An analysis of the dynamic behavior of switching circuits using avalanche transistors

The behavior of the basic switching circuit using avalanche transistors is solved analytically by suitably approximating the static I-V characteristic of the device. From the normalized expression of the output current pulse, a set of curves relating amplitude and width of the pulse to the transistor and circuit parameters is obtained. The conditions for bistability and maximum resolution are investigated giving the minimum resistance needed for monostable or astable operation. The analytical solution is compared with that numerically computed and with experimental results.