A low-noise fully differential recycling folded cascode neural amplifier

Sammy Cerida, Erick Raygada, Carlos Silva, Manuel Monge

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

This paper describes the design of an amplifier to be used as part of a neural recording system. The architecture of this amplifier was based on a fully differential folded cascode (FDFC) amplifier and adapted to a recycling architecture [1] which reuses currents in order to achieve better performance. Furthermore, as we are designing a neural amplifier, a low input-referred noise is required due to the small amplitude of neural signals, as they could be as small as 1 μV. The recycling architecture was optimized for low-noise, and simulated in AMS 0.35 μm CMOS process. An input-referred noise of 1.16 μVrms was achieved while consuming 66.03 μW from a 3.3 V supply, which corresponds to NEF=2.58. The open-loop gain of the amplifier is 111.25 dB and the closed-loop gain is 42.10 dB with a bandwidth of 6.02 kHz.

Original languageEnglish
Title of host publication2015 IEEE 6th Latin American Symposium on Circuits and Systems, LASCAS 2015 - Conference Proceedings
EditorsAlfredo Arnaud, Fernando Silveira, Lorena Garcia
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479983322
DOIs
StatePublished - 9 Sep 2015
Event6th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2015 - Montevideo, Uruguay
Duration: 24 Feb 201527 Feb 2015

Publication series

Name2015 IEEE 6th Latin American Symposium on Circuits and Systems, LASCAS 2015 - Conference Proceedings

Conference

Conference6th IEEE Latin American Symposium on Circuits and Systems, LASCAS 2015
Country/TerritoryUruguay
CityMontevideo
Period24/02/1527/02/15

Keywords

  • Folded Cascode
  • Fully Differential
  • Low Noise
  • Neural Amplifier
  • Recycling

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