What is a crystal oscillator? What is its function?

A oven-controlled crystal oscillator uses a crystal that can convert electrical energy and mechanical energy back and forth to work in a resonant state, providing a stable and precise single-frequency oscillation. Under normal working conditions, the absolute accuracy of the frequency of a common oven-controlled crystal oscillator can reach 50 parts per million, and the accuracy of advanced ones is even higher. Some oven-controlled crystal oscillators can also adjust the frequency within a certain range by an external voltage, which is called a voltage-controlled crystal oscillator (VCXO).

The function of a oven-controlled crystal oscillator is to provide a basic clock signal for the system. Usually, a system shares one oven-controlled crystal oscillator to facilitate synchronization among all parts. Some communication systems use different oven-controlled crystal oscillators for the base frequency and the radio frequency, and keep them synchronized through electronic frequency adjustment methods.

oven-controlled crystal oscillators are usually used in conjunction with phase-locked loop circuits to provide the clock frequency required by the system. If different subsystems need clock signals of different frequencies, different phase-locked loops connected to the same oven-controlled crystal oscillator can be used to provide them.

What are the functions of the clock and the oven-controlled crystal oscillator? The function of the oven-controlled crystal oscillator is to provide a clock signal (a very stable frequency signal) to the single-chip microcomputer, enabling all internal components of the single-chip microcomputer to work synchronously, and also achieving synchronization when communicating with external devices.

Where is the oven-controlled crystal oscillator in the motherboard and what is its function? The function of the oven-controlled crystal oscillator: The more important oven-controlled crystal oscillators on the motherboard are the real-time oven-controlled crystal oscillator and the clock oven-controlled crystal oscillator. The real-time oven-controlled crystal oscillator provides the oscillation frequency, and almost all frequencies on the motherboard are based on the clock oven-controlled crystal oscillator. If it is damaged, the motherboard cannot work normally. The oven-controlled crystal oscillator, together with the clock chip, sound card chip, network card chip, graphics card, and other chips, forms an oscillation circuit and is an important source of clock signals on the entire board. Measurement of the oven-controlled crystal oscillator: voltage, motherboard power-on, use a multimeter to measure the voltage of the two pins of the oven-controlled crystal oscillator. Under normal circumstances, the voltages of the two pins will be different, which is called the voltage difference. Waveform: use an oscilloscope to measure the frequency and waveform. Resistance value: red pen to ground, black pen to measure the resistance value between the two pins.

What are the functions of the clock and the oven-controlled crystal oscillator? The function of the oven-controlled crystal oscillator is to provide a clock signal (a very stable frequency signal) to the single-chip microcomputer, enabling all internal components of the single-chip microcomputer to work synchronously, and also achieving synchronization when communicating with external devices.