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Noise calculation in charge sensitive amplify circuit

Question asked by MC18 on Nov 26, 2010

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I listened the  Webcast: Amplifier Noise Principles for the Practical Engineer on analog website. I want to know how to calculate the noise of above charge sensitive amplify circuit. I use the AD8011 to substitute the OPA627.

1. how to model the 2N4416 within the circuit? As a part of OP or as a component ?

2. if the op is not JEFT input, how to calculate the current noise? 

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