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Conference Paper
포락선 추적 전력 증폭기를 위한 광대역 전원 변조기
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- Issue Date
- 2012-06
- Citation
- 대한전자공학회 종합 학술 대회 (하계) 2012, pp.399-402
- Publisher
- 대한전자공학회
- Language
- Korean
- Type
- Conference Paper
- Abstract
- This paper presents a supply modulator fabricated in 130nm CMOS process for an envelope tracking power amplifier. For a high PAPR LTE signal, a rail-to-rail folded cascode class AB linear amplifier is used for wideband and linear operation while high efficiency is achieved by a buck converter for low frequency components of a LTE envelope signal. The designed supply modulator could support delivered output power up to about 32dBm to a 3.25ohm load with peak efficiency of 89.8%.
- KSP Keywords
- BUCK converter, CMOS Process, Class AB(CAB), Envelope Tracking Power Amplifier, Envelope signal, High PAPR, Low-frequency component, Output power, Peak efficiency, Supply modulator, envelope tracking(ET)