Superconducting quantum digital-to-analog conversion circuit and quantum voltage noise source device

A digital-to-analog conversion circuit, superconducting quantum technology, applied in analog/digital conversion, electrical components, code conversion, etc., can solve problems such as common-mode voltage error

Active Publication Date: 2020-08-21
NAT INST OF METROLOGY CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on this, it is necessary to provide a superconducting quantum digital-to-analog conversion circuit and a quantum voltage noi

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  • Superconducting quantum digital-to-analog conversion circuit and quantum voltage noise source device
  • Superconducting quantum digital-to-analog conversion circuit and quantum voltage noise source device
  • Superconducting quantum digital-to-analog conversion circuit and quantum voltage noise source device

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0032]The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom",...

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Abstract

The invention provides a superconducting quantum digital-to-analog conversion circuit and a quantum voltage noise source device. A first high-speed pulse signal and a second high-speed pulse signal are transmitted to a tail end along the respective corresponding microwave transmission line structures and are combined when being transmitted to a combining module. The first high-speed pulse signal and the second high-speed pulse signal which are equal in amplitude and opposite in polarity offset each other and then are absorbed by a terminal resistance module, and a common-mode voltage error problem of a traditional superconducting quantum digital-to-analog conversion circuit can be solved. Therefore, the used high-speed digital signal does not need to adopt an encoding mode with lower efficiency in order to avoid a common-mode voltage error problem. Therefore, through the superconducting quantum digital-to-analog conversion circuit, the common-mode voltage problem is solved, an arbitrary waveform synthesis system is simple, and the maximum synthesizable signal amplitude can be maintained.

Description

technical field [0001] The application relates to the technical field of integrated superconducting Josephson junction circuit design, in particular to a superconducting quantum digital-to-analog conversion circuit and a quantum voltage noise source device. Background technique [0002] Based on the AC Josephson effect, a series of high-speed current pulse sequences are used to drive the Josephson junction array. When the amplitude of a single current pulse is within the quantum voltage step, the Josephson junction array will generate a corresponding time integral after being driven. The quantum voltage pulse whose area is always equal to h / 2e. This feature makes the Josephson junction a quantum pulse modulator, which can be used to quantize and filter the digital sequence with amplitude and phase jitter generated by a commercial digital signal generator, and generate a theoretically completely accurate quantized output digital sequence . On the other hand, the Josephson e...

Claims

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Application Information

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IPC IPC(8): H03M1/86H03M1/06
CPCH03M1/0626H03M1/86
Inventor 钟源李劲劲钟青王雪深曹文会屈继峰周琨荔
Owner NAT INST OF METROLOGY CHINA
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