Crystal Oscillator Is an Electronic Circuit That Can Generate An Electrical Signal By Using Vibrating Crystal Mechanical Resonance


Crystal Oscillator
Crystal Oscillator


Crystal oscillators are most often used in small electronic circuits, such as watches, clocks, and cellular phones. They are commonly used in measurement and test equipment. They are also used in military communication systems, GPS systems, electronic warfare systems, and space tracking. In these applications, they are referred to as time base oscillators. Using a oscillator provides precise timing for different operations in a digital circuit. It is the most important component of a clock circuit. It is used in the computer processor, as it provides the clock signal for synchronization with other peripherals. It can also be used as a reference oscillator for other parts.

The external circuit must have a frequency that is consistent with the resonant frequency of the crystal for operating a oscillator. The power consumption is controlled by the oscillator configuration. A silicon oscillator requires less than 2mA to operate at 4MHz. Additional current is required to drive LED indicators, active peripherals, or other circuits in some cases. The most common type of crystal oscillator is quartz. The quartz crystal is a device that is usually plated with electrodes. The crystal is then energized to produce a mechanical oscillation.

The Crystal Oscillator Market was valued at US$ 2,082.5 Mn in 2021 and is forecast to reach a value of US$ 2,898.33 Mn by 2030 at a CAGR of 4.0% between 2022 and 2030.

Ceramic resonant tanks are another type of mechanical resonant device. These are used in microprocessor applications and provide low-temperature coefficients. They typically require more current than quartz resonant tanks. However, they have good frequency stability. They are not sensitive to the amplifier selection. They have a tolerance of one percent of their nominal frequency. Crystal oscillators are very stable with temperature. However, their usage is not guaranteed beyond 85degC. This is due to the buildup of foreign material on the crystal, as well as the changes in the electronic components within the oscillator circuit.

Oscillator circuits must be carefully designed to avoid this problem. If the crystal has an effective load capacitance of 18pF, the output frequency must be within a few pF of that value. The capacitor values and other specifications are specified by the manufacturer. There are also constant-temperature ovens that can improve the oscillator.

There are other types of oscillators, such as RC oscillators, and these have less accuracy and have lower variation ranges, as these are based on capacitance, rather than resistance. They can be started quickly, however their performance is not as precise in the entire temperature range. Murata has built a new plant in Vantaa, in January 2020. The new plant is around 16,000 square meters and values almost EUR 42 million.


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