Analytical nonlinear study on read diode avalanche region

An exact solution of the equation describing the dynamics of the current generation in the avalanche region of the Read diode is presented. The avalanche current is composed of a transient component and a steady-state component. For ac diode excitation the latter one contains a large number of harmonics. A brief study, in which the space-charge effect is neglected, illustrates the usefulness of the presented solution. A threshold frequency is defined which characterizes the avalanche current transients and specifies the range of validity of the resuits obtained by commonly used simplified approaches.