The output of the zero crossing detector is differentiated by an RC circuit(RC<<T,where RC=time constant),so that the voltage V' is a series of positive and negative pulses.The negative portion is clipped off after passing through the diode and the waveform V∆ is shown.So,with the help of this circuit ,the sinusoid has been converted into a train of positive pulses of spacing T and may be used for triggering the monoshots,SCR,sweep voltage of CRT etc.
CIRCUIT WAVEFORMS:-
Blue colour----------->>>>>>> Input waveform(Sinusoidal signal)
Green colour---------->>>>>>>Output waveform(Square wave)
Orange colour--------->>>>>>Differentiated output( V')
Red colour-------------->>>>>>>Output pulses (V∆)
