Usually we understand a rectangular (really trapezoidal) shaped waveform as a pulse. If my understanding is correct, a pulse is having both a rising and a falling edge. A capacitor discharge (an exponential decay waveform) is not usually understood as a pulse. The rising edge is expected as a turn-on and the falling edge is expected as a turn-off signal to some device. Thus pulses are supposed to work in the digital environment but the "pulse" of your signal stumps me!