1
\$\begingroup\$

For my project, I need to design a simple EEG circuit. As known, input signals are in micro volts.

After some research I understand that I should use an inst. Amp. to process the signal. Voltage gain should be 100.

The question is how I can choose the appropriate ins. amp ? Any help or guide will be appreciated.

Sincerely.

\$\endgroup\$
  • \$\begingroup\$ Usual voltage gain is more like 1:100,000 - if you can block the DC offset somehow. \$\endgroup\$ – Turbo J Sep 1 '17 at 22:42
  • \$\begingroup\$ Is there any source that we can see what component are okay for our specific purposes ? \$\endgroup\$ – PIC16F84A Sep 2 '17 at 13:25
1
\$\begingroup\$

I would redirect you to consider the ADS1298 which has the Right leg drive (RLD)and everything else you need for ADC.

http://www.ti.com/lit/sg/slyt416/slyt416.pdf

The ADS1294/6/8 are a family of multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference and onboard oscillator. The ADS1294/6/8 incorporate all of the features that are commonly required in medical electrocardiogram (ECG) and electroencephalogram (EEG) applications

\$\endgroup\$
  • 1
    \$\begingroup\$ TI has the ADS1299 specific for EEG applications. ADS1298 has noise in one of the EEG bands - at least on our test bed. \$\endgroup\$ – Turbo J Sep 1 '17 at 22:40
  • 1
    \$\begingroup\$ oh? which band? \$\endgroup\$ – Tony Stewart Sunnyskyguy EE75 Sep 1 '17 at 22:55

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.