Microwave oscillations in p-n-p and metal-n-p BARITT diodes

Studies have been made on the current transport and microwave oscillations of reach-through p-n-p and Pt-n-p devices, and their complementary structures operated as BARITT diodes (Barrier Injection Transit Time diodes) From dc current-voltage analysis, it is established that when the applied voltage is greater than the reach-through voltage, the current increases exponentially with voltage by a thermionic injection mechanism. When the injected carrier density becomes comparable or larger than the ionized impurity density, the space-charge-limited effect causes the current to vary linearly with the applied voltage.