AMPLITUDE DETECTOR FOR CONSTRUCTING INSTRUMENTS TO MEASURE PARAMETERS OF RESONANT ELECTRIC CIRCUITS 

Svetlov Anatoliy Vil'evich, doctor of technical sciences, professor, head of sub-department of radio engineering and radio electronic system, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: rtech@pnzgu.ru
Nguyen Ngoc Manh, postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: rtech@pnzgu.ru 

621.317.73 

10.21685/2307-5538-2020-2-4 

Background. Development and research of an amplitude detector designed for constructing instruments to measure parameters of resonant electrical circuits.
Materials and Methods. A circuit of the amplitude detector has been selected, and a stand and a technique for experimental studies of the detector have been developed.
Results. Experimental studies of the amplitude detector in the range of alternating voltage amplitudes from 1.0 V to 10.0 V and in the frequency range of alternating voltage from 20 kHz to 500 kHz have been performed.
Conclusions. The investigated amplitude detector converts the amplitude of alternating voltage of a sinusoidal shape to a constant voltage with a relative error of less than ± 1 % in the range of alternating voltage amplitudes from 5.0 V to 10.0 V and in the frequency range of alternating voltage from 20 kHz to 200 kHz. It is required additional error estimation in the extended ranges of amplitudes and frequencies. 

resonant electric circuit, measurement of parameters, amplitude detector, error