Examine the feedback loop in Fig XXXXXXXXXXA noise source, v n , is injected in the system between two amplifier stages, (a) Determine an expression for v o which includes both the noise and the input...

Examine the feedback loop in Fig. 31.54. A noise source, v
_n, is injected in the system between two amplifier stages, (a) Determine an expression for v
_o
which includes both the noise and the input signal, v_s. (b) Repeat (a) for the case where there is no feedback (ß = 0). (c) If A₁
= A₂
= 200, and feedback is again applied around the circuit, what value of ß will be required to reduce the noise by one-half as compared to the case stated in (b)?