Isolation amplifier

Hi
Can somebody give me some Isolation amplfier cricuit to isolate the patient in designing bio amplifiers.

This is regarding decoupling capacitors: Can I use 1uF electrolytic capacitor for supply voltage of +/-17V. I am seeing some recsonance signals with out capacitors.

thanks

Are you trying to isolate a human from soem high voltage thing?

Optocoupler is the solution. But it does not respond very fast. You way use it with frequencies of not more than a few kHz.

kent said:

Hi
Can somebody give me some Isolation amplfier cricuit to isolate the patient in designing bio amplifiers.

This is regarding decoupling capacitors: Can I use 1uF electrolytic capacitor for supply voltage of +/-17V. I am seeing some recsonance signals with out capacitors.

thanks

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When you say resonance, are you sure this is what you mean? If you mean oscillation that is not the same thing as resonance.

Can you post as schematic and describe what is oscillating? it is could be a loop oscillation problem with your amplifier if you have feedback. This can also show up in the power supplies. Your layout has lot to do with it as well.