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Transfer function with noise? 
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#1
Oct2807, 04:22 AM

P: 6

Hi,
Is it possible to calculate the gain of a closed loop system with Noise? Here's a diagram describing what i mean: http://img206.imageshack.us/img206/8955/cltfmh8.png I've got the following so far: [tex]Vout = \frac{A1A2Vin}{1 + A1A2B} + [/tex] [tex]\frac{AVn}{1 + A1A2B} [/tex] But the question is asking for the closed loop gain. Would that just be: [tex]Vout / Vin = \frac{A1A2}{1 + A1A2B} +[/tex] [tex]\frac{AVn}{Vin(1 + A1A2B)} [/tex] Thanks. 


#2
Oct2807, 03:45 PM

P: 2,251




#3
Oct2907, 07:58 AM

P: 6

What if i do this:
[tex]A' = A2 (A1 + Vn) [/tex] and then... [tex]Vout / Vin = \frac{A'}{1 + A'B}[/tex] Is this logically correct? 


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