共查询到19条相似文献,搜索用时 125 毫秒
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介绍了一种测量电容的新方法,以RLC串联谐振电路为基础,将待测电容与电阻、电感串联起来组成RLC振荡电路。当电路达到谐振状态时,当电感已知,可得待测电容的值。此方法测量原理简单,操作方便,测量结果精确度较高,值得推广。 相似文献
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本文对RLC串联谐振回路图示均衡器的电路原理进行了研究及MATLAB仿真研究,推导出RLC串联谐振回路图示均衡器提升量与衰减量等重要设计计算公式。提出了一种模拟电感的设计电路并推导出模拟电感的设计计算公式,为将模拟电感应用于研制制作图示均衡器打下了理论基础。 相似文献
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针对非线性RLC电路的频响特性和周期解稳定性等问题,建立了电感非线性RLC串联电路的动力学方程。利用谐波平衡法,导出了电感非线性RLC串联电路的频率响应方程,研究了频率响应特性曲线的跳跃和滞后现象及其不产生谐振现象的条件;分析了该电路周期解的稳定性,得出了稳定区和不稳定区的分界线方程;讨论了非线性因素的影响,得出了忽略RLC串联电路的电感非线性因素的条件。 相似文献
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本文根据我校大学物理实验室的现状,设计出电磁学组合实验仪,能够完成RC、RL、RLC串联电路的谐振及暂态特性、交流电桥等学生实验,能够进行电阻、电容、电感等物理量的测量。不仅给学生的学习以更大的选择空间,而且可以增强学生的综合实验和创新实验能力。 相似文献
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介绍电感、电容、串联电路、并联电路的特点,分析电感、电容对高频率的电视载波信号和低频率的交流信号所呈现的特性,对两信号的分离与合成进行阐述,介绍如何利用串联谐振和并联谐振回路对信号进行特殊处理. 相似文献
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介绍电感、电容、串联电路、并联电路的特点 ,分析电感、电容对高频率的电视载波信号和低频率的交流信号所呈现的特性 ,对两信号的分离与合成进行阐述 ,介绍如何利用串联谐振和并联谐振回路对信号进行特殊处理 相似文献
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介绍电感、电容、串联电路、并联电路的特点,分析电感、电容对高频率的电视载波信号和低频率的交流信号所呈现的特性,对两信号的分离与合成进行阐述,介绍如何利用串联谐振和并联谐振回路对信号进行特殊处理。 相似文献
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In the random radio puzzle, imagine an early "ham" trying to assemble an oscillatory RLC circuit by randomly grabbing a resistor, a capacitor, and an inductor out of separate boxes filled respectively with resistors, capacitors, and inductors of various values. The problem of providing a solution for the probability that the resulting circuit will oscillate is presented in the paper. 相似文献
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介观RLC电路在热相干态和热压缩态下的量子涨落 总被引:8,自引:3,他引:5
利用热场动力学的方法研究了介观RLC电路在有限温度下的相干态和压缩态中电荷和磁通量的量子涨落.结果表明,介观RLC电路中电荷和磁通量的量子涨落不仅与电路中的元件参数而且可能与环境温度和压缩参数有关,而这些量子涨落与平移参数无关. 相似文献
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A method to provide a low power tunable inductor is presented in which the inductance and its equivalent series resistance can be independently tuned. This equivalent series resistance can be also set to negative or zero value that is corresponding to inductor with ideal quality factor. In this method, a varactor is placed in parallel with a passive inductor and then, an active capacitor is placed in series with them. To this end, a low power Tunable Active Capacitor (TAC) is proposed which is capable of generating tunable capacitor and large negative resistance to compensate the loss of tunable inductor circuit. Also, the power consumption is low because of using a diode-connected transistor. A prototype of the proposed circuit is designed and simulated at 4 GHz. The electromagnetic simulation results show the inductance tuning range of 0.48–2.3nH with zero or even negative equivalent series resistance is obtained while the power dissipation is less than 3 mW. Moreover, noise analysis shows that higher inductance translates to lower noise while there is a weak correlation between noise and quality factor of the obtained inductances. 相似文献
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本文首先对RLC串联电路中总电阻R的变化对应的五种工作状态进行理论分析,针对具有负内阻电压源的RLC串联电路在实验过程中示波器很难采集无阻尼振荡波形的现象,指出因电容电压初始值不同而得到不同振幅的无阻尼震荡波形是示波器显示波形不稳定的原因,提出改进电路,并通过仿真及实验验证了改进电路的可行性. 相似文献
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二阶网络暂态过程有几种情况,理论计算复杂,课堂上难以直观展现。在此以RLC串联电路的零输入响应为例,提出了用Multisim8软件研究二阶网络的暂态过程及状态轨迹的方法。在过阻尼、临界阻尼以及欠阻尼3种情况下,利用Multisim8软件的虚拟仪器对RLC串联电路的电容电压、电感电流的暂态过程及对应的网络状态轨迹进行仿真和展示。结果表明,Multisim8软件可以形象直观、快速准确地实现二阶网络的动态分析,用其仿真是一种很好的辅助教学手段。 相似文献
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Yu Cao Groves R.A. Xuejue Huang Zamdmer N.D. Plouchart J.-O. Wachnik R.A. Tsu-Jae King Chenming Hu 《Solid-State Circuits, IEEE Journal of》2003,38(3):419-426
A wide-band physical and scalable 2-/spl Pi/ equivalent circuit model for on-chip spiral inductors is developed. Based on physical derivation and circuit theory, closed-form formulas are generated to calculate the RLC circuit elements directly from the inductor layout. The 2-/spl Pi/ model accurately captures R(f) and L(f) characteristics beyond the self-resonant frequency. Using frequency-independent RLC elements, this new model is fully compatible with both ac and transient analysis. Verification with measurement data from a SiGe process demonstrates accurate performance prediction and excellent scalability for a wide range of inductor configurations. 相似文献
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Resonant converters of 50 (60) Hz AC-DC are described, where each half cycle of network voltage the capacitor and inductor of an oscillatory circuit are switched from series into parallel and vice versa. The duration of series and parallel connection and also the transformer ratio are parametrically dependent on load. In the case of short circuit, only the parallel oscillating circuit operates. This restricts sharply the output current. The reactive power of the capacitor and the inductor compensate each other, both in the cases of series and parallel connection. Therefore, the power factor is very high from no load to short circuit. This converter fits very well for supplying arc furnaces, and there is no need for the costly and fast reactive power compensator and filter circuits. The operating principle of the converter, design principles, and a real operating converter rated 5.4 MW supplying a steel-melting arc furnace are described 相似文献
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Shahram Minaei Erkan Yuce 《AEUE-International Journal of Electronics and Communications》2012,66(11):884-891
In this paper, a new CMOS grounded positive tunable inductor simulator based on using two simple CMOS transconductors and an inverting amplifier is presented. The introduced inductor simulator uses a grounded capacitor; accordingly, it is suitable for integrated circuit (IC) fabrication. In addition a CMOS circuit for realizing negative tunable resistor which can be used for parasitic cancellation in inductor simulators and consequently enhancing their frequency performances is developed. A novel method for providing high-frequency performance improvement of simulated inductors is also introduced. Simulation and experimental results are given to demonstrate the performance of the developed inductor simulator and validity of the proposed frequency performance improvement method. 相似文献