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This paper presents a chopper instrumentation amplifier designed in 28nm CMOS technology. The operational amplifier has a rail-to-rail folded cascode input stage, which ensures a constant gm over the available common-mode range. It is characterized by a Nested Miller compensation. All transistors operate in sub-threshold region; thus the opamp has been designed through a specific procedure for sub-threshold operation. The chopper technique is exploited to reduce the input referred offset and noise. The circuit operates with 0.9 V supply voltage and exhibits a simulated 106dB DC gain and 329kHz GBW. Montecarlo simulations demonstrate an offset distribution with 2.2μV standard deviation. The input noise spectral density is equal to 27nV/√Hz, giving a noise efficiency factor of 8.

Pipino, A., Pezzotta, A., Resta, F., DE MATTEIS, M., Baschirotto, A. (2016). A rail-to-rail-input chopper instrumentation amplifier in 28nm CMOS. In Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems (pp.73-76). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICECS.2015.7440252].

A rail-to-rail-input chopper instrumentation amplifier in 28nm CMOS

PIPINO, ALESSANDRA
Primo
;PEZZOTTA, ALESSANDRO
Secondo
;RESTA, FEDERICA;DE MATTEIS, MARCELLO
Penultimo
;BASCHIROTTO, ANDREA
Ultimo
2016

Abstract

This paper presents a chopper instrumentation amplifier designed in 28nm CMOS technology. The operational amplifier has a rail-to-rail folded cascode input stage, which ensures a constant gm over the available common-mode range. It is characterized by a Nested Miller compensation. All transistors operate in sub-threshold region; thus the opamp has been designed through a specific procedure for sub-threshold operation. The chopper technique is exploited to reduce the input referred offset and noise. The circuit operates with 0.9 V supply voltage and exhibits a simulated 106dB DC gain and 329kHz GBW. Montecarlo simulations demonstrate an offset distribution with 2.2μV standard deviation. The input noise spectral density is equal to 27nV/√Hz, giving a noise efficiency factor of 8.
slide + paper
chopper technique; instrumentation amplifier; nested miller compensation; sub-threshold operation; Cascode amplifiers; CMOS integrated circuits; Operational amplifiers; Reconfigurable hardware; Spectral density, Common Mode Range; Instrumentation amplifier; Nested miller compensation; Noise efficiency factors; Rail-to-rail input; Standard deviation; Sub-threshold regions; Subthreshold operation; Amplifiers (electronic)
English
IEEE International Conference on Electronics, Circuits, and Systems (ICECS), december 6-9
2015
Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems
9781509002467
2016
2016-
73
76
7440252
none
Pipino, A., Pezzotta, A., Resta, F., DE MATTEIS, M., Baschirotto, A. (2016). A rail-to-rail-input chopper instrumentation amplifier in 28nm CMOS. In Proceedings of the IEEE International Conference on Electronics, Circuits, and Systems (pp.73-76). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICECS.2015.7440252].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/123771
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