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- W4387609077 abstract "Envelope tracking (ET) and average power tracking (APT) have been widely used as supply modulators of power amplifiers (PAs). To meet the new challenges brought by the 5G NR standard, the symbol power tracking (SPT) technique is proposed, which is more efficient than ET and more flexible than APT. For the application of subcarrier spacing (SCS) of 15- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$sim$</tex-math> </inline-formula> 60kHz in the frequency range 1 (FR1), this paper proposed a buck-boost SPT supply modulator with a transition time below 1.17- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu $</tex-math> </inline-formula> s for 5G NR PA in the smartphone. The combination of three techniques improves the voltage transition speed. The charge-pump-based switching power modulator increases the output voltage higher than the battery voltage and offers a high voltage source for the auxiliary current paths (ACP). The ACP introduces additional currents to charge/discharge the 1- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu $</tex-math> </inline-formula> F output capacitor. The end-point-prediction (EPP) scheme lets the compensator convert directly from one steady state to the next. This supply modulator circuit is designed and fabricated using 0.18- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu $</tex-math> </inline-formula> m BCD technology. The output voltage range is 1–5-V. The maximum transition speed can be up to 0.37- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu $</tex-math> </inline-formula> s/V and 0.15- <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$mu $</tex-math> </inline-formula> s/V for up-tracking and down-tracking, respectively." @default.
- W4387609077 created "2023-10-14" @default.
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- W4387609077 date "2023-01-01" @default.
- W4387609077 modified "2023-10-14" @default.
- W4387609077 title "A 0.15-$mu $s/V Buck-Boost Symbol-Power-Tracking Supply Modulator With Dual Auxiliary Current Paths and EPP Scheme for 5G NR Power Amplifiers" @default.
- W4387609077 doi "https://doi.org/10.1109/tcsi.2023.3310240" @default.
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