DETERMINING A CHARACTERISTIC OF A SIGNAL IN RESPONSE TO A CHARGE ON A CAPACITOR
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United States of America Patent
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app pub date -
Mar 14, 2013
filing date -
Feb 26, 2013
priority date (Note) -
Abandoned
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Abstract
In an embodiment, an apparatus includes a charging circuit and a determining circuit. The charging circuit is configured to generate a charge on a capacitor with a first current that is related to a signal having a characteristic, and the determining circuit is configured to determine the characteristic of the signal in response to the charge on the capacitor. For example, such an apparatus can determine an average of an input current to a power supply, or an average of an output current from a power source for the power supply, by mirroring the input current, charging a capacitor with the mirroring current, and determining the voltage across the charged capacitor.
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