Superconducting amplifying circuit

Abstract

The invention relates to a superconducting amplifying circuit, and belongs to the field of superconducting integrated circuits. The superconducting amplification circuit comprises a Josephson transmission line (JTL) array which is used as a signal multiplication circuit and is used for receiving an input single flux quantum (SFQ) signal and sending a string of SFQ signals; the double flux quantum amplifier (DFQA) is used as a first-stage amplification circuit, receives a string of SFQ signals from the JTL array to generate a level signal, and is used for providing a driving current for a subsequent circuit; and the Josephson latch driver (JLD) is used as a second-stage amplification circuit, receives the driving current provided by the DFQA, and generates an output voltage of dozens of millivolts under the condition of bias so as to drive the semiconductor integrated circuit. According to the superconducting amplifying circuit, compromise in circuit performance and area is achieved, the amplifier is divided into two stages, the two stages of amplifiers can be packaged separately, and the flexibility of circuit application is improved.

Description

technical field [0001] The invention belongs to the field of superconducting integrated circuits, and in particular relates to a superconducting amplifying circuit. Background technique [0002] The traditional semiconductor manufacturing technology will be developed to the end, and Moore's Law is no longer applicable. The whole world is looking for new materials, new technologies to improve the performance of circuits. Superconducting integrated circuits have the characteristics of high speed, high performance and low power consumption, and are an important direction for the development of integrated circuits, but there are also many shortcomings. Superconducting circuit signal-single-flux-quantum (SFQ) signal is a very small pulse signal, which is difficult to drive commonly used circuits at room temperature, and superconducting memory is difficult to design and has a huge area, which is difficult to use as a superconducting Computer storage devices, so superconducting c...

AI Technical Summary

Problems solved by technology

The former is a very widely used superconducting device with very sensitive magnetic induction ability and can be easily driven by SFQ signal to work, but SQUID has a large area and low magnification; the latter has the advantages of small area and high magnification , but it is difficult to be driven by the SFQ signal to work in actual engineering applications, and the working range is relatively small. At the same time, the Suzuki Stack must be integrated with the superconducting circuit of the previous stage. Once the design is finalized, the output signal amplitude will be fixed, reducing the system build flexibility

Images