Regulator
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United States of America Patent
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Mar 17, 2015
Grant Date -
Sep 26, 2013
app pub date -
Aug 9, 2012
filing date -
Mar 21, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
The regulator has a differential circuit that generates a comparison signal corresponding to the difference between an input voltage and a voltage related to the output voltage, a first transistor that adjusts the output voltage in accordance with the comparison signal, a first current mirror circuit connected to a pair of differential output lines of the differential circuit, a second transistor that amplifies the high frequency signal superposed on the output voltage and sends the amplified signal to one of the differential output lines, a second current source that feeds current for amplifying the high frequency signal to the second transistor, a first capacitor, which accumulates charge therein as a result of the high frequency signal and controls the current flowing to one the pair of differential output lines via the second transistor in accordance with the charge quantity, and a second capacitor connected to the output voltage line.
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