When designing a digital clock system using 60 Hz line frequency, the first two major stages should include:
A) a pulse shaper circuit and a BCD counter.
B) a pulse shaper circuit and a MOD 60 counter.
C) a MOD 60 counter and BCD counter.
D) a MOD 2 and BCD counter.

Question

Quizplus · Accepted Answer

The first stage, a pulse shaper circuit, is used to convert the 60 Hz sine wave from the line frequency into a square wave suitable for digital circuits. The second stage, a MOD 60 counter, counts the pulses to keep track of seconds, as there are 60 seconds in a minute, making it essential for a digital clock system.

When Designing a Digital Clock System Using 60 Hz Line