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- W4380451083 abstract "This letter describes analog delays based on wideband, high-order, tunable active all-pass filters (APFs) with poles and zeros prescribed by the Padé approximation. The number of inductors in the <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${n}$ </tex-math></inline-formula> th-order APF does not exceed <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$lfloor n/2rfloor $ </tex-math></inline-formula> for a compact area, low insertion loss, and wide bandwidth. Delay tuning is accomplished via two control lines. The proposed sixth-order APF, implemented in TSMC 65-nm CMOS, exhibits a delay range from 250 ps (BW <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>10%</sub> = 0–8 GHz) to 400 ps (BW <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>10%</sub> = 0–5 GHz) and achieves the state-of-the-art DBW <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>10%</sub> = 2 for wideband APFs. Third- and fourth-order APFs were subsequently designed in GlobalFoundries 22-nm FDSOI CMOS for a 5G beamforming receiver operating from 24.3 to 28.7 GHz. The third- and fourth-order APFs exhibited 9–21 and 21–36 ps delay ranges, respectively, to generate beams from 0° to 35°." @default.
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- W4380451083 date "2023-08-01" @default.
- W4380451083 modified "2023-10-17" @default.
- W4380451083 title "Tunable Wideband High-Order Active Analog Delays With High Delay-Bandwidth Product" @default.
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- W4380451083 doi "https://doi.org/10.1109/lmwt.2023.3280395" @default.
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