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本文提出了一种基于Π形电路的回转器实现电路的设计方法。该方法通过将电压控制电压源与电阻串联的支路并联接入Π形电路,利用运放电路来实现负电阻和受控源,给出了一种回转器实现电路的设计过程。给出的设计实例和Multisim电路仿真结果,表明本文方法的有效性。所讨论方法易于理解且具有普遍性,对于回转器以外的其它特定二端口电路的设计也具有一定的启发意义。 相似文献
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本文先由旋转器引出两种类型的负回转器模型,并用有源网络给出最简电路实现,然后具体说明了负回转器的多种应用,如实现新型理想变压器,构成负阻补偿电源等。这在电路理论、集成电路设计等方面都具有重要意义。 相似文献
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本文讨论了含源T形电路和含源Ⅱ形电路的等效变换,扩展了T形电路和Ⅱ形电路等效变换的内容。根据含独立电源二端口网络的特性方程,推导了含源T形电路和含源Ⅱ形电路等效变换的条件。含源T形电路和含源Ⅱ形电路等效变换的结果不具有唯一性,但可通过附加一些条件使变换结果唯一,本文给出了这些附加条件。并通过实例说明了推导结果的正确性。本文的分析对电路教学具有一定的价值,可供教学参考。 相似文献
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《Microelectronics Journal》2015,46(11):1060-1068
Genetic algorithm (GA) applications in analog design circuits play an important role with promising results. This algorithm is utilized to generate equivalent circuits for the well-known gyrator circuit which is the most commonly used active circuit for the realization of a grounded inductor. The conventional gyrator circuit is realized by the op-amp which has the drawback of frequency limitations. This paper introduces the gyrator-GA Technique. It is an intelligent technique for generating equivalent gyrator circuits utilizing Second Generation Current Conveyor (CCII) as well as Transconductance Amplifier (TA) circuits. The proposed algorithm is based on the pathological representation of the active blocks. As illustrations to demonstrate the systematic realization of gyrator-GA, a fifth-order Butterworth lowpass filter is designed and simulated using PSPICE. 相似文献
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All possible gyrator circuits using the minimum number of voltage and current unity-gain cells are extracted, as a result of generalizing the unity gains, such that a unity gain can be + 1 or ?1. Since second-generation current conveyors (CCIIs), possessing both voltage and current unity-gain cells, are very suitable for such gyrators, it is shown that inclusion of the recently proposed ‘inverting secondgeneration current conveyor’ (ICCII) in the design enables implementation of all types of extracted gyrators. The number of possible gyrator configurations is eight, one of them being the well-known Sedra–Smith gyrator and another its x -input counterpart; both utilize only CCIIs. The remaining possible six gyrators are new and utilize ICCIIs as well. Like the Sedra–Smith gyrator, all the circuits employ a minimum number of passive elements and similar types of active components, namely CCIIs and/or ICCIIs. The effects of current conveyor non-idealities and parasitics on important gyrator applications are also investigated. A highperformance dual-output CMOS ICCII is designed and used in SPICE simulations of two important gyrator applications in order to verify the theoretical results. Also, as a design example, an elliptic filter is realized and simulated. 相似文献
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Synthesis of Quarter-Wave Coupled Junction Circulators with Degrees 1 and 2 Complex Gyrator Circuits
《Microwave Theory and Techniques》1985,33(5):382-390
The complex gyrator immittance of circulators for which the in-phase eigennetwork is commensurate with those of the degenerate counter-rotating ones, and which may be idealized by a frequency-independent open- or short-circuited boundary condition, may be realized as a 1-port STUB-resistor network of degree 1. If the frequency variation of this eigennetwork cannot be neglected compared to those of the other two, the gyrator circuit is of degree 2. There are altogether eight possible complex gyrator circuits, each of which explicitly exhibits the eigennetworks of the device. A knowledge of that, applicable in any given situation, is mandatory for design. 相似文献
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Ahmed M. Soliman Author Vitae 《AEUE-International Journal of Electronics and Communications》2012,66(4):286-293
The three port gyrator was introduced and defined in [1] in two alternative forms of the admittance matrix (Y). Four alternative realizations of the three port gyrator using three transconductance amplifiers (TA) are given, three of them are new. Sixteen alternative three port gyrator circuits using four current conveyors (CCII) or four inverting current conveyors (ICCII) or a combination of both of them and four grounded resistors are given. Eight alternative three port gyrator circuits using two CCII or two ICCII or a combination of both of them, balanced output current conveyors (BOCCII) and three grounded resistors are also introduced. Eight alternative three port gyrator circuits using two CCII or two ICCII or a combination of both of them, differential voltage current conveyors (DVCC) and three grounded resistors are also introduced. Finally four equivalent three port gyrator circuits using a combination of DVCC and BOCCII and two grounded resistors are also introduced, three of them are new. 相似文献
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现代电子系统中不少电路需要负电压作为供电或控制,而传统使用变压器电路的方法具有体积大效率低的缺点。分析了负电压产生的原理,结合工程实际应用提出一种基于LTC3863的负电压电路设计方法,并对电路中主要器件参数进行分析和计算。仿真及试验结果验证表明,该电路具有转换效率高、体积小等特点,可以在各种嵌入式及手持终端设备中广泛使用。 相似文献