Voltage regulator with compensation to inhibit undershoot
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United States of America Patent
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Nov 4, 2014
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app pub date -
Sep 21, 2011
filing date -
Oct 4, 2010
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Abstract
The voltage regulators are capable of limiting undershoots of the output voltage without having a similar effect on overshoots because of the presence of a current cancellation network, input with the reference voltage and coupled to the second input of the error amplifier. This current cancellation network is adapted to inject into the second input a unidirectional compensation current of the first and second currents injected by the first and second feedback networks, respectively, the compensation current being determined by time variations of the difference between a replica of the output regulated voltage and the reference voltage and/or by time variations of the reference voltage.
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