Voltage regulator circuit
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United States of America Patent
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Nov 6, 2012
Grant Date -
Jul 1, 2010
app pub date -
Dec 30, 2008
filing date -
Dec 30, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the invention includes a regulator circuit that regulates a substantially constant magnitude of an output voltage at an output node. The circuit includes a master stage configured to set a first threshold voltage and a second threshold voltage. The first threshold voltage can have a magnitude that is greater than the second threshold voltage. The circuit also includes a charging follower stage configured to conduct a first current from a first power rail to the output node. The first current can increase in response to a transient decrease of the output voltage relative to the first threshold voltage. The circuit further includes a discharging follower stage configured to conduct a second current from the output node to a second power rail. The second current can increase in response to a transient increase of the output voltage relative to the second threshold voltage.
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