Resistive superconductive asynchronous bilinear logic AND gate circuit

A two-wire logic, resistive technology, applied in the direction of logic circuits with logic functions, etc., can solve the problems of too many junctions and difficult wiring, and achieve the effect of small time delay and simple and convenient wiring.

Inactive Publication Date: 2010-01-13
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, for the existing Josephson junction superconducting circuit manufact

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  • Resistive superconductive asynchronous bilinear logic AND gate circuit
  • Resistive superconductive asynchronous bilinear logic AND gate circuit

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Such as figure 2 As shown, one end of the first connection inductance L1 is the first input end A1, the other end of the first connection inductance L1 and one end of the second connection inductance L2 are connected to one end of the first Josephson junction J1, and the first Josephson junction J1 The other end of the second connection inductor L2 and one end of the third connection inductor L3 are connected to the output end of the first current source I1, and the ground end of the first current source I1 is grounded; the other end of the third connection inductor L3 1. One end of the first magnetic flux preservation inductance L18 is connected to one end of the second Josephson junction J2, and the other end of the second Josephson junction J2 is grounded; the other end of the first magnetic flux preservation inductance L18 is connected to the third Josephso...

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Abstract

The invention relates to a resistive superconductive asynchronous bilinear logic AND gate circuit. A logic gate structure of the prior superconductive asynchronous bilinear circuit has the defects of great amount of used Josephson junctions and difficult wiring. The resistive superconductive asynchronous bilinear logic AND gate circuit comprises four Josephson quantum interference devices and a choking resistor, the first Josephson quantum interference device or the second Josephson quantum interference device comprises four Josephson junctions and two connecting inductors; and the third Josephson quantum interference device or the fourth Josephson quantum interference device comprises three Josephson junctions and a connecting inductor. The logic AND gate circuit proposed by the invention utilizes resistors to consume a loop current remained in the gate circuit after the logic gate is triggered so as to greatly reduce the number of the needed Josephson junctions. The invention is favorably compatible to the wiring convenience. Compared with the prior art, circuittopology in a sequential structure is easier to apply to a large-scale superconductive integrated circuit.

Description

technical field [0001] The invention belongs to the technical field of superconducting digital circuits, and relates to a resistive asynchronous dual-rail (Dual-Rail) logic AND gate circuit structure used in a superconducting RSFQ (rapid single flux quantum) digital integrated circuit. Background technique [0002] In 1985, K.K.Likharev, O.A.Mukhanov and V.K.Semenov proposed a logic circuit technology based on Josephson junction, that is, superconducting fast single flux quantum (Rapid Single Flux Quantum) technology. [0003] A Josephson junction consists of a weak link (usually a tunnel junction) between two superconductors. The junction can switch between superconducting and normal states on the order of picoseconds. A voltage pulse with a single flux quantum is generated across the junction during the switching process. Fast single magnetic flux quantum digital circuit technology is to use single magnetic flux quantum voltage pulse to represent digital information. ...

Claims

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Application Information

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IPC IPC(8): H03K19/20
Inventor 官伯然王磊方志华吴爱婷张忠海
Owner HANGZHOU DIANZI UNIV
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