216 BELL SYSTEM TECHNICAL JOURNAL 



A Variation on the Gain Fcrmula for Feedback Amlifters for a Certain 

 Driving-Impedance Configuration.^^ T. W. Winternitz. An expression 

 for the gain of a feedback amplifier, in which the source impedance is the 

 only significant impedance across which the feedback voltage is developed, 

 is derived. As examples of the use of this expression, it is then applied to 

 three common circuits in order to obtain their response to a Heaviside 

 unit step-voltage input. 



" Proc. LR.E., September 1946. 



