A shift register is often used as a way to delay a digital signal by an integral number of clock cycles. The digital signal is applied to the shift register’s serial input and is shifted through the shift register by successive clock pulses until it reaches the end of the shift register, where it appears as the output signal. This method for delaying the effect of a digital signal is common in the digital communications field. For instance, the digital signal might be the digitized version of an audio signal that is to be delayed before it is transmitted. The input waveforms given in Figure 7-70 are applied to a 74HC166. Determine the resultant output waveform.

Fiure 7-70

CLK CLR SER QH CLK- 0 1 - CLR - CLR SER SER CLK CLK INH SH/LD 00000000 A B C D E F G H 74HC166 QH QH 111 112 113 114 115 T