Article 8416

Title of the article

MEASUREMENT OF THE AMPLITUDE RATIO AND VOLTAGE PHASE DIFFERENCE
WHEN DETERMINING FREQUENCY PARAMETERS OF OPERATIONAL AMPLIFIERS

Authors

Ishkov Anton Sergeevich, Candidate of engineering sciences, associate professor, sub-department of radio engineering and radio electronic systems, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu.ru
Knyaz'kov Aleksandr Vladimirovich, Student, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu.ru
Rodionova Nina Vladimirovna, Postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu
Sapunov Evgeniy Vladimirovich, Engineer, sub-department of radio engineer ing and radio electronic systems, Penza State University (40 Krasnaya street, Penza, Russia), rtech@pnzgu.ru
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

Index UDK

621.317.3

DOI

10.21685/2072-3059–2016-4-8

Abstract

Background. The authors developed a software-controlled instrument measuring the amplitude ratio and voltage phase difference for determining the unity gain frequency from 0,1 MHz to 10 MHz, and phase stability margin of operational amplifiers.
Materials and method. The authors determined the operating range boundaries of measurements of the amplitude ratio and voltage phase difference. For simultaneous transformation of the amplitude ratio and input and output voltage phase difference of operational amplifiers into constant voltages the researchers used a AD8302 detector.
Results. The authors developed a test bench and methods for experimental determination of calibration characteristics for an instrument measuring the amplitude ratio and an instrument measuring the signal phase difference. The correlation enables to formulate the resolution requirements for the ADC that digitizes the output
voltage ratio of an instrument for measuring the signal amplitude ratio on the basis of a desired frequency resolution when measuring unity gain frequencies of operational amplifiers.
Conclusions. The authors experimentally confirmed the possibility of determining the amplitude ratio of signals on the inputs of the detector with a relative error less than 0,15% and the phase difference with a relative error not exceeding 1,5%.

Key words

operational amplifier, frequency and time parameters measurement, method, macromodel

Download PDF
References

1. Sapunov E. V., Svetlov A. V., Parshukov M. Yu., Komarov V. V. Trudy Mezhdunarodnogo simpoziuma Nadezhnost' i kachestvo [Proceedings of the International symposium “Reliability and quality”]. 2014, vol. 2, pp. 100–102.
2. Svetlov A. V., Parshukov M. Yu., Sapunov E. V., Komarov V. V. Izvestiya vysshikh uchebnykh zavedeniy. Povolzhskiy region. Tekhnicheskie nauki [University proceedings. Volga region. Engineering sciences]. 2014, no. 2 (30), pp. 41–51.
3. AD8302. LF–2.7 GHz RF/IF Gain and Phase Detector. Analog Devices, Inc., 2002. Available at: http://www.analog.com/media/cn/technical-documentation/datasheets/ AD8302.pdf
4. AD9851 CMOS 180 MHz DDS/DAC Synthesizer. Analog Devices, Inc., 2004. Available at: http://www.analog.com/static/imported-files/data_sheets/AD9851.pdf
5. AD9959. 4-Channel, 500 MSPS DDS with 10-Bit DACs. Analog Devices, Inc., 2002. Available at: http://www.analog.com/media/cn/technical-documentation/datasheets/ AD9959.pdf.
6. MCP3422/3/4. 18-Bit, Multi-Channel ΔΣ Analog-to-Digital Converter with I2CTM Inter-face and On-Board Reference. Microchip Technology Inc., 2009. Available at: http://ww1.microchip.com /downloads/en/ DeviceDoc/22088c.pdf

 

Дата создания: 02.08.2017 15:13
Дата обновления: 04.08.2017 11:52