need help to amplify microvolt AC.

Hi. I am student doing some research work , I am stuck in something. I want to convert microvolt AC that i get from some sensor , i want to amplify it upto 5V DC so i can make relation with input and gain.

i tried many circuit and modules but microvolt is very less for them to work. so i need help if anyone give any suggestion.

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dougw over 4 years ago +2

What frequency is the signal? You will need a very low noise amplifier, probably more than one stage.
michaelkellett over 4 years ago +2

More information is needed. What kind of sensor, what frequency range of signals ? shabaz posted what might be a helpful article: Building a Measurement Amplifier MK
gordonmx over 4 years ago +2

I would be more interested in what issue(s) Ahmed has seen. If it is electrical noise pickup the input impedance may be too high or he may have to put a metal can around the circuit. If noise is being…

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dougw over 4 years ago

What frequency is the signal?
You will need a very low noise amplifier, probably more than one stage.
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salman34 over 4 years ago in reply to dougw

any suggestion of ac micro volt amplification ic.?
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dougw over 4 years ago in reply to salman34

OP27 is about the lowest noise op-amp I have used.
I have used them to amplify 1 microvolt signals.
You need to be very careful with all aspects of your design to keep noise in the signal below 1 microvolt. Especially the power supply.
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dougw over 4 years ago in reply to salman34

OP27 is about the lowest noise op-amp I have used.
I have used them to amplify 1 microvolt signals.
You need to be very careful with all aspects of your design to keep noise in the signal below 1 microvolt. Especially the power supply.
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