Browsing by Subject "oscylatory harmoniczne"

Now showing 1 - 1 of 1

Access status: Open Access ,
Sterowane cyfrowo oscylatory z wykorzystaniem transmitancji rzeczywistych wzmacniaczy operacyjnych
(Data obrony: 2011) Płaza, Mirosław
The PhD thesis is devoted to designing the active harmonic oscillator circuits, the parameters of which can be controlled by a digital way. General concepts presented in the thesis were verified by means of designing and testing a sample oscillation circuits. For the designed circuits the tests of amplitude relation to the frequency of the harmonic oscillations was carried out, and the sample oscillograms generated were presented. Also conditions of oscillation and influence of the resolution of the DACs applied on the scope of changes in the frequency of the controlled oscillator were tested. Another value verified was the Total Harmonic Distortion index. The test results were verified using two different methods, in which the values obtained by theoretical computing were confirmed with numerical simulations in PSpice programme. The basic advantage of the proposed solutions when compared with other models described in reference works is using only active components. Another advantage of the solutions presented is the possibility to implement them in electronic integrated circuits technology. For example, the suggested circuits may be used in CMOS technology where the only components are insulated-gate field-effect transistors with n or p channels, which can be used for constructing various amplifiers and switches.