| Authors |
Parshukov Maksim Jur'evich, engineer, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu
Rodionova Nina Vladimirovna, postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu
Sapunov Evgenij Vladimirovich, engineer, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu
Svetlov Anatolij Vil'evich, doctor of technical sciences, professor, head of sub-department of radio engineering and radio electronic systems, Penza State University (40 Krasnaya street, Penza, Russia ), rtech@pnzgu
Nefed'ev Dmitriy Ivanovich, doctor of technical sciences, associate professor, head of sub-department of information and measuring equipment and metrology, Penza State University (40 Krasnaya street, Penza, Russia), iit@pnzgu.ru
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| Abstract |
Background. It is determination of requirements for developed means of measuring the dynamic parameters of operational amplifiers which can be used as independent measuring devices or multipurpose units of automated hardware and software complex.
Materials and methods. It is shown that program-controlled devices for determining the ratio of amplitudes and phase difference of sinusoidal voltages on output and input of the operational amplifiers needed for the measurement of unity gain frequency and phase margin of general purpose operational amplifiers.
Results. The operating frequencies range was defined from 0,1 to 10 MHz.The operating range of amplitude ratio measurement is from –6 to + 6 dB. The operating range of phase difference measurement is from 30 degrees to 150 degrees. The relative measurement error of amplitude ratio and phase difference of signals is no more than 2 % within the operating range.
Conclusions. Requirements for measurement instruments of operational amplifier frequency parameters was formulated. Requirements for the resolution of ADC on output of signals amplitude ratio meter are defined, on the basis of the required resolution in measurement of operational amplifiers unity gain frequency.
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| Key words |
operational amplifier, measurement, unity gain frequency, phase margin, amplitude ratio, phase difference, operating range of measurements, error.
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