A stable output can be obtained with respect to the input level fluctuations. Two impedance elements 1 and 2 each having a single-electron tunnel junction are connected in series. The tunnel resistances R.sub.1 and R.sub.2 and the junction capacitances C.sub.1 and C.sub.2 of the respective impedance...http://www.google.com/patents/US5646559?utm_source=gb-gplus-sharePatent US5646559 - Single-electron tunnelling logic device
