Envelope Modulator for 1.5-W 10-MHz LTE PA Without AC Coupling Capacitor Achieving 86.5% Peak Efficiency
- Authors
- Sung, SiDuk; Hong, Sung-Wan; Bang, Jun-Suk; Paek, Ji-Seon; Lee, Seung-Chul; Cho, Thomas Byung-Hak; Cho, Gyu-Hyeong
- Issue Date
- Jan-2016
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- 10 MHz LTE; envelope modulator; high-frequency converter; low-frequency current-balancing technique; single-inductor dual-output
- Citation
- IEEE TRANSACTIONS ON POWER ELECTRONICS, v.31, no.12, pp 8282 - 8292
- Pages
- 11
- Journal Title
- IEEE TRANSACTIONS ON POWER ELECTRONICS
- Volume
- 31
- Number
- 12
- Start Page
- 8282
- End Page
- 8292
- URI
- https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/3143
- DOI
- 10.1109/TPEL.2016.2519243
- ISSN
- 0885-8993
1941-0107
- Abstract
- 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-μm CMOS process and achieves 86.5% peak efficiency while tracking a 10-MHz long-term evolution envelope signal.
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