DEVICE AND METHOD FOR LINEAR AMPLIFIER

PROBLEM TO BE SOLVED: To disperse and remove mixed modulation components by canceling input RF signals and the output of a power amplifier, extracting the component of a mixed modulation signal, amplifying an error, connecting the amplified mixed modulation signal and the output of the power amplifi...

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Bibliographische Detailangaben
Hauptverfasser:	CHANG IK-SOO, CHUNG SEUNG-WON, JEONG SOONUL, LEE SEONG-HOON, LEE YOUNG-KON, PARK JONG-TAE, KIM CHUL-DONG, KIM HONG-KEE, KIM YOUNG
Format:	Patent
Sprache:	eng
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY MULTIPLEX COMMUNICATION TRANSMISSION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To disperse and remove mixed modulation components by canceling input RF signals and the output of a power amplifier, extracting the component of a mixed modulation signal, amplifying an error, connecting the amplified mixed modulation signal and the output of the power amplifier and secondarily suppressing the mixed modulation signal. SOLUTION: A feed forwarding system for primarily suppressing the mixed modulation signal in a pre-distortion unit 213 and for finally suppressing the mixed modulation signal is applied. A linear amplifier using the feed forwarding system cancels the component of the pure RF signal and extracts the mixed modulation signal from the output of the power amplifier 214. The extracted mixed modulation signal is connected to a connector 223 and the mixed modulation component is canceled. When the feed forward system is used, only the component of the pure RF signal obtained by suppressing and amplifying the mixed modulation signal component contained in the signal amplified in the maximum output terminal of the linear amplifier can be outputted.