硬件木马电路检测技术及发展趋势

随着集成电路产业链的全球化,硬件木马电路（HTH）日益成为潜在的威胁．木马电路的隐蔽性、多样性和植入层次的丰富性给木马电路的检测造成了困难．现有HTH检测方法多数通过测量比较功耗、时延等侧信道信息的方式展开,这些方法都需要存在基准设计．通过比较现有不同层次检测方法的特性,提出了HTH检测领域的发展趋势：注重高层次设计的检测、不同检测方法的效果衡量以及容忍工艺误差和测试噪声等干扰因素的更准确检测技术．     

低功耗互补传输门绝热逻辑和时序电路的设计

研究了采用二相非交叠功率时钟的绝热触发器及时序电路的设计,介绍了采用二相无交叠功率时钟的互补传输门绝热逻辑（CPAL）电路,并分析了其工作原理．该电路利用nMOS管自举原理对负载进行全绝热驱动,从而减小了电路整体功耗,且CPAL能耗几乎与工作频率无关．提出了性能良好的低功耗绝热D、T和JK触发器,并与其他几种绝热触发器进行功耗比较．给出了绝热时序电路的一般设计方法,并作为实例采用应用绝热D触发器设计了十进制计数器．SPICE程序模拟表明：设计的电路具有正确的逻辑功能及低功耗的优点．     

一项从CAA到CAD的工作 ～正交优化法与SPICE相结合

电子电路的计算机辅助设计方法是促进电子技术发展的一种有效工具。本文介绍如何将行之有效的正交优化法与国际盛行的模拟电子电路的分析程序ＳＰＩＣＥ相结合，形成了ＡＣＯＤ软件，将ＣＡＡ扩展为ＣＡＤ。     

对史密斯-帕塞尔自由电子激光光栅的研究

为了研究史密斯-帕塞尔自由电子激光的输出频率和光栅槽深、光栅槽长、光栅槽宽的关系,对于基于矩形光栅的史密斯-帕塞尔自由电子激光利用粒子模拟软件进行模拟和理论分析。首先,利用粒子模拟软件模拟对于基于矩形光栅的史密斯-帕塞尔自由电子激光进行了研究,发现史密斯-帕塞尔自由电子激光的输出频率随光栅槽深、光栅槽长、光栅槽宽的增大而减少。接着,对史密斯-帕塞尔自由电子激光的光栅槽进行了理论分析,发现每个光栅槽都可以等效为一个LC谐振电路,并发现在史密斯-帕塞尔自由电子激光中存在两种辐射,一种是史密斯-帕塞尔辐射,另一种是LC振荡辐射。最后,对光栅槽的LC振荡辐射进行了估算,发现史密斯-帕塞尔自由电子激光输出频率的模拟值与光栅槽的LC振荡辐射估算值的数量级均为102 GHz,且变化规律上一致。据此推测决定史密斯-帕塞尔自由电子激光输出频率的应该是光栅槽,而不是谐振腔。     

Topological and Nontopological Edge States Induced by Qubit-Assisted Coupling Potentials

In the usual Su–Schrieffer–Heeger (SSH) chain, the topology of the energy spectrum is divided into two categories in different parameter regions. Here, the topological and nontopological edge states induced by qubit-assisted coupling potentials in circuit quantum electrodynamics (QED) lattice modeled as a SSH chain are studied. It is found that, when the coupling potential added on only one end of the system raises to a certain extent, the strong coupling potential will induce a new topologically nontrivial phase accompanied by the appearance of a nontopological edge state, and the novel phase transition leads to the inversion of odd–even effect directly. Furthermore, the topological phase transitions when two unbalanced coupling potentials are injected into both ends of the circuit QED lattice are studied, and it is found that the system exhibits three distinguishing phases with multiple flips of energy bands. These phases are significantly different from the previous phase induced via unilateral coupling potential due to the existence of a pair of nontopological edge states. The scheme provides a feasible and visible method to induce different topological and nontopological edge states through controlling the qubit-assisted coupling potentials in circuit QED lattice both in experiment and theory.     

Effect of Multiphoton Processes on Geometric Quantum Computation in Superconducting Circuit QED

We study the influence of multi-photon processes on the geometric quantum computation in the systems of superconducting qubits based on the displacement-like and the general squeezed operator methods. As an example, we focus on the question about how to implement a two-qubit geometric phase gate using superconducting circuit quantum electrodynamics with both single- and two-photon interaction between the qubits and the cavity modes. We find that the multiphoton processes are not only controllable but also improve the gating speed. The comparison with other physical systems and experimental feasibility are discussed in detail.     

耦合映象格子时空行为的电路仿真实验

设计以一维逻辑斯蒂离散电路作为元胞子电路的耦合格子时空电路系统,利用PSPICE仿真平台,观测到该电路系统存在的各种时空动力学行为.仿真实验结果与计算机数值计算结果一致.     

Quantization of Underdamped, Critically Damped, and Overdamped Electric Circuits with a Power Source

We have investigated the quantum mechanical effect of the underdamped, critically damped, and overdamped electric circuits with a power source. The charge of the underdamped circuit oscillates while those of the critically damped and overdamped ones don't. The wave function of the system of overdamped circuit represented parabolic cylinder function while underdamped circuit was represented by well-known Hermite polynomial. The eigenvalues of underdamped circuit is discrete while those of the critically damped and overdamped ones are given as continuously.     

二极管伏安特性曲线测试电路的改进

指出了文献中所给出的伏安法测二级管特性曲线电路存在的问题，并给出了改进电路。     

蔡氏对偶混沌电路分析

提出了一个新颖的蔡氏对偶混沌电路,并进行了深入的理论研究和计算机仿真分析.得出了几点结论:1)此混沌电路元器件少,且与蔡氏混沌电路结构完全对偶.2)在确定的元器件参数条件下,电路出现双涡卷奇怪吸引子和丰富的混沌动力学行为. 关键词： 蔡氏对偶电路 奇怪吸引子 混沌