TOP MENUHow a clock generator works, Quartz crystal |
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■What is a Clock Generator
A clock generator is a circuit that allows a CPU to generate a clock signal.
The clock frequency is the frequency at which this clock signal is generated, and the higher the clock frequency, the faster the calculations that can be performed.
A clock generator is broadly divided into the following two circuits. ■NOT Circuit
A NOT circuit is a logic circuit that outputs 1 when 0 is input, and outputs 0 when 1 is input, as shown below. ■Quartz crystal
A NOT circuit alone cannot adequately control the clock frequency.
That's where a quartz crystal oscillator comes in. A quartz crystal oscillator is an element that uses the piezoelectric effect to generate voltage oscillations.
When alternating low and high voltages are applied to a thin-film quartz crystal, it vibrates, generating voltage oscillations.
The desired clock frequency can also be achieved by changing the thickness of the quartz crystal film.
Below is a simplified diagram of a clock generator that combines a NOT circuit and a quartz crystal oscillator.
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