Patent ID: 7501877
Filing Date: 2009-03-10
Classification: H03K,H03M

Abstract:
1. A single flux quantum modulator circuit comprising: a pair of junctions constituted of two Josephson junctions connected in series, wherein one end of one of the two Josephson junctions is grounded; a first inductor, one end of which is connected to a junction point between the Josephson junctions constituting the pair of junctions; a Josephson junction that is connected to the other end of the first inductor, one end of the Josephson junction being grounded; and a second inductor that is magnetically coupled to the first inductor, wherein: an analog input current is applied to the second inductor; a first single flux quantum clock signal is inputted into the other end of the pair of junctions; a second single flux quantum clock signal whose period is longer than that of the first single flux quantum clock signal is inputted into a junction point between the first inductor and the Josephson junction; and a voltage signal at the junction point between the Josephson junctions constituting the pair of junctions is output as a single flux quantum pulse.