共查询到20条相似文献,搜索用时 703 毫秒
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文章提出了一种基于折叠集的混合模式BIST低功耗设计方案,该设计方案通过对混合模式BIST的优化设计,得到伪单输入跳变的测试向量集,从而达到降低待测电路功耗的目的. 相似文献
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该文提出一种在单输入控制器下基于忆阻器的混沌同步模拟电路设计及其实现方法,并将它应用于基于忆阻混沌同步的保密通信。首先,基于混沌同步理论,构建了混沌同步系统及保密通信模型,并设计实现了一种4阶压控忆阻混沌电路和混沌加密解密电路。其次,将所设计的忆阻混沌电路作为混沌驱动和响应电路,根据它们的误差系统设计了一种单输入混沌同步控制器,并将其实现于忆阻混沌同步电路当中。最后,完成了基于忆阻混沌同步的保密通信电路实验。实验结果表明,所设计忆阻混沌同步电路结构简单、操作方便、波形良好,在单输入控制器下电路能够快速同步并保持稳定,且在保密通信实验中信号还原度高、受损程度小、抗破译能力强,具有一定的理论意义与潜在的实用价值。 相似文献
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The formulation of Josephson circuit equations in the DC state is discussed and a mixed-mode approach that combines the nonlinear solution method of source-stepping and time-domain method of numerical integration is proposed. Since Josephson circuit equations are often multivalued, the mixed-mode algorithm follows the paths of the independent sources, detects ill-conditioned points, and converges to stable points on the characteristic curves of the simulated circuit. The algorithm uses a combination of source stepping and transient calculation with resistive damping. An adaption of method to superconducting quantum interference device (SQUID) threshold curve calculation is also discussed. The techniques are suitable and presented in sufficient detail, so that a reader may implement them as part of a general simulation program such as JSIM or SPICE 相似文献
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Winai Jaikla 《Microelectronics Journal》2011,42(1):135-140
This paper presents a new realization of resistorless mixed-mode (i.e. both voltage-mode and current-mode) quadrature sinusoidal oscillator using a new active building block (ABB) called the differential voltage current-controlled conveyor transconductance amplifier (DVCCCTA). The proposed oscillator circuit uses a single DVCCCTA, two grounded capacitors (GCs) and does not employ any external linear resistors. The tuning laws for the condition of oscillation (CO) and the frequency of oscillation (FO) are non-interactive; and controlled by separate bias currents. The circuit provides two explicit quadrature current outputs and two quadrature voltage outputs and thus can be classified as a mixed-mode quadrature oscillator. Another notable feature of the proposed circuit is that it can also be used as a biquadratic filter to realize low-pass and band-pass filtering functions simultaneously. Non-ideal analysis of the circuit is provided and PSpice simulation results have been included to verify the workability of the proposed circuit. 相似文献
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集成化混沌振荡器是混沌在实际应用中的一种重要趋势,特别是在大规模的混沌系统的电子实现方面。为了使混沌振荡器的集成度更高,并且具有较宽的频带,本文提出了一种新型的电流模式混沌振荡器。通过对自治混沌振荡器的电路模型分析,在文氏混沌电路基础上,采用CCII电路代替电压运算放大器、跨导运算放大器等传统运算放大器,实现了正弦波振荡电路,通过采用NMOS管将两个正弦振荡电路耦合最终实现电流模式混沌振荡器,通过对该电流模式混沌振荡器建模并进行仿真分析,描述了该振荡器的混沌行为,验证了该混沌电路的有效性和可行性。再通过仿真结果对比表明该混沌振荡器相比于传统的文氏混沌振荡器功耗更小、噪声抑制能力更强,由其产生的混沌信号在频带宽度、随机程度方面都有明显提高,更适合芯片集成。 相似文献
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一种混沌网络简单电路实现 总被引:2,自引:0,他引:2
本文利用简单的非线性电子元件设计成混沌电路,该电路具有设计简单,易于集成等特点。利用多控制参数使得该混沌电路具有丰富的混沌动力学行为,本文利用Lyapunov指数,从理论上分析控制参数对电路输出的影响。根据理论分析结果,调节电路的参数,可以成功地看到不动点、倍周期、混沌现象。这一简单电路可望在混沌神经网络,混沌通讯领域获得应用。 相似文献
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针对某些雷达、通信等系统在应用中对混沌信号频域带宽的要求,设计了一种基于考毕兹振荡器电路的宽带混沌信号发生器。该混沌信号产生电路由考毕兹振荡器为基本谐振电路、级联若干容阻串并联单元的选频网络构成,混沌信号的上下限频率分别由基本谐振电路和第一节容阻串并联网络参数决定,通带频谱的平坦性受其他级联选频网络影响。根据初步分析和仿真试验,该混沌电路组成结构简单,能够产生带宽超过60MHz较为平坦的宽带混沌信号。 相似文献
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Design of a sensorless commutation IC for BLDC motors 总被引:2,自引:0,他引:2
Kuang-Yao Cheng Ying-Yu Tzou 《Power Electronics, IEEE Transactions on》2003,18(6):1365-1375
This paper presents the design and realization of a sensorless commutation integrated circuit (IC) for brushless DC motors (BLDCMs) by using mixed-mode IC design methodology. The developed IC can generate accurate commutation signals for BLDCMs by using a modified back-EMF sensing scheme instead of using Hall-effect sensors. This IC can be also easily interfaced with a microcontroller or a digital signal processor (DSP) to complete the closed-loop control of a BLDCM. The developed sensorless commutation IC consists of an analog back-EMF processing circuit and a programmable digital commutation control circuit. Since the commutation control is very critical for BLDCM control, the proposed sensorless commutation IC provides a phase compensation circuit to compensate phase error due to low-pass filtering, noise, and nonideal effects of back-EMFs. By using mixed-mode IC design methodology, this IC solution requires less analog compensation circuits compared to other commercially available motor control ICs. Therefore, high maintainability and flexibility can be both achieved. The proposed sensorless commutation IC is integrated in a standard 0.35-/spl mu/m single-poly four-metal CMOS process, and the realization technique of this mixed-mode IC has been given. The proposed control scheme and developed realization techniques provide illustrative engineering procedures for the system-on-a-chip solution for advanced digital motor control. Simulation and experimental results have been carried out in verification of the proposed control scheme. 相似文献
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Acuna E.L. Dervenis J.P. Pagones A.J. Yang F.L. Saleh R.A. 《Solid-State Circuits, IEEE Journal of》1990,25(2):353-363
The techniques used in the iSPLICE3 simulator for the analysis of mixed analog/digital circuits are described. iSPLICE3 combines circuit, switch-level timing, and logic simulation modes and uses event driven selective-trace techniques. It also uses a hierarchical schematic capture package called iSPI (Simulation Program Interface) for design entry, circuit partitioning, and simulation control. The contributions here include a new DC solution method, a mixed-mode interface modeling technique, and an automatic partitioning approach for MOS logic circuits. The details of these three methods are provided, along with the architecture and transient simulation algorithms used in iSPLICE3. The results of circuit simulations and mixed-mode simulations of a CMOS static RAM, two A/D converters, and a phase-locked loop are presented. These results indicate that iSPLICE3 is between one and two orders of magnitude faster than SPICE2 with negligible loss in accuracy 相似文献
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本文提出了一种基于折叠集的test-Der-clock结构的混合模式BIST设计方案,并且进行了低功耗的整体优化设计.该设计方案在电路结构上利用双模式LFSR将两部分测试生成器有机的进行了结合,针对伪随机测试序列与折叠测试序列两部分采用了不同的措施来优化测试生成器的设计,从而达到降低被测电路功耗的目的. 相似文献
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经典的蔡氏电路是一个简单混沌电路,能够产生丰富的混沌现象,然而该电路的系统参数基本上是固定的,不同混沌电路之间的电路不具备通用性。基于此,本文提出在Multisim仿真软件上通过模块化的设计方法重构蔡氏混沌电路,利用常见的运算放大器、电阻、电容电子元件组成混沌系统的线性部分,着重介绍了如何利用多个二极管实、运放等实现复杂绝对值非线性函数,并给出蔡氏混沌电路相应的硬件仿真结果。 相似文献
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宽带混沌信号拥有良好的相关特性、低截获概率和高保密性等优点.本文介绍了一种基本的混沌信号产生电路-Colpitts振荡电路,在此基础上,对该电路作了相关改进,同时通过仿真对它们的性能进行了分析比较.结果显示:对三阶Colpitts振荡电路的改进方法是可行的;三阶Colpitts振荡电路频谱较为集中,且自相关性能差,应用... 相似文献
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本文以Lorenz混沌系统的电路实现为例阐述了电路创新综合实验的设计。Lorenz混沌系统可由乘法器及比例放大电路、积分电路等综合实现。在电路实现之前采用Matlab和PSpice两种软件从系统级和器件级两方面对该系统进行仿真。通过电路仿真结合电路实现的这种“虚-实”结合的实验方案,使学生对电路设计的过程更加熟悉,达到... 相似文献
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该文采用文氏桥振荡器和磁通控制的分段线性忆阻器,设计了一种新的单一参数控制的混沌电路。通过调节控制参数,该系统在忆阻器的非线性作用下,通过倍周期分岔产生了混沌和超混沌现象。利用常规的动力学分析手段研究了电路参数变化时系统的动力学特性,例如平衡点稳定性分析,李雅普诺夫指数谱和分岔图。为了验证电路的正确性,该文采用集成运放和压控开关实现了一个分段线性磁控忆阻器的模拟等效电路,并将该系统应用于提出的混沌电路,Pspice仿真结果与理论分析完全吻合。 相似文献