Envelope Modulator for 1.5-W 10-MHz LTE PA Without AC Coupling Capacitor Achieving 86.5% Peak Efficiency

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An envelope modulator (EM) is presented to increase the efficiency of an RF power amplifier. In order to supply an output voltage higher than the input voltage while providing low-frequency power in the EM, a single-inductor dual-output (SIDO) converter is introduced. By employing the SIDO converter, the EM does not require an additional boost converter. In addition, a high-frequency converter (HFC) with a wide-bandwidth capability is also proposed. These two converters, the SIDO converter and the HFC, are combined in parallel without an ac coupling capacitor by employing a low-frequency current-balancing technique. The chip is implemented in a 0.18-mu m CMOS process and achieves 86.5% peak efficiency while tracking a 10-MHz long-term evolution envelope signal
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2016-12
Language
English
Article Type
Article
Keywords

TRACKING POWER-AMPLIFIER; SUPPLY MODULATOR; POLAR TRANSMITTERS; CONVERTER; EDGE

Citation

IEEE TRANSACTIONS ON POWER ELECTRONICS, v.31, no.12, pp.8282 - 8292

ISSN
0885-8993
DOI
10.1109/TPEL.2016.2519243
URI
http://hdl.handle.net/10203/212863
Appears in Collection
EE-Journal Papers(저널논문)
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