STABILIZED FEEDBACK AMPLIFIERS 

 To get the absolute value of the amplification: Let 



ixfi = l/x/31 I*, 



\Af\ I/^I 



VI - 2|mi3| cos* + |/xj8|2 



The stability of amplification which is proportional to the 

 stability is given by: 



\Af\ 

 b\AF\ 



\Af\ 

 5Uf| 



(9) 

 (10) 



gain 



(11) 

 (12) 

 (13) 



Fig. 3 — The vector field of ///i. See caption for Fig. 4. 



