![]() Hence it is important that the precision of timescale is good enough to represent a clock period. Simulations are required to operate on a given timescale that has a limited precision as specified by the timescale directive. For example, another clock of the same time period that is shifted to the right by 1/4th of its period can be said to be at 90 deg in phase difference. If one cycle of a clock can be viewed as a complete circle with 360 deg, another clock can be relatively placed at a different place in the circle that occupy a different phase. The amount of time the clock is high compared to its time period defines the duty cycle. And hence the clock period is the time taken to complete 1 cycle. ![]() The frequency indicates how many cycles can be found in a certain period of time. The key properties of a digital clock are its frequency which determines the clock period, its duty cycle and the clock phase in relation to other clocks. Clocks are fundamental to building digital circuits as it allows different blocks to be in sync with each other. ![]()
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