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.
if the question is well posed, it needs to still specify the gain (closed loop or not) from some specified input to a specified output. your first equation (i prettied it up a little) actually shows two different transfer functions.
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?