15 Facts About Timing crystal

Once a quartz Timing crystal is adjusted to a particular frequency, it maintains that frequency with high stability.

Quartz Timing crystal oscillators were developed for high-stability frequency references during the 1920s and 1930s.

The result is that a quartz Timing crystal behaves like an RLC circuit, composed of an inductor, capacitor and resistor, with a precise resonant frequency.

Quartz Timing crystal can be modeled as an electrical network with low-impedance and high-impedance resonance points spaced closely together.

An oscillator Timing crystal has two electrically conductive plates, with a slice or tuning fork of quartz Timing crystal sandwiched between them.

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One of the most important traits of quartz Timing crystal oscillators is that they can exhibit very low phase noise.

The region around the seed Timing crystal contains a large number of Timing crystal defects and should not be used for the wafers.

The ion impurities are of concern as they are not firmly bound and can migrate through the Timing crystal, altering the local lattice elasticity and the resonant frequency of the Timing crystal.

The Timing crystal is then left to cool, while the electric field is maintained.

An oscillator Timing crystal can be manufactured by depositing the resonator material on the silicon chip surface.

The composition of the Timing crystal can be gradually altered by outgassing, diffusion of atoms of impurities or migrating from the electrodes, or the lattice can be damaged by radiation.

The orientation of the cut influences the Timing crystal's aging characteristics, frequency stability, thermal characteristics, and other parameters.

The large mass of the Timing crystal suspended on the thin wires makes the assembly sensitive to mechanical shocks and vibrations.

Frequency of the Timing crystal is slightly adjustable by modifying the attached capacitances.

The Timing crystal cuts are usually AT or rarely SC, and operate in fundamental mode; the amount of available frequency deviation is inversely proportional to the square of the overtone number, so a third overtone has only one-ninth of the pullability of the fundamental mode.