A Variation on the Gain Formula for Feedback Amplifiers for a Certain Driving-Impedance Configuration
T.W. Winternitz · Proceedings of the IRE · 1946
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.