MULTI MODE BIAS MODULATOR OPERATING IN ENVELOPE TRACKING MODE OR AVERAGE POWER TRACKING MODE AND ENVELOPE TRACKING POWER AMPLIFIER USING THE SAME

MULTI MODE BIAS MODULATOR OPERATING IN ENVELOPE TRACKING MODE OR AVERAGE POWER TRACKING MODE AND ENVELOPE TRACKING POWER AMPLIFIER USING THE SAME

A multi-mode bias modulator operating in envelope tracking mode or average power tracking mode and an envelope tracking power amplifier using the same are disclosed. The envelope tracking power amplifier includes a multi-mode bias modulator and a power amplifier. The multi-mode bias modulator genera...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: JUNG HEARYUN, YANG YOUNGOO, HAM JUNGHYUN
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRICITY
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Beschreibung
Zusammenfassung:A multi-mode bias modulator operating in envelope tracking mode or average power tracking mode and an envelope tracking power amplifier using the same are disclosed. The envelope tracking power amplifier includes a multi-mode bias modulator and a power amplifier. The multi-mode bias modulator generates a variable bias voltage using a linear amplifier and a switching amplifier operating in envelope tracking mode or average power tracking mode in accordance with an operation mode control signal that determines any one of envelope tracking mode and average power tracking mode. The power amplifier is biased in response to the variable bias voltage, power-amplifies a radio frequency (RF) signal, and outputs the amplified RF signal to an antenna.