Two-port current injection interferometer amplifiers and logic circuits

Abstract From the Canadian patent

Abstract of the Disclosure Josephson junction interferometers having nonlinear switching or threshold characteristics are disclosed. The nonlinear threshold characteristic is achieved in a preferred manner by applying an injection current to the interferometer at a point on the interferometer which is different from where its gate current is normally applied. The resulting nonlinearity provides for high amplification. The nonlinear switching characteristic may also be achieved by applying an injection current to the same point on the interferometer where_the gate current is normally applied. However, a portion of the thus-applied injection current is electromagnetically coupled to the …