Fujitsu Corporation

International Superconductivity Technology Center, the Juridical Foundation

Satoru Hirano

Akira Yoshida

Keiichi Tanabe

Hideo Suzuki

Tsunehiro Hato

Michitaka Maruyama

Sinya Hasuo

A circuit includes a latch circuit including a Josephson junction and configured to perform a latch operation based on a hysteresis characteristic in response to a single flux quantum, a load circuit including load inductance and load resistance and coupled to an output of the latch circuit, and a reset circuit provided between the output of the latch circuit and the load circuit and configured to reset the latch circuit a predetermined time after the latch operation by the latch circuit, wherein the Josephson junction is driven by a direct current.

Superconducting latch driver circuit generating sufficient output voltage and pulse-width

There is provided a superconducting multi-stage sigma-delta modulator including a first superconducting sigma-delta modulator having a first integrator and a first comparator and outputting a sigma-delta modulated signal and a second superconducting sigma-delta modulator having a second integrator and a second comparator and outputting a sigma-delta modulated signal. The first integrator and the second integrator are magnetically coupled.

Superconducting multi-stage sigma-delta modulator

Growing community of inventors

Edogawa, Japan

Satoru Hirano