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Amplifier Noise ENC amp = 115 e + 135 e x 1.5 ~ 315 e (1.5 pf max)

Amplifier Noise ENC amp = 115 e + 135 e x 1.5 ~ 315 e (1.5 pf max) ~ 230 e (0.8 pf min) Thermal Noise ENC Rbias = e/q √(t p Kt)/2R bias ~ 150 e (1.5MΩ) Shot Noise ENC leak = e/q √(t p q I leak )/4 ~ 3 e (15 pA measured)

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Amplifier Noise ENC amp = 115 e + 135 e x 1.5 ~ 315 e (1.5 pf max)

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  1. Amplifier Noise ENC amp = 115 e + 135 e x 1.5 ~ 315 e (1.5 pf max) ~ 230 e (0.8 pf min) Thermal Noise ENC Rbias = e/q √(tp Kt)/2Rbias ~ 150 e (1.5MΩ) Shot Noise ENC leak = e/q √(tp q Ileak)/4 ~ 3 e (15 pA measured) ~ 8 e (100 pA max spec) ENC total = √(ENC amp)2 + (ENC Rbias)2 + (ENC leak)2 ENC total = √(315)2 + (150)2 + (8)2 ~ 350 e (max)

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