In this paper, we introduce a simple and well-defined approach for the design of fast settling amplifiers suitable for switched-capacitor circuits and characterized by low capacitive loads, in the order of few pico-farad. In the specific, the design is based on a new Bessel-like compensation that sets the phase of the closed-loop amplifier to be linearly related to the frequency, thus emulating the behavior of an ideal delay, like in a Bessel filter. The proposed Bessel-like approach is validated through the design and the simulation of two 3-stage amplifiers in a 65-nm CMOS process.

Bessel-like compensation of three-stage operational transconductance amplifiers

Giustolisi, Gianluca
;
Palumbo, Gaetano
2018-01-01

Abstract

In this paper, we introduce a simple and well-defined approach for the design of fast settling amplifiers suitable for switched-capacitor circuits and characterized by low capacitive loads, in the order of few pico-farad. In the specific, the design is based on a new Bessel-like compensation that sets the phase of the closed-loop amplifier to be linearly related to the frequency, thus emulating the behavior of an ideal delay, like in a Bessel filter. The proposed Bessel-like approach is validated through the design and the simulation of two 3-stage amplifiers in a 65-nm CMOS process.
2018
feedback amplifiers; frequency compensation; operational transconductance amplifier; robust design; settling time; Electronic, Optical and Magnetic Materials; Computer Science Applications1707 Computer Vision and Pattern Recognition; Electrical and Electronic Engineering; Applied Mathematics
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/331472
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