Power amplifying apparatus and wireless signal transmitter utilizing the same
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United States of America Patent
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Oct 7, 2014
Grant Date -
Jun 19, 2014
app pub date -
Dec 19, 2012
filing date -
Dec 19, 2012
priority date (Note) -
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Abstract
A power amplifying apparatus is provided. A reference signal generator provides a reference signal having an enabling state and a disabling state. A digital power amplifier generates a current based on the reference signal and an input signal. An output signal of the digital power amplifier is related to the current. When the reference signal is in the enabling state, the current is related to the input signal. When the reference signal is in the disabling state, the current is irrelevant to the input signal. During the enabling state of the reference signal, a data generator provides an output alternating between an in-phase signal and a quadrature-phase signal as the input signal to the digital power amplifier. When the reference signal is in the disabling state, the data generator provides a fixed signal as the input signal to the digital power amplifier.
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