Voltage regulator with adaptive bias network
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United States of America Patent
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Feb 27, 2018
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N/A
app pub date -
Apr 29, 2016
filing date -
Apr 29, 2016
priority date (Note) -
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Abstract
A low drop-out voltage regulator includes an error amplifier that generates an amplified error voltage, the error amplifier including a first input for receiving a reference voltage, a second input for receiving a feedback voltage, a bias terminal for receiving an adaptive bias current, and an output. A pass gate providing an output voltage includes a first input connected to a supply voltage and a second input connected to the error amplifier output. A feedback network generating the feedback voltage includes a first terminal connected to the output of the pass gate and a second terminal connected to the second input of the error amplifier. An adaptive bias network providing the adaptive bias current includes a first transistor connected to the bias terminal of the error amplifier, a second transistor connected to the first transistor as a current mirror, and a third transistor connected in parallel with the pass gate.
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