Sec. 7.3] OPTIMUM PERFORMANCE OF CONVENTIONAL TUBE 67 

 matrix is 



E = 



B:] 



with 

 and 



fE^P = UTo A/ {Rr, + Ri),,' 



£i 2 = ^kToAfRi 



E1E2* = -4:kToAffxRi 



The impedance matrix is 



Ri 

 -tJ^Ri 



(7.30) 



(7.31a) 



(7.31&) 

 (7.3k) 



(7.32) 



In order to make the impedance matrix of the triode represent the 

 normalized form (Fig. 7.1a), suitable ideal transformers have to be 

 connected to the input and output. The new impedance matrix then 

 becomes 



1 0' 



Z' = 



-/? « 



(7.33) 



and the new open-circuit noise voltages of the over-all network are 



El 



E' 



'Ri 



E2 



L_ " 'P_l 



(7.34) 



Finally, in general-circuit-parameter form, the parameters of the triode 

 become 



where 



Also 



T = - 



w = t/i 



2u\\ ij 



8 = 



2w 



Eo 2uEi 

 + 



VRi 



Eo 



Enl 



(7.35) 



(7.36) 



