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What is a Clock Oscillator?

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Discover the differences between clock oscillators and crystal units and the features and applications of clock oscillators.



Crystal devices are used in a variety of electronic devices essential to our lives, from consumer electronics, automobiles, and communications equipment to transportation infrastructure, FA equipment, and medical equipment.
Among them, clock oscillators are easy to work with and particularly useful as frequency sources.

How Crystal Units Work

How crystal units work

Before getting into clock oscillators, let’s first give some background about “crystal units.”

A crystal unit is a "passive component" – meaning it does not operate on its own. Therefore, it controls various electronic devices using the piezoelectric phenomenon that causes strain and vibration when voltage is applied to a crystal.

In order to convert the mechanical vibration generated by the piezoelectric phenomenon into an electrical signal and obtain the frequency, an oscillation circuit that can continuously produce the frequency by oscillating a vibrator is required.



What are passive parts?
Components that consume, store, and release electrical energy supplied from the outside. Examples include resistance, capacitors, coils, etc.
In contrast, "active components" are capable of amplifying, rectifying, and converting supplied electrical energy. Examples of these include transistors, integrated circuits, etc.

Oscillator circuit

How to Make a Crystal Unit Oscillate

In order to generate oscillations, a matching process is required to match the oscillation circuit and the Rf *1, Rd *2, Cd, Cg *3 of the quartz crystal to suitable values for oscillation.

If the matching is insufficient, system failures such as frequency shift, abnormal oscillation, output level drop, and oscillation stop may occur.

*1 Rf=Feedback Resistor  *2 Rd=Power Limiting Resistor  *3 Cd,Cg=Load Capacity


Click here for information on Kyocera's matching service.

What is a Clock Oscillator?

Clock Oscillators

Clock oscillators are designed by crystal device manufacturers to provide customers with the best possible oscillation state by combining an oscillation circuit and a crystal resonator into a package.

By simply applying voltage, you get a clock signal of the desired frequency.



What is a Clock Signal?
A periodic electrical signal that “ticks” at regular intervals. This allows the timing of actuation to be synchronized among multiple electronic circuits.


Main Applications of Clock Oscillators

As noted above, clock oscillators are used in various electronic devices essential to our lives, from home appliances, automobiles, and communications equipment to transportation infrastructure, FA equipment, and medical equipment.

If you know what frequency you need, search for the optimal clock oscillator below.


Product Search  Series List

home appliances, automobiles
communications equipment, transportation infrastructure
FA equipment, and medical equipment

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For more information

Recommended Clock Oscillators: Z-Series Clock Oscillator


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