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Current Conveyor and Its Applications

CII to achieve 【it't '(4) current-controlled voltage source (CCVS): The characteristic equation of two-port Z-bite parameters with po = oJLi ~'] and equation (1), only a voltage dependent variable, so consider Two CCU to achieve, namely:] = Chung] ・ ': jjI,. . . Ux2: r ': j, and Ux2U3, 2, ・' ・ Uy2r. : I in Figure 5. Figure 5 implemented by the CC11 CCVS (5) negative impedance converter (NIC): The characteristic equation can be inverted two-port H (G) parameter description: [illFoolru, '] control power equation (1 ),]('. i : =. 'i = i.: i Smile

, the circuit shown in Figure 6 can be used to achieve NIC. (6) rotary device (NIC): The characteristic equation of two-port Y-parameters can be described: group] if the gyrator admittance matrix can be decomposed into y []=[:]+[ to achieve with two VCCS shown in Figure 7. Figure 7 by the CC11 gyrator gyrator implemented application example: the manufacture of integrated circuits,[link widoczny dla zalogowanych], capacitors can be easily integrated to achieve the difficult integration of the inductor. Therefore, using a gyrator and a single capacitor can be simulated inductance, and turn the two devices can be used together to achieve the opposite polarity CC1I. A grounding capacitor connected as long as the two ports in the CC1I one on another port from the impedance looking into a grounded inductor is shown in Figure 8, the equivalent inductance. \Figure 8 CC Ⅱ imitation of the inductor can be achieved not only the active network devices,[link widoczny dla zalogowanych], you can achieve a variety of analog components j ten count, so mow better performance in the design of high frequency, large-signal analog circuitry has important practical value. References [1] Yang Shan. Linear Network Analysis, Beijing: Higher Education Press, l987 [2] Cai Xuan III. Circuit. Beijing: Staff Education Press, l988 [3J Qiu off source. Network theory to analyze Beijing: Zhi tt {University Press, l982 【4] Dong sight, Yang Mingjie. Analog circuit technology, data compilation. Beijing: Higher Education Press. 1998. [5] AS. s 【, thaandK. C. Smith,. -Kcc. ond - generationcurrentcon% 'evoranditsappllca. tlon ~ \circuit board manufacturing process standards and norms, hierarchical layout of analog and digital circuits, the circuit board in order to achieve compatibility between the 4.. to master and use EMC testing technology. to ensure product quality is to achieve electromagnetic compatibility EMC testing to ensure quality technical means indispensable. whether the performance of the product EMC EMC compliance testing needs to be measured. In addition, the EMC product design and development process, the EMC prediction and assessment of the compatibility to early detection of possible electromagnetic interference and adopt the necessary inhibition of store and take protective measures to ensure EMC product. EMC test standards and norms must be based on the test methods are given, and the standard for judging the basis of specified limits. electromagnetic compatibility measurement mainly by means of the test site and test equipment components, measuring instruments based on a frequency domain, the test site is a prerequisite for EMC testing,[link widoczny dla zalogowanych], EMC is also a measure of an important factor in the level of work. EMC testing greatly influenced by the site, particularly in the electromagnetic radiation emission, Radiation and radiation receiver sensitivity test on the most demanding venues. At present, domestic and international test sites commonly used are: open field,[link widoczny dla zalogowanych], semi-anechoic chamber, shielded room and small room TEM. In terms of test equipment to the spectrum analyzer as the core of the automatic detection system that can quickly and accurately provide EMC related parameters. The new EMC scanner combined with the spectrum analyzer to achieve visualization of electromagnetic radiation may be individual components of the system, PCB, Machine and cables for a full range of three-dimensional test, showing the true status of electromagnetic radiation. 5 Conclusion EMC as an interdisciplinary high-tech, with its quality assurance system in the important role of Xin gradually been recognized to improve the implementation of EMC standards of consciousness, strictly off the design and testing. elimination of electromagnetic interference, to achieve electromagnetic compatibility, and fundamentally improve the quality and reliability. ■ Measurement and Testing Technology 2004 ・ No_.8

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