how can i get open loop gain >70db

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manjulasd

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hello,
i need two stage opamp schematic and test bench for open loop gain>70db
iam not open loop gain >than 70db
i have implemented the opamp in BIQUAD GIC NOTCH FILTER .
please help
........
 

Please provide more info on your application to get useful feedback.
 

usually you can get around 80 dB for a two stage. maximize length where possible. otherwise, use cascode stages.
 

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