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- W4313854315 abstract "This letter presents a chopper-stabilized multipath operational amplifier (OPA). By utilizing a 7-bit MOS-DAC-based offset calibration along with a passive ripple reduction filter, the OPA achieves a low input ripple in a power-efficient manner. The prototype IC is implemented in a 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>$mu text{m}$ </tex-math></inline-formula> standard CMOS process and draws 0.85-mA current from a 5-V supply. The chopper OPA exhibits the minimal input ripple of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$0.24~mu text{V}$ </tex-math></inline-formula> (eight samples), which corresponds to an <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$80times $ </tex-math></inline-formula> reduction on the prior-art current-DAC-based offset calibration and a <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$1.6times $ </tex-math></inline-formula> reduction on the existing ripple reduction loops. In addition, this OPA exhibits excellent input-referred offset ( <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$8~mu text{V}$ </tex-math></inline-formula> ), input-referred noise density (16 nV/ <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$surd $ </tex-math></inline-formula> Hz), and power efficiency (GBW/ISUPPLY = 11.8)." @default.
- W4313854315 created "2023-01-10" @default.
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- W4313854315 date "2023-01-01" @default.
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- W4313854315 title "A 0.24-<i>μ</i>V-Input-Ripple 8-<i>μ</i>V-Input-Offset 10-MHz Chopper Operational Amplifier Employing MOS-DAC-Based Offset Calibration" @default.
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- W4313854315 doi "https://doi.org/10.1109/lssc.2023.3235115" @default.
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