The increasing complexity of electronical systems and the necessity of reducing the time spent for research and for design lead to development of computer aided simulation techniques. This paper present the way there can be used the software tools for analyzing the specific TV circuits, by describing the simulation for a PAL decoder, using PSPICE. The simulation of some specific TV circuit needs first to simulate the afferent signals. The final purpose of this program is the achievement of an optimal design. The program can run, without any modification, also in ORCAD 9, a more complex program.
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