Computer aided design of active ann passive analog filter and its applications

In this thesis; a computer programming related with realizations of required filters with the help of approximation procedures are presented. The program contains Butterworth, Chebyshev and Inverse Chebyshev approximations to realize the required LC filters. For the elliptic approximation, the zeros and denominator polynomials of the low-pass and high-pass filter transfer functions are obtained.Three types of approximations namely Butterworth, Chebeyshev, Inverse Chebeyshev will be used to get the realized network elements. For Elliptic approximation, the transfer function will be obtained. The characteristics of the specific filters; pass band frequency (wp), the maximum deviation of the magnitude characteristic (Kp), stop band frequency (ws), the minimum attenuation of the magnitude characteristic (Ks) and the type of approximation required will be entered to the computer program written in Visual C# by user, and the program will calculate the value of network elements that realize the specific filter. Also pole locations, quadratic factors and denominator coefficients of magnitude function used for approximation will be shown in the display.Key words: pass band frequency (wp), stop band frequency (ws), the maximum deviation of the magnitude characteristic (Kp), the minimum attenuation of the magnitude characteristic (Ks).