Dual instantaneous envelope tracking
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United States of America Patent
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Sep 13, 2016
Grant Date -
Oct 16, 2014
app pub date -
Apr 16, 2014
filing date -
Apr 16, 2014
priority date (Note) -
Withdrawn
status (Latency Note)
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Abstract
Power supply circuitry, which includes a parallel amplifier and a parallel amplifier power supply, is disclosed. The power supply circuitry operates in either an average power tracking mode or an envelope tracking mode. The parallel amplifier power supply provides a parallel amplifier power supply signal. The parallel amplifier regulates an envelope power supply voltage based on an envelope power supply control signal using the parallel amplifier power supply signal, which provides power for amplification. During the envelope tracking mode, the envelope power supply voltage at least partially tracks an envelope of an RF transmit signal and the parallel amplifier power supply signal at least partially tracks the envelope power supply control signal. During the average power tracking mode, the envelope power supply voltage does not track the envelope of the RF transmit signal.
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