IMPROVED DC-EST STRUCTURE WITH DIODE DIVERTOR

A novel emitter switched thyristor (EST) structure with a diode divert er is introduced to obtain superior current saturation characteristics with an excellent forward bias safe operating area, without compromis ing the on-state voltage drop. The new structure consists of a diode d iverter connected to the p-base region of the DC-EST. The saturation c urrent density is lowered significantly, which is desirable to achieve a good saturation current safe operating area. Experimental results a re reported to confirm the superior characteristics observed through s imulations.