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相关概念视频

Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

711
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
711

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相关实验视频

Updated: Jun 7, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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单流量量子倍增器电路用于以量子为基础的精度合成千兆赫兹波形.

Manuel A Castellanos-Beltran1, D I Olaya2, A J Sirois1

  • 1National Institute of Standards and Technology, Boulder, CO 80305 USA.

IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee
|November 14, 2024
PubMed
概括
此摘要是机器生成的。

研究人员使用单流量量子 (SFQ) 电路和超导量子干扰装置 (SQUID) 放大器开发了微波频率数字-模拟转换器组件,用于精确的波形生成. 这些进步使得通信计量学中的量子准确性成为可能.

关键词:
数字-模拟转换 (DAC) 是指数字-模拟转换.约瑟夫森交叉点 (JJs) 的时间信号合成信号合成超导装置是一种超导装置.超导集成电路的超导集成电路.

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科学领域:

  • 超导电子产品的超导电子
  • 量子计量学的量子计量学
  • 微波工程 微波工程 微波工程

背景情况:

  • 高频波形的精确合成对于通信计量学至关重要.
  • 现有的方法在精度和校准方面存在局限性.
  • 量子现象为提高准确性和可重现性提供了一条道路.

研究的目的:

  • 设计,模拟和实验证明自校准可编程波形参考的关键组件.
  • 开发使用单流量量子 (SFQ) 电路的微波频率数字对模拟转换器 (DAC).
  • 创建一个基于超导量子干扰装置 (SQUID) 的放大器,用于量子精确的信号合成.

主要方法:

  • 使用Nb/NbxSi(1-x) /NbJosephson-junction (JJ) 工艺制造SFQ和SQUID电路,并使用自流式JJs.
  • 设计和模拟SFQ电压乘数电路,包括SFQ分离器和SQUID变压器.
  • 实验合成和表征单调和多调的千兆赫兹波形在4K.

主要成果:

  • 成功展示了基于SFQ的DAC和基于SQUID的放大器组件.
  • 来自SFQ电压乘数器的量化脉冲输出信号.
  • 稳定和可重复的合成千兆赫兹波形在4K跨各种操作参数.

结论:

  • 开发的SFQ和SQUID组件可用于基于量子的可编程波形参考.
  • 制造过程产生了高性能超导装置.
  • 拟议的电路设计为更高的合成频率和更好的输出特性提供了途径.