Article 5214

Title of the article

METHOD OF MEASURING UNITY GAIN FREQUENCY OF OPERATIONAL AMPLIFIERS 

Authors

Svetlov Anatoliy Vil'evich, Doctor of engineering sciences, professor, head of sub-department of radio engineering and radio electronic systems, Penza State University (40 Krasnaya street, Penza, Russia ), rtech@pnzgu.ru
Parshukov Maksim Yur'evich, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia ), parshucow@bk.ru
Sapunov Evgeniy Vladimirovich, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia ), rtech@pnzgu.ru
Komarov Vsevolod Vladimirovich, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia ), v.komarov09@rambler.ru

Index UDK

621.317.3

Abstract

Backgroung. The authors considered a topical problem of developing methods of automatic measurement of the unity gain frequency of operational amplifiers, the use of which will contribute to the organization of chip mass incoming inspection at instrument engineering enterprises.
Results. The researchers suggest a method of automatic measurement of the unity gain frequency of operational amplifiers, distinguished by that the frequency of the test signal applied to an analyzed operational amplifier to evaluate its gain does not change smoothly, but discretely, starting from the minimum value of the unity gain frequency with subsequent doubling of the frequency, and then with iterative narrowing of the search range of the frequency at which the gain of the operational amplifier becomes less than one at a given frequency resolution. A distinctive feature of the considered method is the possibility of performing all its stages in the automatic mode. For this purpose the authors developed an algorithm of measurement process control and its implementation in the environment of LabVIEW.
Conclusions. Performed in accordance with this method the operation control of the operational amplifiers offer high performance and can be recommended for the organization of 100% incoming inspection of chips at instrument engineering enterprises. Working capacity and high efficiency of the developed methods, algorithms
and programs are confirmed by their use in construction of a multi-functional hardware and software complex for the OpAmp's parameters measurement.

Key words

operational amplifier, unity gain frequency, measurement, method, algorithm.

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References

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5. Svetlov A. V., Parshukov M. Yu., Baydarov S. Yu., Komarov V. V. Nadezhnost' i kachestvo – 2012: tr. Mezhdunar.o simpoziuma: v 2-kh t. [Reliability and quality – 2012: proceedings of the International symposium in 2 volumes]. Penza: Izd-vo PGU, 2012, vol. 2, pp. 7–10.
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Дата создания: 29.08.2014 15:06
Дата обновления: 01.09.2014 10:04