Quartz Crystal Resonator

A quartz crystal resonator is a passive piezoelectric component used in electronic circuits to provide a stable and precise frequency reference. It is classified as a component within the Computer, Electronic and Optical Product Manufacturing industry. The resonator consists of a precisely cut quartz crystal with electrodes deposited on its surfaces, typically made of silver or gold, and is enclosed in a ceramic or metal housing for protection and mounting. When an alternating voltage is applied across the electrodes, the piezoelectric effect induces mechanical vibrations in the crystal at its natural resonant frequency. These vibrations, in turn, generate electrical oscillations at that same frequency, which can be used to stabilize the output of an oscillator circuit. The resonant frequency is determined by the crystal's physical dimensions and cut, and it is specified in megahertz (MHz) as a range. This component is critical for timing and frequency control in applications such as microprocessors, communication devices, and consumer electronics. It is important to note that the actual resonant frequency and performance characteristics must be verified for the specific model and application, as the listed frequency range is a general reference. The resonator does not include any active circuitry; it relies on external oscillator circuits to sustain oscillations. Proper handling and mounting are essential to avoid frequency drift or damage. For procurement, engineers should confirm the exact frequency, load capacitance, and package type with the manufacturer or supplier, as these parameters affect circuit design. The component is not certified to any specific standard unless explicitly stated by the manufacturer, and any claimed compliance should be verified with the supplier.

When an alternating voltage is applied to the electrodes on the quartz crystal, the piezoelectric effect causes the crystal to mechanically deform and vibrate at its natural resonant frequency. This mechanical vibration is converted back into an electrical signal, creating stable oscillations. The frequency of these oscillations is highly stable due to the crystal's precise physical properties. The resonator is typically used in an oscillator circuit that amplifies and sustains the oscillations. The frequency range is specified in MHz, but the exact frequency depends on the crystal's cut and dimensions. The housing protects the crystal from environmental influences, and the electrode material affects long-term stability. For proper operation, the circuit must be designed to match the crystal's load capacitance and drive level.