This paper describes a chopper stabilized amplifier, obtained using an input chopper for modulation, an AC coupling for offset rejection and a correlated double sampling structure for demodulation, avoiding ripple spurs. The operational amplifier has a rail-to-rail input stage, with a supply voltage range from 1.8V to 5V. It is characterized by a multipath nested Miller compensation network with double pole-zero cancellation. The circuit achieves a simulated 130dB-dc-gain with a current consumption of 20μA, suitable for low-power application. Equivalent input offset has been evaluated by Montecarlo simulations demonstrating a maximum standard deviation of about 4μV. © 2013 IEEE.

A 36μW rail-to-rail-input chopper stabilized amplifier using correlated double sampling

De Blasi M.;De Matteis M.;D'Amico S.;Baschirotto A.
2013-01-01

Abstract

This paper describes a chopper stabilized amplifier, obtained using an input chopper for modulation, an AC coupling for offset rejection and a correlated double sampling structure for demodulation, avoiding ripple spurs. The operational amplifier has a rail-to-rail input stage, with a supply voltage range from 1.8V to 5V. It is characterized by a multipath nested Miller compensation network with double pole-zero cancellation. The circuit achieves a simulated 130dB-dc-gain with a current consumption of 20μA, suitable for low-power application. Equivalent input offset has been evaluated by Montecarlo simulations demonstrating a maximum standard deviation of about 4μV. © 2013 IEEE.
2013
978-1-4673-4581-1
978-1-4673-4580-4
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/442853
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