017149

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Crystals

Crystals refer to materials in which the atoms are arranged in a regular and ordered way. They are solid substances that are composed of three dimensional network of ions, atoms or molecules. Crystals have been used for various applications since ancient eras and has emerged as a key element in wide range of modern electrical and optical applications. In this article we will try to cover the scope and working principles of a crystal type \'017149\' and the applications in which it can be used.

017149 Application Field

017149 crystals are a type of quartz crystals used for frequency control applications in various electronic devices. It is composed of two 4-inch round plates of 172 inner electrodes and 960 outer electrodes connected to a single piece of crystal. A thin film of lithium-niobate is also applied between the layers of electrodes. This crystal type is known for its low temperature drift and low tolerance variation characteristics. It is widely used as a frequency control element in the following areas:

• Radio Communications Systems: It is used as the frequency control element in narrowband systems and wideband Systems such as broadcast FM-AM radio, television broadcast, citizen band radio, satellite communications and radio navigation.
• Automatic Frequency Control Systems: It is used to maintain the frequency of oscillator signals over wide temperature ranges. In this application a well tuned oscillator circuit is required for the oscillator to function properly.
• Synthesizers: It is used for frequency generation pattern calibration in multiple frequency synthesizers such as mobile phone base station controller.
• Time and Frequency Standards: It is used as an accurate reference oscillator for frequency control systems in instrumentation and control systems, medical electronics and industrial automation.
• Electronic Test Equipment: It is used in frequency measurement applications, digital oscilloscope and signal generators.

017149 Working Principle

The working principle of the 017149 crystal can be explained with the help of the following diagram:

In this diagram, the crystal plate is connected to two electrodes a and b. When a voltage is applied to the crystal plate, a piezoelectric effect is induced in the crystal lattice due to the presence of an electric field. This produces an oscillating pressure wave that travels through the crystal lattice. When the wave reaches an electrode it is converted back into an electric signal. This induced electric signal is fed back to the electrodes a and b and amplifies the electric field thus creating a feedback loop. This results in a resonant frequency, which is proportional to the applied voltage and determined by the physical properties of the crystal.

Conclusion

The 017149 is a quartz crystal used for frequency control applications. It is known for its low temperature drift and low tolerance variation characteristics, making it an ideal choice for various frequency control applications such as radio communications systems, automatic frequency control systems, synthesizers, time and frequency standards and electronic test equipment. It works on a principle of resonance, whereby the frequency is determined by the physical properties of the crystal. Thus, the 017149 crystal is an essential factor in the wide range of modern technological advancements.

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