The response of a linear network to a FM wave

Includes bibliographical references (pages 115-118)Several techniques for calculating the response of a network to variable - frequency excitation is examined and their suitability for computer automated problem solving are discussed. The dynamic or operational approach is shown to have several disadvantages that severely limit its usefulness and its form is found to be difficult to implement into a general program that may be used on a computer to solve a large variety of problems. The Fourier or spectral approach to arriving at a solution is shown to possess several desirable features that lend it ideally to computer implementation. A computer program is developed from the Fourier approach and is used to investigate the FM response of a single -pole filter and three common types of two-pole filters. The distortion in the FM wave produced by these filters is calculated for a wide range of modulation indexes. The quasi-stationary approximation, a special case of the dynamic approach, is compared to the Fourier solution for the case of the single - pole filter. The effects of sideband clipping are also presented. A general technique for computer-aided problem solving is described and the required programming is presented. The approach is explained in sufficient detail to allow its use by anyone who is familiar with the use of a computer and has a fair knowledge of programming