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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本文针对电路教科书指出的有两种情况可能会出现冲激电流和冲激电压的情况,通过举例说明,电容电压和电感电流的跃变可以在多种情况下发生。笔者还讨论了电容电压和电感电流跃变与换路定律之间的关系,即电容电压和电感电流跃变是对实际电路理想化建模的结果。本文通过实例指出正确理解电容电压和电感电流的跃变,有助于简化电路的分析。 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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本文对利用Blumlein平行平板传输线制作的氮分子激光器进行了研究。通过对脉冲形成线式的电路放电时情况的分析,说明回路的电感是由储能传输线、脉冲形成线、火花隙、腔体的电感以及传输线与火花隙连接线电感所决定的。为了获得陡的放电脉冲,必须尽量减小这些分布电感。 相似文献
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本文将正反馈引入到单放大器无限增益负反馈结构中,提出了四个新的带有部分正反馈的单放大器开关电容带通滤波器,得到了这些电路在给定极点频率ω_0和(?)值的设计方程和最小电容分布的最佳设计。同文献中的电路相比,本文电路的电容分布得到大幅度地减小。 相似文献
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In this paper, a new circuit to synthesise negative capacitor by using MOSFETs is proposed. This circuit has been analysed exactly. Output admittance, value of negative capacitor and frequency limitations of proposed architecture, has been investigated accurately and related equations are obtained theoretically in presence of all parasitic capacitors. Also, this new negative capacitor structure is simulated in TSMC 0.13 µm CMOS Technology. Simulation results confirm the analytical predictions. By variation of gm and CX in proposed architecture, negative capacitor can be obtained in higher frequencies up to 15 GHz. 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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针对Class-E功率放大器传输效率受MOSFET寄生电容的影响,提出了一种提高传输效率的方法。通过调节RLC回路中串联谐振电容的数值,提高旁路电容的数值,调节负载回路,使其超过MOSFET自身的输出寄生电容,以达到提高输出效率的目的。计算及仿真结果表明该方法在13.56 MHz下,可以将Class-E的旁路电容的值提高到120~160 pF,大大超过了IRF510的102.98 pF的寄生输出电容。最后,通过MSO3012混合信号示波器测量电路的传输效率,并对解决方案评估和改进,将Class-E的能量传输效率从改进前的37.1%提高到改进后的54.4%。据此,实现了Class-E在神经假体中数据与能量传输的应用。 相似文献
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A new lossless synthetic floating inductance circuit, employing a grounded capacitor and CC IIs as active elements, is presented which, in contrast to recently reported circuits, does not require any component-matching condition for the desired realisation. The other novel features of the circuit are use of a minimum possible number of passive components and inductance control through a single grounded resistor. 相似文献
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Capacitor parasitic inductance often limits the high-frequency performance of filters for power applications. However, these limitations can be overcome through the use of specially-coupled magnetic windings that effectively ify the capacitor parasitic inductance. This paper explores the use of printed circuit board (PCB) transformers to realize parasitic inductance cancellation of filter capacitors. Design of such inductance cancellation transformers is explored, and applicable design rules are established and experimentally validated. The high performance of the proposed inductance cancellation technology is demonstrated in an electromagnetic interference (EMI) filter design. 相似文献
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随着大容量远距离输电的发展,串联电容补偿技术在超高压、远距离输电中得到了广泛应用。文中介绍了串联电容补偿装置的构成、工作原理,以及等效模型的不同工作方式,分析了MOV的工作特性。串联电容补偿技术是一项成熟的技术,通过串联电容补偿线路感抗,缩短交流传输的电气距离,降低线路输送损耗,改善线路的电压质量,提高线路传输功率,更加合理地分布输送功率,提高系统的动态稳定和静态稳定性。 相似文献
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