Structure and establishment method of Josephson junction circuit model and structure and establishment method of superconducting integrated circuit

A construction method and integrated circuit technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the inability to use nano-bridge Josephson junctions, the lack of nano-bridge Josephson junction circuit models, etc., to achieve The effect of improving circuit integration and solving design vacancies

Inactive Publication Date: 2018-02-16
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of Josephson junction circuit model and superconducting integrated circuit structure and establishment method, b...

Method used

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  • Structure and establishment method of Josephson junction circuit model and structure and establishment method of superconducting integrated circuit
  • Structure and establishment method of Josephson junction circuit model and structure and establishment method of superconducting integrated circuit
  • Structure and establishment method of Josephson junction circuit model and structure and establishment method of superconducting integrated circuit

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Experimental program
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Effect test

Embodiment 1

[0061] like figure 1 As shown, this embodiment provides a method for establishing a Josephson junction circuit model, and the establishment method includes:

[0062] S1: Define the junction type definition statement of the nano-bridge Josephson junction in the simulation software, and establish a primary circuit model according to the junction type definition statement;

[0063] S2: Test the primary circuit model in the simulation software to obtain a test curve of the primary circuit model;

[0064] S3: providing a superconducting device based on a nano-bridge Josephson junction, and obtaining a test curve of the superconducting device by testing the superconducting device;

[0065] S4: By comparing and fitting the test curve of the primary circuit model with the test curve of the superconducting device, and modifying the primary circuit model according to the comparison and fitting results, the circuit of the nano-bridge Josephson junction is obtained Model.

[0066] As a...

Embodiment 2

[0076] like Figure 4 As shown, this embodiment provides a superconducting integrated circuit design method, the establishment method includes:

[0077] S5: Utilize the circuit model of the nano-bridge Josephson junction as described in Embodiment 1 to build a circuit schematic diagram of a superconducting integrated circuit in the simulation software, and check the critical current value and circuit inductance value of the superconducting integrated circuit make settings;

[0078] S6: Use the circuit schematic diagram to simulate the waveform logic of the superconducting integrated circuit and the SFQ hardware description language verification logic respectively. If any simulation result is incorrect, skip to S5 and reset the superconducting integrated circuit. The critical current value of the circuit and the circuit inductance value;

[0079] S7: providing a single junction layout of the nano-bridge Josephson junction, and building a primary layout corresponding to the ci...

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Abstract

The invention provides a structure and an establishment method of a Josephson junction circuit model and a structure and an establishment method of a superconducting integrated circuit. The establishment method of the circuit model includes: defining a junction type definition statement of a nano-bridge Josephson junction in simulation software, and establishing a primary circuit model according to the junction type definition statement; testing the primary circuit model to obtain corresponding testing curves; providing a superconducting device based on the nano-bridge Josephson junction, andobtaining corresponding testing curves through testing the same; and then obtaining the circuit model through comparing and fitting the obtained testing curves and modifying the primary circuit modelaccording to comparison and fitting results. Through the structures and the establishment methods of the invention, problems that the nano-bridge Josephson junction circuit model does not exist in existing simulation software, and the nano-bridge Josephson junction cannot be used to realize design of the superconducting integrated circuit are solved.

Description

technical field [0001] The invention belongs to the design field of superconducting integrated circuits, in particular to a Josephson junction circuit model, superconducting integrated circuit structure and establishment method. Background technique [0002] According to the tunneling effect of quantum mechanics, if the insulating layer sandwiched between two metal layers is thin enough, current can flow from one metal layer through the insulating layer to the other metal layer. This MIM (metal-insulator-metal) stack structure is called a tunnel junction; in this stack structure, one or two metals are superconductors, it is called a superconducting tunnel junction; according to the Josephson effect, in In a superconducting tunnel junction, the insulating layer has some properties of a superconductor, but it has weaker superconductivity than conventional superconductors, and is called a "weakly connected superconductor". [0003] In addition to the weak connection of the com...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 任洁杨若婷李冠群应利良王镇
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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