Title :
Effective approximation of transfer characteristics of low frequency amplifier
Author :
Novak, Martin ; Kosek, Miloslav ; Eichler, Jakub
Author_Institution :
Dept. of Mechatron. & Tech. Inf., Tech. Univ. in Liberec, Liberec, Czech Republic
Abstract :
A detailed knowledge of amplifier transmission characteristics is important in many technical areas, for instance in commercial modeling systems as the Simulink. The paper shows that a good approximation of measured amplitude and phase characteristics can be made numerically by a rational function. If there is enough computation time, the complex transfer characteristic can be well approximated. Then zeros and poles can be found. Preliminary calculation reveals that the tested amplifier is not a minimum phase network.
Keywords :
amplifiers; approximation theory; Simulink commercial modeling systems; amplifier transfer characteristic effective approximation; amplitude characteristics; low frequency amplifier; minimum phase network; phase characteristics; rational function; zeros and poles; Frequency measurement; Function approximation; Least squares approximations; Phase measurement; Poles and zeros; Polynomials; Approximation of characteristic; Hilbert transform; Minimum phase network; Rational function; Transmission function; Zeros and poles;
Conference_Titel :
Applied Electronics (AE), 2014 International Conference on
Conference_Location :
Pilsen
Print_ISBN :
978-8-0261-0276-2
DOI :
10.1109/AE.2014.7011708
