Name
Title | ||
|---|---|---|
An Energy Recycling Envelope Tracking Supply Modulator Assisted by Small Cap Replica With 89.7% Efficiency and 37% Reduced Linear Amplifier Current for 150 MHz Bandwidth 5G New Radio RF Applications |
Abstract | ||
|---|---|---|
This article proposes an envelope tracking supply modulator (ETSM) that recycles the originally wasted energy in the linear amplifier (LA) to generate negative voltage
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$V_{\mathrm {NEG}}$ </tex-math></inline-formula>
and achieve fast down tracking. With the insertion of
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$V_{\mathrm {NEG}}$ </tex-math></inline-formula>
, the negative slope of
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$I_{\mathrm {BUCK}}$ </tex-math></inline-formula>
becomes 25% larger.
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$V_{\mathrm {NEG}}$ </tex-math></inline-formula>
is also used to boost the input voltage of buck converter from 2
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$V_{\mathrm {BAT}}$ </tex-math></inline-formula>
to 2.6
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$V_{\mathrm {BAT}}$ </tex-math></inline-formula>
and raise the positive slope of
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$I_{\mathrm {BUCK}}$ </tex-math></inline-formula>
by 93%, which improves the transient response of buck converter and decreases
<inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\vert I_{\mathrm {LA}}\vert $ </tex-math></inline-formula>
by 37%. With energy recycling and high-bandwidth LA replica, ETSM supports 150-MHz 5G new radio (5G NR) application and achieves 89.7% efficiency when output power is 3.7 W. In addition, the proposed differential feedforward technique controls the operation of energy recycling precisely with the calibration logic. |
Year | DOI | Venue |
|---|---|---|
2022 | 10.1109/JSSC.2022.3172862 | IEEE Journal of Solid-State Circuits |
Keywords | DocType | Volume |
5G new radio (5G NR),energy recycling,envelope tracking (ET),fast transient buck converter,high-bandwidth linear amplifier (LA) | Journal | 57 |
Issue | ISSN | Citations |
11 | 0018-9200 | 0 |
PageRank | References | Authors |
0.34 | 11 | 9 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Chong-Sin Huang | 1 | 0 | 0.34 |
| Tzu-Yu Tzeng | 2 | 0 | 0.34 |
| Wei-Cheng Huang | 3 | 0 | 0.34 |
| Yi-Hsiang Kao | 4 | 0 | 0.34 |
| Jie-Lin Wu | 5 | 0 | 0.34 |
| Ke-Horng Chen | 6 | 379 | 90.04 |
| Ying-Hsi Lin | 7 | 3 | 2.22 |
| Shian-Ru Lin | 8 | 4 | 2.58 |
| Tsung-Yen Tsai | 9 | 4 | 2.58 |