The biopotential amplifier

[Тапка]

There is the idea to make a biopotential amplifier - there's one thread of info,experience and ideas on this topic????

[Экко]

EEG?

[Тапка]

Well, not EEG and be as versatile amp for the study of biosignals.

[Тапка]

So I ordered 2 medical Chiptype amplifier AD8220 AD8627 and .

The scheme here - http://www.ekis.kiev.ua/UserFiles/Image ... 8_2008.pdf page 12 - removal of biopotentials from the electrodes of medical devices .

I think I have enough foolishness of Mazza and build multistage amplifiers which then does not work and the component values float ))) For the price of detalhe was released in apiece rubles ( 2 amp) .


Pull up comrades!!!!!!!

[Экко]

detalhe was released in apiece rubles

Expensive

and AD8220 AD8627

Yes, that's the problem with them, they are rare. And what are the conditions of the order on chipidea? Prepayment required?

I think enough foolishness of Mazza and build multistage amplifiers which then does not work and the component values are floating

if you do everything right, everything will work

Well, not EEG and be as versatile amp for the study of biosignals.

Universal amplifier nothing will, so for each type of signals, EEG, ECG, or anything else, you need a separate filter and calculation settings, otherwise you will see only the noise.

[Тапка]

For SUCH inexpensive detalhe IMHO , the order conditions: 100% prepayment delivery time 2 weeks ( cuz of the position in order),mail - p 150 shipping .

A total of 1,500 p )) well, there is still the chip capacitors and other rassypuha))

Filters for the amplifier there will be some

P. S Lying fellow 3 chip necessary - AD8627 2 pieces Tama and one AD8220)) persecutive))

[Андрей Патрушев]

universal amplifier nothing will, so for each type of signals, EEG, ECG, or anything else, you need a separate filter and calculation settings, otherwise you will see only the noise.

Well, why not?
For example, the complex Biopac-Student (for the study of physiology in schools) - is a universal amplifier (little box) with four universal inputs, and everything else is implemented in software and works very well (can be any serious "science" to do on it).

[Тапка]

That's the way - http://palpaladidactico.com.ar/catalogo ... 9_9610.pdf quality and all separately sold .Our prices on these units - from 40 thousand.....mad Fars ....

[Экко]

and everything else is implemented in software

Well, that's another thing, filtering, and the best

[Алексей Киктев]

For SUCH detalhe inexpensive IMHO , the order conditions: 100% prepayment delivery time 2 weeks ( cuz of the position in order),mail - p 150 shipping .

A total of 1,500 p )) well, there is still the chip capacitors and other rassypuha))

Filters for the amplifier there will be some

P. S Lying fellow 3 chip necessary - AD8627 2 pieces Tama and one AD8220)) persecutive))

Good day, please tell me, what denominations there "rassypuha"?

[Седой]

Good afternoon. Wanted to ask the author to tell more in detail about filters. What they are . Active, passive, degree and so on.

And even if he knows how to decipher and analyze EEG

What protection from the omnipresent 50 Hz and galvanic isolation.

The fact that in the distant 97-x I had to design the instrumentation amplifier on the basis of AD INA MIL standard price $ 280 per chip.
Unquestionably the technique is not in place and components are getting cheaper as the parameters improve, but the insulation resistance of the PCB no.
And interference more and more.
I hope you took into account all the factors.

resistance of insulation material on which are mounted such chips should be less than input at least 10 000 times.
fit this case 1 sulfur 2 sapphire 3 PTFE.

the noise in nakopleniem resistance SMD's fun too.

So that $ 40,000 for a working device very good price. Well, of course if this whole thing not for the sake of self-development and knowledge of the basics and pitfalls.

I wish you luck.

[Тапка]

Yes , everything is already passed, the company desires to build biosilicon - a lot of crap , easier to buy and not to stand still ,namely to explore . Bought - examine . EEG-SMT .

[Кренг]

So I ordered 2 medical Chiptype amplifier AD8220 AD8627 and .
....
Pull up comrades!!!!!!!

Why not

Let's stick to MCP3201-CI/P and I concocted the pattern with the ADC sends information to the computer, the computer will make simple program that displays in a chart the data and see what happens!!!

[ВладимирЖ]

So I ordered 2 medical Chiptype amplifier AD8220 AD8627 and .
....
Pull up comrades!!!!!!!

Why not

Let's stick to MCP3201-CI/P and I concocted the pattern with the ADC sends information to the computer, the computer will make simple program that displays in a chart the data and see what happens!!!

Here http://openeeg.sourceforge.net/ view, much has already been done.