Superconducting interface circuit

Abstract

The invention belongs to the technical field of superconducting integrated circuits, and particularly relates to a superconducting interface circuit. The superconducting interface circuit comprises a front-stage amplification circuit 4 Josephson latch which is used as an input detection circuit and is used for detecting microampere-level output current of a superconducting digital integrated circuit; and the Suzuki stack is used as a subsequent amplifier, receives the driving current generated by the 4JL, and generates dozens of millivolts of output voltage to drive a subsequent semiconductor integrated circuit under the action of alternating current bias. According to the superconducting interface circuit, the magnitude and proportion of the critical current of the Josephson junction of the pre-stage amplification circuit 4JL are adjusted, so that the superconducting interface circuit can detect about dozens of microamperes of input current, and the detection precision of the superconducting interface circuit is ensured; in addition, a method of connecting Josephson junctions in series is adopted, and backflow after the superconducting interface circuit is triggered is reduced. The superconducting interface circuit can be independently packaged, and the flexibility and the application prospect of the interface circuit in a superconducting circuit are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of superconducting integrated circuits, and in particular relates to a superconducting interface circuit. Background technique [0002] The development of the semiconductor industry, which traditionally uses silicon as its raw material, is getting closer and closer to the physical size limit. Therefore, the task of finding semiconductor materials or other materials that can replace silicon materials is imminent. In terms of semiconductor materials, there are materials such as gallium nitride, gallium arsenide and silicon carbide, and these semiconductor materials have unique advantages. While searching for semiconductor materials, the whole world is also trying its best to find other materials, and superconducting materials are one of them. [0003] Superconducting materials have many characteristics such as zero resistance and diamagnetism, and superconducting integrated circuits composed of superconducti...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the lack of flexibility in the system construction between the current superconducting circuit and the traditional CMOS circuit, the present invention provides a superconducting interface circuit, which compromises the area and working performance of the superconducting interface circuit, and realizes Independent Packaging of Superconducting Integrated Circuit and Superconducting Amplifying Circuit

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