farshchian
Junior Member level 1
How I can amplify a micro volts range to volt range?
Which type of op-map i must use?I have very low signal about 1 micro volt and i want to amplify it to about 1 Volts and measure it's frequency it's frequency is in audio range and almost is about about 1-3 KHZ,I use two stage of AD620 IC WITH rg=50 OHM each stage gain is about 1000 so i increase gain 1000000 but the OUTPUT is very noisy when i see it in o-scope how can i solve this problem?
i know there is some Op-map LNA (low noise amplifier) but i haven't them could i use simple type for detecting this signal?what is chopper method in reducing offset voltage in op-amp?
thanks to your help
Which type of op-map i must use?I have very low signal about 1 micro volt and i want to amplify it to about 1 Volts and measure it's frequency it's frequency is in audio range and almost is about about 1-3 KHZ,I use two stage of AD620 IC WITH rg=50 OHM each stage gain is about 1000 so i increase gain 1000000 but the OUTPUT is very noisy when i see it in o-scope how can i solve this problem?
i know there is some Op-map LNA (low noise amplifier) but i haven't them could i use simple type for detecting this signal?what is chopper method in reducing offset voltage in op-amp?
thanks to your help
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