RSFQ-based D/A converter for AC voltage standard
RSFQ-based D/A converter for AC voltage standard
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基于 RSFQ 的交流电压标准 D/A 转换器
DOI：
10.1109/77.783799
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发表时间：
1999
影响因子：
1.8
通讯作者：
S. Polonsky
中科院分区：
文献类型：
--
作者：
H. Sasaki;S. Kiryu;F. Hirayama;T. Kikuchi;M. Maezawa;A. Shoji;S. Polonsky
基于约瑟夫森效应的数模转换器是一种很有前途的电压标准，因为它们产生的电压阶跃具有极高的精度和稳定性。在本文中，我们描述了一个项目，以发展约瑟夫森D/A转换器设计的合成一个正弦波形的精度。D/A转换器基于RSFQ（快速单通量量子）逻辑电路，由一个倍频器（FM）、一个脉冲分配器（PD）和多个电压倍增器（VM）组成。对应于第n位数字码的每个VM电路将SFQ脉冲的数量乘以因子2/sup n/。通过使用PD电路选通从FM到VM的输入SFQ脉冲，获得可编程输出电压。合成正弦波的均方根值的测量中的不确定性的可能来源进行了讨论。
Digital to analog converters based on the Josephson effect are promising for voltage standards, because they produce voltage steps with ultimate precision and stability. In this paper, we describe a project to develop a Josephson D/A converter designed for synthesizing a sinusoidal waveform with metrological accuracy. The D/A converter is based on RSFQ (Rapid Single Flux Quantum) logic circuits, and consists of a frequency multiplier (FM), a pulse distributor (PD), and a number of voltage multipliers (VMs). Each VM circuit, corresponding to the n-th bit digital code, multiplies the number of SFQ pulses by a factor of 2/sup n/. By gating the input SFQ pulses from the FM to the VMs using the PD circuits, a programmable output voltage is obtained. Possible sources of uncertainties in the measurement of the rms value of the synthesized sine wave are discussed.