A Multi Channel Chopper Modulated Neural Recording System

Abstract

Presented herein is a fully integrated low-noise CMOS multi-channel amplifier for neural recording applications The circuit employs the chopper modulation technique to reduce the effect of flicker noise and DC offset, A reduced area design implementation is achieved by trading off the increased noise margin performance of the chopper modulator for minimal amplifier area and analog multiplexing of the recording sites, A fully differential topology is used for the signal path to improve noise immunity The analog amplifier exhibits 56 dB of gain with a 115 kHz bandwidth and a common mode rejection ratio (CMRR) of 80 dB. Simulation results show a total input referred noise less than 16 nV/square root of Hz, The system power consumption is approximately 750 microWatts The fully integrated system was designed in ABN 1,6-um single poly n-well CMOS process

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA410337

Entities

People

  • Mustafa Dagtekin
  • Rizwan Bashirullah
  • Wentai Liu

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Amplification
  • Amplifiers
  • Analog Signals
  • Bandwidth
  • Discrete Fourier Transforms
  • Engineering
  • Field Effect Transistors
  • Filters
  • Frequency
  • Low Pass Filters
  • Modulators
  • North Carolina
  • Recording Systems
  • Residuals
  • Signal Processing
  • Simulations
  • Transistors

Readers

  • Electrical Engineering
  • Image Processing and Computer Vision.
  • Integrated Circuit Design and Technology.