| Authors |
Parshukov Maksim Jur'evich, engineer, 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. The converter of operational amplifiers slew rate to time interval based on ultrafast comparators AD8561 is considered. The aim of investigation is to evaluation of the conversion error, depending on the rate of change in time linearly rising and falling voltage.
Materials and methods. The investigation of converter was executed with use of circuit simulation program PSpice and macromodel of comparator AD8561 developed by Analog Devices Company.
Results. Comparators connection and text of task on simulation (cir-file) is given. Durations of time intervals obtained by variation of the rise and fall rates of linearly varying voltage from 1 V/us us 10 V/us at the amplitude of 3 V are determinated. Graphs of the relative error of the converter defined by the slew rate (fall) voltage are given.
Conclusions. The possibility of applying comparator AD8561 to construct of converter speeds rise and fall of the output voltage of the operational amplifiers to time intervals is acknowledged. The dependencies of the relative error of converter from the speed of increase and decrease linearly varying voltage, which allows to set limits on a range of measured voltage change speeds in time.
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| Key words |
operational amplifier, slew rate, converter, time interval, simulation, error.
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