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My Master Thesis: Multi-Eletrodo-Array Amplifier

Francisco Fambrini
Prodigy 30 points
Other Parts Discussed in Thread: INA333, INA128, INA111

Good morning friends,

My name´s Francisco Fambrini, an I am a brazilian electronic engineer.

I am a Master student and my thesis include buildind an MEA (Multi Eletrodo Array) amplifier like this paper:

http://www.multichannelsystems.com/products/amplifiers

I need to amplify the neuronios electrical acitivities...

I am intend to use INA 333 Texas Op Amp...

My especifications:

Gain: 1200
- Bandwidth: 1 Hz – 3 kHz (Other specifications on request)

datasheet of similar comercial product:

http://www.multichannelsystems.com/sites/multichannelsystems.com/files/documents/data_sheets/MEA1060.pdf

Does Texas have  any sugestions for this project ?

  • 0
    TI__Mastermind 25825 points

    Hello Francisco,

    Can you please elaborate on the 'electrical activities'?  In other words, what type of signals are you trying to monitor (e.g. are they EEG/ECG)?  I was unable to understand this from the website below.  Are these single-ended or differential signals?  Also, what is the source impedance? 

    The INA333 will not work for the given gain and bandwidth.  When G=1000V/V the bandwidth is typically 350Hz, whereas you need 3.5kHz. Other INAs such as the INA111 or INA128 may be more applicable.

     

     

  • 0 in reply to Pete%20Semig
    Prodigy 30 points

    Hi  Dr.  Semig !   Nice talk to you !

    Well,I intend to amplify  Multi-EleCtrode Arrays (MEA) electrical signals.

    See:    http://en.wikipedia.org/wiki/Multielectrode_array

    I have to get the noise levels down to less than 5 microvolts (input referred)   (is not trivial, I know that).

    More about MEA and signals:

    http://www.plexon.com/product/MEA_Workstation.html

    The amplifier that i want to build is similar them:   http://www.multichannelsystems.com/products/mea1060-inv

    http://camelot.mssm.edu/~ygyu/instruments.html

    http://www.med64.com/

  • 0 in reply to Francisco Fambrini
    TI__Mastermind 25825 points

    Hello Francisco,

    While I understand in general what you're trying to do, please understand that our expertise is primarly with the devices.  We frequently get requests for help with applications for which we have little or no existing expertise.  Therefore we have to rely on you to provide answers to our questions for your expertise is with the application.  So, can you please re-visit my previous questions?