Name
Title | ||
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2.3 A single-inductor dual-output converter with linear-amplifier-driven cross regulation for prioritized energy-distribution control of envelope-tracking supply modulator |
Abstract | ||
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RF-PAs in 4G LTE mobile devices handle modulated signals with high peak-to-average power ratios (PAPRs) while maintaining linearity and power efficiency. Envelope-tracking technology increases the efficiency of an RF-PA by modulating its supply voltage proportionally to the RF signals. The function of an envelope-tracking supply modulator (ETSM) is to track the envelope information and provide the same output voltage to the RF-PA. Figure 2.3.1 shows a conventional hybrid ETSM, which is comprised of a linear amplifier (LA) and a hysteresis-controlled switching regulator (SWR). Since the ETSM is mainly battery-powered, an additional SWR is required. This paper presents a single-inductor dual-output (SIDO) converter that removes both SWRs, as illustrated in Fig. 2.3.2, to speed up the performance of the ETSM. In the past, a cross-regulation (CR) effect was recognized as one the most critical drawbacks in the conventional design with single-inductor multiple-output (SIMO) converters, and numerous research papers have attempted to suppress CR [1,2]. In this paper, however, the proposed ETSM design, driven by the LA, makes effective use of the CR effect for achieving faster and efficient envelope tracking. Results show that, at a switching frequency of 2MHz, the proposed ETSM can deliver up to 2W of average output power with an efficiency of 82%. |
Year | DOI | Venue |
|---|---|---|
2017 | 10.1109/ISSCC.2017.7870248 | 2017 IEEE International Solid-State Circuits Conference (ISSCC) |
Keywords | Field | DocType |
single-inductor dual-output converter,linear-amplifier-driven cross regulation,prioritized energy-distribution control,envelope-tracking supply modulator,RF-PA efficiency,4G LTE mobile devices,peak-to-average power ratio,PAPR,power efficiency,envelope-tracking technology,supply voltage,RF signals,envelope information,linear amplifier,hysteresis-controlled switching regulator,SWR,battery-powered ETSM,SIDO converter,cross-regulation effect,CR effect,single-inductor multiple-output converters,SIMO converters,ETSM design,switching frequency,average output power,efficiency 82 percent | Electrical efficiency,Computer science,Voltage,Linearity,Inductor,Converters,Electronic engineering,Linear amplifier,Radio frequency,Electrical engineering,Switched-mode power supply | Conference |
ISBN | Citations | PageRank |
978-1-5090-3759-9 | 3 | 0.49 |
References | Authors | |
6 | 9 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Shang-Hsien Yang | 1 | 7 | 4.07 |
| Yen-Ting Lin | 2 | 6 | 2.27 |
| Yu-Sheng Ma | 3 | 3 | 1.51 |
| Hung-Wei Chen | 4 | 151 | 16.28 |
| Ke-Horng Chen | 5 | 379 | 90.04 |
| Chin-Long Wey | 6 | 316 | 56.51 |
| Ying-Hsi Lin | 7 | 112 | 30.84 |
| Shian-Ru Lin | 8 | 13 | 8.38 |
| Tsung-Yen Tsai | 9 | 37 | 20.41 |