Negative Resistance, High Frequency Device
Original Publication Date: 1984-May-01
Included in the Prior Art Database: 2005-Feb-03
A negative resistance, high frequency device employs a transit time based negative resistance based on thermionic injection or diffusion followed by drift across a high field. The thermionic injection over a barrier is controllable by changing the barrier height with a control voltage. The device thus has three terminals with a controllable barrier. The n region thickness is chosen to provide the optimal transit time delay to cause oscillations at a given frequency due to negative resistance. Two schematic structures illustrative of the principle are shown in Figs. 1 and 2. The dimension t is chosen so that under zero gate or control voltage, the region between gate segments is essentially depleted of carriers.