標題: | A 20MS/s Buck/Boost Supply Modulator for Envelope Tracking Applications with Direct Digital Interface |
作者: | Yang, Shang-Hsien Wey, Chin-Long Chen, Ke-Horng Lin, Ying-Hsi Chen, Jing-Jia Tsai, Tsung-Yen Lee, Chao-Cheng 交大名義發表 National Chiao Tung University |
關鍵字: | Supply modulator;envelope tracking;non-inverting buck/boost converter |
公開日期: | 2014 |
摘要: | a buck/boost supply modulator (BBSM) is proposed for 4G LTE RF power amplifier (RF-PA) envelope tracking applications. The H-bridges used in non-inverting buck/boost converters are metamorphosed into the current sources and switches of a 4-bit current-steering DAC-like supply modulator. Fast tracking speed is achieved through its inherent open-loop topology, while the direct digital interface provides easy control and integration with digital LTE baseband SoCs. The proposed BBSM is capable of delivering peak power of 2.8W at 20MS/s, with a peak efficiency of 75 %. |
URI: | http://hdl.handle.net/11536/135864 |
ISBN: | 978-1-4799-4089-9 |
期刊: | 2014 IEEE ASIAN SOLID-STATE CIRCUITS CONFERENCE (A-SSCC) |
起始頁: | 73 |
結束頁: | 76 |
顯示於類別: | 會議論文 |