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Passive transmission line receiver with reduced interference

A technology of receivers and transmission lines, applied in the direction of transmission systems, electrical components, etc., can solve the problem of reducing power consumption of circuits

Pending Publication Date: 2021-08-31
SYNOPSYS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Despite the challenges of the described technology, one of the main benefits is the greatly reduced power consumption relative to semiconductor technology and digital logic circuits

Method used

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  • Passive transmission line receiver with reduced interference
  • Passive transmission line receiver with reduced interference
  • Passive transmission line receiver with reduced interference

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Embodiment Construction

[0025] Josephson junctions were found to be useful in digital logic circuits that rely on the quantum mechanical quantization of magnetic flux. Quantum mechanical quantization of magnetic flux results in the magnetic flux being quantized as it travels through holes or loops in the superconductor. One use of quantum-mechanical quantization of magnetic flux to achieve in logic circuits is known as single-flux quantum (SFQ) logic. Although SFQ logic itself has numerous variants, all such variants utilize flux storage and transfer, effected by pulses emitted by Josephson junctions that are typically shunted by resistors in the SFQ circuit. When a Josephson junction emits a voltage pulse, it induces a single quantum of magnetic flux into the connected inductor. This type of pulse is called a "SFQ pulse". Rapid SFQ (RSFQ) devices can achieve pulse widths as narrow as a few picoseconds.

[0026] Logic circuits can be generated in which a logic state propagates from one gate to ano...

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Abstract

The invention relates to a passive transmission line receiver with reduced interference. Improved electronic structures are disclosed for propagating logic states between superconducting digital logic gates using a three-junction interferometer in a receiver circuit to reduce reflected signals that would otherwise cause distortion of signals transmitted between the gates. Other improved electronic structures include a passive transmission line (PTL) with a previously avoided transmission line matching circuit system. The matching circuit system minimizes the generation and propagation of spurious pulses emitted by Josephson junctions used in the digital logic gates.

Description

[0001] Cross Reference to Related Applications - Priority Claims [0002] This application claims priority to U.S. Provisional Application No. 62 / 983,392, filed February 28, 2020, entitled "Interference-Reducing Passive Transmission Line Receiver," which The entirety of the case is incorporated herein by reference. [0003] government license [0004] This invention was made under W911NF-17-9-0001 awarded by a government supported Intelligence Advanced Research Projects Agency (IARPA) agency. The government has certain rights in this invention. technical field [0005] The present invention relates generally to electronic circuits and, more particularly, to Josephson junction circuits and transmission lines. Background technique [0006] Superconducting circuitry based on Josephson junctions is used to implement digital logic systems. A Josephson junction is generally a circuit element comprising, for example, two superconducting electrodes separated by a thin insulat...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04B1/16
CPCH04B1/10H04B1/163H03K17/92H03K19/1954G06N10/00H03K3/38H03K19/195H10N60/12G01R33/035
Inventor S·怀特利
Owner SYNOPSYS INC
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