00.5 1 1.5 2 2.5 3 3.5 4 4.5 50 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Lesson 25 – Signals III (Section 5-5 and 5-7) (CLO 5-1 through 5-3) This is the last lesson of a three-lesson block on signals. This section focuses on composite signals and how to construct them using OrCAD and MATLAB. We start by discussing the various composite signals that can be constructed by combining the basic signals studied in the preceding two lessons. In particular we will look at the charging exponential, the double exponential, the damped ramp, and the decaying sinusoid. All four of these composite signals can represent input to circuits but more often are the transient response to circuits excited by unit steps that will be studied in Ch 7. It is useful to write the expression of the waveform for each and then show graphically how the two or three simple waveforms combine to produce the composite. . For example, ) ( ) ( t u e V t v T t -=-C 1 A V is composed of a step ) ( t
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