3.69 GHz single flux quantum pseudorandom bit sequence generator fabricated with Nb/AlO/sub x//Nb
3.69 GHz single flux quantum pseudorandom bit sequence generator fabricated with Nb/AlO/sub x//Nb
复制标题
用 Nb/Al2O/sub x//Nb 制造的 3.69 GHz 单通量量子伪随机比特序列发生器
DOI：
10.1109/77.621789
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发表时间：
1997
影响因子：
1.8
通讯作者：
James D McCambridge
中科院分区：
文献类型：
--
作者：
J.H. Kang;J. Przybysz;S. Martinet;A. Worsham;D.L. Miller;James D McCambridge
采用八电平Nb/AlO/sub x//Nb约瑟夫森结集成电路工艺，研制了4位15序列SFQ（Single Flux Quantum）伪随机位序列发生器。SFQ电路内置于代码发生器中，以实现快速重启。测试结果表明，该电路在3.69GHz的种子频率下工作正常。异或非门和移位寄存器在5 GHz时工作正常。然而，反向延迟长于200皮秒，并且发生器在该频率下用作5位21序列码发生器。在200 MHz下，代码发生器连续运行以观察其稳定性。在两个半小时的过程中，电路只发生了五次代码错误，表明误码率为3/spl乘以/10/sup-12/。在2 GHz时，我们在序列的第4023位上收集了1000万个样本。没有观察到错误的信号值，这表明在该频率下误码率小于5/spl times/10/sup-11/。
A 4 bit 15 sequence SFQ (Single Flux Quantum) pseudorandom bit sequence generator was built with an eight-level Nb/AlO/sub x//Nb Josephson junction integrated circuit process. An SFQ circuit was built into the code generator to enable a rapid restart. The test results showed that the circuit operated correctly at the seed of 3.69 GHz. The XNOR gate and shift register worked correctly at 5 GHz. However, the back delay was longer than 200 psec and the generator acted as a 5 bit 21 sequence code generator at this frequency. At 200 MHz, the code generator was operated continuously to observe its stability. Over the course of two and one half hours, the circuit made only five code errors, indicating a bit error rate of 3/spl times/10/sup -12/. At 2 GHz we collected 10 million samples on the 4023rd bit of the sequence. No wrong signal values were observed, indicating the bit error rate is less than 5/spl times/10/sup -11/ at this frequency.