A quasi-stationary treatment of the turn-on delay phase of one-dimensional thyristors: Part I—Theory

A qualitative discussion of the turn-on delay phase of one-dimensional thyristors is given, taking into account the effect of the charge of the free carriers on the width of the space-charge region. It is shown that in a resistive load circuit the slope of the load current rise goes to infinity for finite values of a critical current density. Along a simple quasi-stationary model the influence of varying voltage, n-base doping, n-base width, and gate current on the load current rise and on the critical current density is discussed quantitatively.