
CHAPTER 24
Non-sinusoidal Signal Amplification
24.1 Waveforms
Up to the last chapter, 'signals' were normally sinusoidal. That
chapter was an introduction to applications in which sine waves
hardly appear, except as radio carrier waves used to carry extremely
non-sinusoidal forms. Most of these are of two main kinds. There is
the pulse, which is often made to recur at regular intervals, as in
Fig. 24. la. If the pulses and intervals are equal, or nearly so, as at 6,
(a)
(b)
(c)
Fig. 24.1 Examples of the most important non-sinusoidal wave-forms: (a) narrow
pulse, [b) square wave and (c) ramp or sawtooth
they are commonly called square waves