公开(公告)号：US06486756B2

公开(公告)日：2002-11-26

申请号：US09816240

申请日：2001-03-26

申请人： Yoshinobu Tarutani ,  Kazuo Saitoh ,  Kazumasa Takagi ,  Yoshihisa Soutome ,  Tokuumi Fukazawa ,  Akira Tsukamoto

发明人： Yoshinobu Tarutani ,  Kazuo Saitoh ,  Kazumasa Takagi ,  Yoshihisa Soutome ,  Tokuumi Fukazawa ,  Akira Tsukamoto

IPC分类号： H03F1700

CPC分类号： H03K19/1952 ,  H01L27/18 ,  H03F19/00

摘要： A superconductor signal amplifier which receives an extremely small high-frequency signal having a frequency of tens of GHz generated in a superconductive circuit, amplifies the voltage of the high-frequency signal without a decrease in frequency, and outputs the thus amplified high-frequency signal from the superconductive circuit. At an output part of a single flux quantum circuit using a flux quantum as a binary information carrier, there are provided a superconductive junction line for flux quantum transmission and a splitter for simultaneously producing two flux quanta from a flux quantum. According to the number of plural series-connected SQUIDs, a plurality of flux quantum signals are generated and input to the plural series-connected SQUIDs so that the SQUIDs are simultaneously switched to a voltage state. In each SQUID pair comprising two SQUIDs, a part of an inductor is shared by the two SQUIDs for reduction in inductance, thereby increasing an output voltage of the series-connected SQUIDs. Furthermore, a magnetic shielding film formed under each SQUID is electrically isolated from ground to prevent a signal delay due to a parasitic capacitance.

摘要翻译： 接收在超导电路中产生的具有数十GHz频率的极小的高频信号的超导体信号放大器放大高频信号的电压而不降低频率，并输出这样放大的高频信号 从超导电路。 在使用磁通量子作为二进制信息载体的单个量子电路的输出部分，提供了用于磁通量子传输的超导结线和用于从磁通量子同时产生两个通量量子的分离器。 根据多个串联SQUID的数量，产生多个通量量子信号并将其输入到多个串联连接的SQUID，使得SQUID同时切换到电压状态。 在包含两个SQUID的每个SQUID对中，电感器的一部分由两个SQUID共享以减小电感，从而增加串联连接的SQUID的输出电压。 此外，形成在每个SQUID下方的磁屏蔽膜与地电隔离以防止由寄生电容引起的信号延迟。