Pulse and Digital Circuits

1.12 CHARACTERISTICS OF PULSE WAVEFORMS

Consider the waveform (a pulse train) where the pulse amplitude is positive, as shown in Fig. 1.56.

The voltage level of the top of the pulse with respect to the ground is the pulse amplitude. The first edge of the pulse at t = 0 (say) is called the leading edge, the rising edge or positive going edge. The second edge, at t = T₁, is called the trailing edge, the falling edge or the negative going edge. The time interval from the leading or trailing edge of one pulse to the leading or trailing edge of the next pulse is the time period T. The reciprocal of the time period is the pulse repetition frequency (PRF). The time interval from the leading edge to the trailing edge of a pulse is called the pulse width, ...