Question: The first step involved in building a digital clock is to take the 60-Hz signal and feed it into a Schmitt-trigger, pulse-shaping circuit* to produce

The first step involved in building a digital clock is to take the 60-Hz signal and feed it into a Schmitt-trigger, pulse-shaping circuit* to produce a square wave, as illustrated in Figure 7-3. The 60-Hz square wave is then put into a MOD-60 counter, which is used to divide the 60-Hz frequency by exactly 60 to produce a 1-Hz waveform. This 1-Hz waveform is fed to a series of counters, which then count seconds, minutes, hours, and so on. How many FFs are required for the MOD-60 counter?

Figure 7-3

60 Hz n Pulse shaper 0 60 Hz MOD-60 counter 1 Hz Counters, displays, etc.

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There is no integer power of 2 that will equal 60 The closest is 2 6 64 ... View full answer

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