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초록
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.
키워드
- 제목
- Envelope Modulator for 1.5-W 10-MHz LTE PA Without AC Coupling Capacitor Achieving 86.5% Peak Efficiency
- 저자
- Sung, SiDuk; Hong, Sung-Wan; Bang, Jun-Suk; Paek, Ji-Seon; Lee, Seung-Chul; Cho, Thomas Byung-Hak; Cho, Gyu-Hyeong
- 발행일
- 2016-01
- 유형
- Article
- 권
- 31
- 호
- 12
- 페이지
- 8282 ~ 8292