A waveform in which the variable increases uniformly with time for a fixed period, drops sharply to its initial value, and then repeats the sequence periodically. The illustration shows the ideal waveform and the waveform generated by practical electrical circuits. Sawtooth generators are frequently used to provide a time base for electronic circuits, as in the cathode-ray oscilloscope.
Sawtooth waveform.
A periodic repetitive waveform that is constrained to lie between a maximum and a minimum value. Between these limits the waveform alternately rises and falls linearly with time. The slope of one of the edges of the waveform is made very much steeper than the other, and the waveform thus appears as a repetitive series of linear ramps. Compare triangular waveform.
A periodic waveform whose amplitude varies approximately linearly between two values, the time taken in one direction, the active interval, being very much greater than the time taken in the other. The shorter period is termed the flyback. An ideal sawtooth waveform is linear with a sharp change of direction; in practice this is not achieved (see diagram) and the transition stage departs from linearity, often with a short unwanted inactive interval before the next cycle. Sawtooth waveforms are commonly produced by suitably designed relaxation oscillators and are frequently used to provide a timebase.
Sawtooth waveform
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