共查询到18条相似文献,搜索用时 67 毫秒
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本文纠正了RC实验中普遍存在的测量和计算错误。介绍了RC串联电路充放电过程正确测量和计算电容两端的电压。 相似文献
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实现了基于LabVIEW和声卡的虚拟信号发生器和虚拟数字示波器,并利用虚拟信号发生器的方波信号作为RC串联电路的激励信号,利用虚拟数字示波器显示RC电路的暂态过程图,并给出精确测量RC串联电路时间常数的实验方法。 相似文献
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引言现有的普通物理实验教材中,对RC、RL和LRC电路暂态过程的描绘,多采取用方波发生器代替直流电源,用示波器观察或用照相法摄取暂态曲线,RC电路的暂态过程,也可以用电压表和秒表逐点测量来描绘曲线。这些方法或只能观察,定量分析不便,或虽能定量分析,但实验过程复杂,效果都不理想。本文介绍用函数记录仪直接描绘RC、RL和LRC电路的暂态过程曲线,实验方法简便,而且利用图象进行定量分析和计算都很方便。 相似文献
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A novel inductance-free nonlinear oscillator circuit with a single bifurcation parameter is presented in this paper. This circuit is composed of a twin-T oscillator, a passive RC network, and a flux-controlled memristor. With an increase in the control parameter, the circuit exhibits complicated chaotic behaviors from double periodicity. The dynamic properties of the circuit are demonstrated by means of equilibrium stability, Lyapunov exponent spectra, and bifurcation diagrams. In order to confirm the occurrence of chaotic behavior in the circuit, an analog realization of the piecewise-linear flux-controlled memristor is proposed, and Pspice simulation is conducted on the resulting circuit. 相似文献
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阻容振荡型“De-Qing”电路参数的最佳设计 总被引:1,自引:0,他引:1
在调制器电压调整技术中,发展了阻容振荡型“De-Qing”电路最佳设计。当引入一个新的参数T_3/T后,则“De-Qing”电路参数的选择变得十分简捷,可以一次求出最佳参数。求出的“De-Qing”电路参数可以使电路在调整度由零到最大设计值的整个范围内均能工作。当“De-Qing”电路中时间常数选为3RC或5RC时,调整度极值分别为0.36或0.29。 相似文献
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Huamao Huang Chao Wang Haocheng Wu Cheng Huang Zhuobo Yang Hong Wang 《Optical and Quantum Electronics》2018,50(9):349
The equalization circuit in the visible light communication (VLC) system has large impacts on the frequency response and can greatly improve the 3-dB modulation bandwidth. The optimization of the two-stage common-emitter transistor amplifier for equalization circuit is presented in detail and the design rules are disclosed. At first, the frequency response of the single-stage amplifier is derived and the simulated characteristic curves illustrated the changing regularity of four main factors are given. Subsequently, the frequency response of the two-stage amplifier is investigated by simulation. It is shown that the capacitors in the resistance–capacitance (RC) network has large impacts on the low-frequency range, while the resistors in the RC network can adjust the high-frequency, and the resistors in the emitter can adjust the low-frequency. Experimental measurements of the fabricated equalization circuit demonstrated the simulation results. Then, the two-stage amplifier is induced as post-equalization circuit (post-EQC) or pre-equalization circuit (pre-EQC) and the measured frequency response curves are given. The equalization circuit with proper sets of capacitors and resistors would flatten the frequency response curve of the VLC system. It is shown that the 3-dB modulation bandwidth of the VLC system equipped with post-EQC or pre-EQC can be expanded to 292 MHz or 304 MHz, respectively. Moreover, if the photoelectric receiver and the post-EQC are combined in the optimization, the 3-dB modulation bandwidth can be expanded to 375 MHz. 相似文献
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基于RC电路模型的激光诱导生物组织光热效应 总被引:1,自引:0,他引:1
针对激光诱导生物组织温升预测问题提出了一种新的RC电路理论模型。根据基尔霍夫电压定律(KVL)推导了RC电路的系统函数和单位冲激响应,根据单位冲激响应和矩形输入信号的卷积得到RC电路的零状态响应模型,由激光照射下生物组织温度实验结果确定模型中的两个固定参数,提出了两种模型参数计算方法并进行模拟计算。理论计算与实验结果显示温度响应曲线一致,肝脏和肌肉组织峰值温度相对误差范围分别为-0.0557℃~-0.0025℃和0.0139℃~0.0641℃,温度曲线平均相对误差范围分别为0.55%~2.39%和0.38%~0.99%,这种方法较经典的Pennes生物热传输方程模型所需参数少,精度更高,为激光与生物组织光热效应研究提供了一种新方法。 相似文献
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This paper provides an analysis in the time and frequency domain of an RC electrical circuit described by a fractional differential equation of the order 0 < α≤ 1. We use the Laplace transform of the fractional derivative in the Caputo sense. In the time domain we emphasize on the delay, rise and settling times, while in the frequency domain the interest is in the cutoff frequency, the bandwidth and the asymptotes in low and high frequencies. All these quantities depend on the order of differential equation. 相似文献
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