Power supply with envelope tracking modulation
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United States of America Patent
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Aug 10, 2021
Grant Date -
Jul 30, 2020
app pub date -
Dec 27, 2019
filing date -
Jan 25, 2019
priority date (Note) -
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Abstract
A power supply configured to supply a modulated voltage to a power amplifier is shown. The power supply has an alternating current (AC) component generator, a direct current (DC) component generator, and a transition accelerator. The AC component generator generates an AC component of the modulated voltage according to an envelope tracking signal. The DC component generator generates a DC component of the modulated voltage according to the operational voltage range of the power amplifier. The transition accelerator is coupled to an output terminal of the DC component generator to speed up the transition of the modulated voltage.
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