit; and a voltage divider, interconnected with an output of the rectifier, and the input of the peak detection circuit to provide the peak detection circuit with a voltage value equal to a fraction of the AC signal. An analog to digital converter, has its analog input interconnected with an output of the peak detection circuit, for providing a digital output corresponding to its analog input. A summing circuit sums n samples of the digital output. The voltage divider is configured so that the summing circuit calculates an average measurement of the AC signal by summing n samples and without floating point division.
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International Classification(s)
- H02J:CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR D....
- G06F:ELECTRIC DIGITAL DATA PROCESSING
- G01R:MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC V....
- G01B:MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIME....
- F16H:GEARING
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
- H02H:EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
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