Resonance tunnel diode
The resonance tunnel diode technology uses so-called resonance tunnel diodes or interband tunnel diodes. Such a diode has two tunnel barriers a few nanometers thick. Electrons have to tunnel through these barriers for an electric current . The probability of this depends on the level of the quantized energy state between the tunnel barriers. This is what makes the tunnel diodes special. They have a negative differential resistance . Both logic elements and memories can be realized on the basis of tunnel diodes .