Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I dont think thats the problem. I have temporarily solved it aplying a offset potential on the reference electrode with a pot, but with this I cant use right leg drive (ref must be connected to ground)
Hello again. The IC was faulty, I replaced it with a new one and it worked...
But now, today, it has stopped working, wherever I connect it to my 2 electrodes on my body it SATURATES to +8V or -8V. When i connect them altogether it behaves as expected (0.3V) and connecting it to a potentiometer...
Hi, thanks for your reply. Tought about that, and I already connected a 10uf cap for both power rails and 0.1uf capacitors near the voltage inputs of the IC's in the circuits. The results are the same.
Do you have any definite test that can confirm me this is a faulty IC? This is the complete...
Hello, that might be possible. i attach a picture below of how I have it connected, I think the trimpot is fine. V+ and V- on either side with out on centre, tuning it goes smoothly from -9V to +9V
Then, connecting it to the LM324 on a voltage follower produces the anticipated +-7,2V smooth...
Hi, thanks for the answer. I did that and indeed it works as a unity gain amplifier, +8.2 volts that i guess are the saturation for the amp (the seame as if I turn off the V- voltage supply). Weirdly enough, i don't get any effect varying the voltage on the in - input using the potentiometer...
Hello edaboard, I'm new here and I'm sorry my first post has to be a question, but I am really desperate with this one.
I've been working on a EKG amplifier using the AD624. You have the pin connection and schematics for a gain = 1000, extracted from the datasheet below.
The big problem is...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
