{"id":2279,"date":"2021-01-18T19:54:34","date_gmt":"2021-01-18T17:54:34","guid":{"rendered":"http:\/\/journals.khnu.km.ua\/vestnik\/?p=2279"},"modified":"2021-02-16T13:26:57","modified_gmt":"2021-02-16T11:26:57","slug":"%d0%b4%d0%be%d1%81%d0%bb%d1%96%d0%b4%d0%b6%d0%b5%d0%bd%d0%bd%d1%8f-%d1%81%d1%85%d0%b5%d0%bc%d0%bd%d0%b8%d1%85-%d1%80%d1%96%d1%88%d0%b5%d0%bd%d1%8c-%d0%b0%d0%bc%d0%bf%d0%bb%d1%96%d1%82%d1%83%d0%b4","status":"publish","type":"post","link":"https:\/\/journals.khnu.km.ua\/vestnik\/?p=2279","title":{"rendered":"\u0414\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043d\u044f \u0441\u0445\u0435\u043c\u043d\u0438\u0445 \u0440\u0456\u0448\u0435\u043d\u044c \u0430\u043c\u043f\u043b\u0456\u0442\u0443\u0434\u043d\u0438\u0445 \u0434\u0435\u043c\u043e\u0434\u0443\u043b\u044f\u0442\u043e\u0440\u0456\u0432 \u0430\u0432\u0442\u043e\u0434\u0438\u043d\u043d\u0438\u0445 \u0441\u043f\u0456\u043d-\u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u0456\u0432"},"content":{"rendered":"

<\/p>\n

\u0414\u041e\u0421\u041b\u0406\u0414\u0416\u0415\u041d\u041d\u042f \u0421\u0425\u0415\u041c\u041d\u0418\u0425 \u0420\u0406\u0428\u0415\u041d\u042c \u0410\u041c\u041f\u041b\u0406\u0422\u0423\u0414\u041d\u0418\u0425 \u0414\u0415\u041c\u041e\u0414\u0423\u041b\u042f\u0422\u041e\u0420\u0406\u0412 \u0410\u0412\u0422\u041e\u0414\u0418\u041d\u041d\u0418\u0425 \u0421\u041f\u0406\u041d-\u0414\u0415\u0422\u0415\u041a\u0422\u041e\u0420\u0406\u0412<\/p>\n

A STUDY OF SCHEME SOLUTIONS OF THE AMPLITUDE DEMODULATORS OF MARGINAL OSCILLATORS<\/p>\n

 
\n<\/a>
\n\u0421\u0442\u043e\u0440\u0456\u043d\u043a\u0438: 63-69. \u041d\u043e\u043c\u0435\u0440: \u21164, 2020 (287)<\/strong><\/p>\n

\u0410\u0432\u0442\u043e\u0440\u0438:<\/strong>
\n\u0410.\u041f. \u0421\u0410\u041c\u0406\u041b\u0410, \u041e.\u0412. \u0413\u0420\u0415\u0421\u042c, \u0422.\u0410. \u041a\u0410\u0417\u0415\u041c\u0406\u0420\u0421\u042c\u041a\u0418\u0419
\n\u0427\u0435\u0440\u043d\u0456\u0432\u0435\u0446\u044c\u043a\u0438\u0439 \u043d\u0430\u0446\u0456\u043e\u043d\u0430\u043b\u044c\u043d\u0438\u0439 \u0443\u043d\u0456\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442 \u0456\u043c\u0435\u043d\u0456 \u042e\u0440\u0456\u044f \u0424\u0435\u0434\u044c\u043a\u043e\u0432\u0438\u0447\u0430<\/p>\n

\u0410. SAMILA, \u041e. HRES, T. KAZEMIRSKIY
\nYuriy Fedkovych Chernivtsi National University<\/p>\n

 
\nDOI:<\/strong> https:\/\/www.doi.org\/10.31891\/2307-5732-2020-287-4-63-69<\/a>
\n <\/p>\n

\u0420\u0435\u0446\u0435\u043d\u0437\u0456\u044f\/Peer review : <\/strong>15.09.2020 \u0440.
\n\u041d\u0430\u0434\u0440\u0443\u043a\u043e\u0432\u0430\u043d\u0430\/Printed : <\/strong>02.11.2020 \u0440.<\/p>\n

 <\/p>\n

\u0410\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u043c\u043e\u0432\u043e\u044e \u043e\u0440\u0438\u0433\u0456\u043d\u0430\u043b\u0443<\/strong><\/p>\n

\u00a0 \u00a0 \u0412 \u0440\u043e\u0431\u043e\u0442\u0456 \u043e\u043f\u0438\u0441\u0430\u043d\u043e \u0437\u0430\u0441\u0442\u043e\u0441\u0443\u0432\u0430\u043d\u043d\u044f SPICE-\u043c\u043e\u0434\u0435\u043b\u044e\u0432\u0430\u043d\u043d\u044f \u0434\u043b\u044f \u0434\u043e\u0441\u043b\u0456\u0434\u0436\u0435\u043d\u043d\u044f \u0430\u043c\u043f\u043b\u0456\u0442\u0443\u0434\u043d\u0438\u0445 \u0434\u0435\u043c\u043e\u0434\u0443\u043b\u044f\u0442\u043e\u0440\u0456\u0432 \u0430\u0432\u0442\u043e\u0434\u0438\u043d\u043d\u0438\u0445 \u0441\u043f\u0456\u043d-\u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u0456\u0432. \u0410\u043c\u043f\u043b\u0456\u0442\u0443\u0434\u043d\u0430 \u0434\u0435\u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0456\u044f \u043d\u0430 \u043d\u0435\u043b\u0456\u043d\u0456\u0439\u043d\u043e\u043c\u0443 \u0435\u043b\u0435\u043c\u0435\u043d\u0442\u0456 \u0434\u043e\u0441\u0438\u0442\u044c \u043f\u043e\u0448\u0438\u0440\u0435\u043d\u0430 \u0432 \u043c\u0435\u0442\u043e\u0434\u0438\u0446\u0456 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0456 \u043d\u0435\u043f\u0435\u0440\u0435\u0440\u0432\u043d\u043e\u0433\u043e \u0441\u043f\u043e\u0441\u0442\u0435\u0440\u0435\u0436\u0435\u043d\u043d\u044f \u044f\u0434\u0435\u0440\u043d\u043e\u0433\u043e \u043a\u0432\u0430\u0434\u0440\u0443\u043f\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u0440\u0435\u0437\u043e\u043d\u0430\u043d\u0441\u0443. \u041f\u0440\u0438 \u0446\u044c\u043e\u043c\u0443 \u0430\u043a\u0442\u0438\u0432\u043d\u0438\u0439 \u0435\u043b\u0435\u043c\u0435\u043d\u0442 \u0454 \u043e\u0441\u043d\u043e\u0432\u043e\u044e \u0430\u0432\u0442\u043e\u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u043d\u043e\u0433\u043e \u043a\u0430\u0441\u043a\u0430\u0434\u0443 \u0456 \u0447\u0430\u0441\u0442\u043e \u043f\u043e\u0454\u0434\u043d\u0443\u0454 \u0432 \u0441\u043e\u0431\u0456 \u0444\u0443\u043d\u043a\u0446\u0456\u0457 \u0433\u0435\u043d\u0435\u0440\u0443\u0432\u0430\u043d\u043d\u044f, \u043f\u0456\u0434\u0441\u0438\u043b\u0435\u043d\u043d\u044f \u0442\u0430 \u0434\u0435\u0442\u0435\u043a\u0442\u0443\u0432\u0430\u043d\u043d\u044f. \u0415\u043a\u0441\u043f\u0435\u0440\u0438\u043c\u0435\u043d\u0442\u0430\u043b\u044c\u043d\u043e \u0432\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043e, \u0449\u043e \u043f\u0440\u0438 \u0430\u043c\u043f\u043b\u0456\u0442\u0443\u0434\u043d\u0456\u0439 \u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0456\u0457 40 % \u0442\u0430 \u0437\u043c\u0456\u043d\u0456 \u0432\u0445\u0456\u0434\u043d\u043e\u0457 \u043d\u0430\u043f\u0440\u0443\u0433\u0438 \u0432 \u0434\u0456\u0430\u043f\u0430\u0437\u043e\u043d\u0456 20\u20131000 \u043c\u0412, \u0441\u0445\u0435\u043c\u0430 \u0441\u0438\u043c\u0435\u0442\u0440\u0438\u0447\u043d\u043e\u0433\u043e \u0441\u043f\u0456\u043d-\u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u0430 \u0437 \u043b\u0456\u043d\u0456\u0439\u043d\u0438\u043c \u0430\u043a\u0442\u0438\u0432\u043d\u0438\u043c \u0434\u0435\u043c\u043e\u0434\u0443\u043b\u044f\u0442\u043e\u0440\u043e\u043c \u0437\u0430\u0431\u0435\u0437\u043f\u0435\u0447\u0443\u0454 \u043a\u0440\u0430\u0449\u0443 \u043b\u0456\u043d\u0456\u0439\u043d\u0456\u0441\u0442\u044c \u043f\u0435\u0440\u0435\u0434\u0430\u0442\u043e\u0447\u043d\u043e\u0457 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u043d\u0456\u0436 \u0441\u0445\u0435\u043c\u0438 \u0430\u0441\u0438\u043c\u0435\u0442\u0440\u0438\u0447\u043d\u0438\u0445 \u0441\u043f\u0456\u043d-\u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u0456\u0432 \u0437 \u0442\u0440\u0430\u043d\u0437\u0438\u0441\u0442\u043e\u0440\u043d\u0438\u043c\u0438 \u0447\u0438 \u0434\u0456\u043e\u0434\u043d\u0438\u043c\u0438 \u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440\u0430\u043c\u0438.
\n\u041a\u043b\u044e\u0447\u043e\u0432\u0456 \u0441\u043b\u043e\u0432\u0430:<\/strong> \u044f\u0434\u0435\u0440\u043d\u0438\u0439 \u043a\u0432\u0430\u0434\u0440\u0443\u043f\u043e\u043b\u044c\u043d\u0438\u0439 \u0440\u0435\u0437\u043e\u043d\u0430\u043d\u0441, \u0441\u043f\u0456\u043d-\u0434\u0435\u0442\u0435\u043a\u0442\u043e\u0440, \u0430\u043c\u043f\u043b\u0456\u0442\u0443\u0434\u043d\u0430 \u0434\u0435\u043c\u043e\u0434\u0443\u043b\u044f\u0446\u0456\u044f, SPICE-\u043c\u043e\u0434\u0435\u043b\u044e\u0432\u0430\u043d\u043d\u044f.<\/p>\n

 <\/p>\n

\u0420\u043e\u0437\u0448\u0438\u0440\u0435\u043d\u0430 \u0430\u043d\u043e\u0442\u0430\u0446\u0456\u044f \u0430\u043d\u0433\u043b\u0456\u0439\u0441\u044c\u043a\u043e\u044e \u043c\u043e\u0432\u043e\u044e<\/strong><\/p>\n

\u00a0 \u00a0 There are continuous-wave and pulsed methods for monitoring NQR signals in the frequency range from ~ 2 to 1000 MHz. Although modern radio spectrometers use the pulsed method of recording resonant signals, the method of continuous-wave detection of spin resonances is still quite relevant in the technique of continuous spectroscopy, in particular, especially for NQR. In this case, the active element is the basis of the self-oscillating circuit and often combines the functions of generation, amplification, and detection. The paper describes the application of SPICE modelling for the study of amplitude demodulators of the marginal oscillators. Amplitude demodulation on a nonlinear element is quite common in the method based on continuous observation of nuclear quadrupole resonance. To synthesize the optimal version of the amplitude circuit Demodulators on the field-effect transistor and diode and study its characteristics, their SPICE modelling in the computer-aided design system Cadence OrCAD was carried out, the Linear active amplitude demodulator on the operational amplifier was considered. It is experimentally established that at amplitude modulation of 40% and change of input voltage in the range of 20 – 1000 mV, the scheme of the symmetric marginal oscillator with linear active demodulator provides better linearity of transfer characteristic than schemes of asymmetric marginal oscillators with transistor or diode detectors (the total harmonic distortion of the output voltage did not exceed 0.5%).
\n\u00a0Keywords:<\/strong> Nuclear quadrupole resonance, marginal oscillator, amplitude demodulation, SPICE modelling.<\/p>\n

 <\/p>\n

References<\/strong><\/p>\n

    \n
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