Search results for: E. V. Semyonov
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Russian Physics Journal > 2019 > 62 > 6 > 1090-1095
A model of the p–n junction that adequately describes the non-quasi-static effects of accumulation and relaxation of nonequilibrium charge carriers is considered. In this case, the diffusion charge equation is written in a closed form resolved with respect to the diffusion charge. This allowed computer programming of this model to be performed without user-defined recursion resolving the differential...
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The analysis of the inaccuracy of indirect measurements of capacitance-voltage characteristics (CVC) at an ultra-short pulse impact for known inaccuracy of direct measurements of voltage applied to an element and current through the element was carried out. The dependence of inaccuracy of CVC measurement from active current through the element is shown. On the example of a Schottky diode for its use...
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A method for the characterization of dielectrics allowing simultaneous measuring of relaxation, conduction losses and dielectric nonlinearity at the short-pulse impact is proposed. In this case we may evaluate the function of the instantaneous power loss versus time. An example of practical measurement of characteristics of two capacitors with very different relaxation losses is given.
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Russian Physics Journal > 2014 > 56 > 9 > 1039-1045
Theoretical and experimental investigations have been carried out to study the possibility of electric contact diagnostics by the method of nonlinear reflectometry with allowance for thermoelectric effects. The characteristics of the nonlinearity of high- and low-quality electric contacts caused by their response to test signals are presented. The possibility is demonstrated of determining the intrinsic...
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Experimental investigation of checking possibility of diagnostics of electrical contacts using the nonlinear reflectometry method in terms of the thermo effects was carried out. The summary gives the characteristics of nonlinearity high-quality and defective electrical contacts, associated with their reaction to test.
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The peculiarities of practical realization of the method, that provides measurement of the current-voltage and capacitance-voltage characteristics by ultra-short pulses, are considered.
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The experimental setup for analyzing the characteristics of nonlinearity of objects in the pulse mode with picosecond duration signals is developed.
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The synthesis of directional couplers with a non-periodical bandpass and suppression in the frequency dependence s21(f) is realized. DC's are constructed on the basis of irregular relief coupled strip structures with orthogonally arranged substrates and conductors. Step-irregular structures are taken as a basic prototype.
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The measurement control software that provides the uniform methods and interface with virtual measurements is considered. This uniformity allows considering the hardware and virtual instrumentation as a single tool for diagnosing the quality of nonlinear models of the elements at UWB and pulse impacts.
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The method of obtaining current-voltage (IVC) and capacity-voltage (CVC) characteristics of an element based at ultra-short baseband impact is considered. The impact can be shorter than duration of impulse response of an element.
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The results of the research and development of the instrumentation for measurement of UWB nonlinear distortion are shown. Calculations of application of measuring systems with limiting frequency 1.5 and 18 GHz are presented.
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It is shown that an approach included investigation of the nonlinearity characteristics of signals transformation by an element is preferable to quality diagnostics of nonlinear models of elements. The software tools and measuring device which allow carrying out such diagnostics for baseband pulse signals are specified.
