a josephson pulse generator of the current injection type is composed of a first group of n resistors , one end of each being connected together , the other ends of two of the n resistors being connected to first and second nodes . a second group of serially connected n - 1 resistors is connected between the first and second nodes and to the other ends of the n - 2 resistors in the first group not connected to the first and second nodes . n josephson junctions are each connected between a reference potential and the other end of a different one of the n resistors . two additional josephson junctions , each having one end thereof connected , respectively , to the first node and the second node is provided along with an additional resistor connected between the other end of the josephson junction connected to the first node and the reference potential .