This Letter presents a novel and extremely compact circuit topology able to implement a generalized threshold logic function with two thresholds. The circuit consists of resonant tunnelling diodes (RTDs) and heterostructure field effect transistors (HFETs). Introduction: Resonant tunneling devices are nowadays considered the most mature type of quantum-effect devices. They are already operating...

An analysis of harmonic contents of the optical output power for a laser diode is performed, and the results are described in details. The influence of external parameters such as modulation current, bias current, and frequency on the absolute value of power for each harmonic are fully described. The analysis is done by direct solution of rate equations of an arbitrary laser diode for carrier a...

Shot noise suppression in double barrier resonant tunnelling diodes with a Fano factor well below the value of 0.5 is theoretically predicted. This giant suppression is found to be a signature of the coherent transport regime and can occur near zero temperature as a consequence of the Pauli principle or above about 77 K as a consequence of long range Coulomb interaction. These predictions are v...