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How do you calculate the change of frequency of a quartz crystal by applying pressure on the crystal?
you compress and release the pressure on the quartz buy changing the electrical polarity (force) the speed of sound in the crystal determines the frequency so for about 1000 ft / second if the quartz is about .01' 1/8" thick you get about 100khz applying more pressure increases the amplitude making the frequency lower too much power (force, pressure) you will break the crystalo
Why piezo crystal oscillator used?
Piezo-electric quartz crystals are used to define the frequency in a crystal-controlled oscillator. Quartz is a hard material that tends to oscillate mechanically at a high frequency (up to about 20 MHz) when maintained by the maintaining amplifier. The signal produced is far more stable and predictable than an L-C oscillator, especially when the crystal is placed in a dedicated oven with a controlled temperature.
What type of oscillator has got frequency stability?
A: desirable oscillator will have no frequency deviation as a function of external influences such as temperature and more. Stability is measured as a % factor considering outside interferences
Explain the working of piezeoelectric oscillator?
A piezo-electric material is one who's physical dimensions (size) noticeably change when a current is passed through it. So if an AC (alternating current) is passed through a piezo-electric material, it itself alternates, or oscillates. This type of material is exploited in Electron Microscopes and Atomic Force Microscopes, which is how they are able to get such small, yet precise images.
What are oscillator crystals made out of?
Any where a stable desired frequency is needed. Crystal Oscillators are quite accurate, they are used in computers as well as wrist watches.They use a mechanical oscillatory force that is induced by an electric charge on a piezoelectric substance at resonance.en.wikipedia.org/wiki/Piezoelectricity~MECHASUN~
How rapidly does Quartz vibrate?
Quartz vibrates when a voltage is applied between opposite faces of a crystal. The frequency of the vibration depends on the thickness of the crystal, and on the direction of the faces compared to the natural planes in the crystal structure.
Why is quartz used in so many electronic devices?
When a tiny alternating voltage is applied across a quartz crystal it oscillates very precisely. The oscillations can therefore be used as a clock.
Quartz crystal in quartz watches work on the principle?
Quartz crystal in quartz watches works on the principle of piezoelectric effect, where the crystal vibrates at a specific frequency when an electric current is applied. This vibration is incredibly regular and precise, allowing the watch to keep accurate time. The circuit in the watch counts the vibrations of the crystal to track the passage of time.
How much voltage a piezoelectric crystal can produce?
The current will depend on external resistance - far better to consider total energy, conversion efficiency, or failing that, voltage. The answer will depend on device size anyway.
How do quartz watches work?
Quartz watches use a small piece of crystal quartz that vibrates at a specific frequency when an electric current is applied to it. This vibration is then converted into a steady pulse that drives the movement of the watch hands. The precision of the quartz crystal allows for accurate timekeeping compared to mechanical watches that rely on gears and springs.
How does quartz clock movement work?
A quartz clock operates by a piece of quartz crystal. The crystal's wavelength gives off a signal which is read by a digital logic circuit. This signal is then translated into increments of time. The digital data is converted to hours, minutes and seconds.
Why are quartz watches so accurate?
bcoz as d electronic watches now available use vibration of a crystal of a substance called quartz to mesure time . d frequency of da vibrting quartz crystal in side these cloks n' watches is so regular dat dey lose or gain only 1s every10 years......to take mor information go to SHARMISHTA MAAM OF CLASS 5B DPS KALINGA ODISHA.....BY KALPAM NAYAK class 7aDelhi Public School Kalingaodisha
Is there a vibration frequency associated with quartz crystal?
Yes. When quartz is cut in a thin sheet and voltage is applied to its opposite faces, it has a very precise and constant frequency that depends on its thickness. Quartz crystals are widely used as stable frequency references in electronic circuits in radio transmitters, receivers, and TV subsystems.
Why do they use quartz in a cell phone?
Because quartz vibrates at a fixed frequency when an electrical current is applied (32,768 Hz) The quartz crystal keeps the phone's clock & calendar accurate, and also provides the 'base' frequency for phone-calls.
Clear type of quartz?
A clear type of quartz is known as rock crystal. It is a colorless variety of quartz that is transparent and often used in jewelry and crystal healing practices.
What is the technology of quartz crystal timepieces?
This site will give you excellent information, here is an excerpt and the site:Enter the Quartz Clock. Quartz timepieces use the nature of the quartz crystal to provide a very accurate resonator which gives a constant electronic signal for timekeeping purposes. Quartz crystals are piezoelectric, which means that they generate an electrical charge when mechanical pressure is applied to them. They also vibrate if an electrical charge is applied to them. The frequency of this vibration is a function of the cut and shape of the crystal. Quartz crystals can be cut at a consistent size and shape to vibrate at thousands of times per second, making them extremely stable resonators for keeping very accurate time.* http://www.physlink.com/Education/AskExperts/ae559.cfm
Is amethyset a crystal?
Amethyst is a variety of crystal quartz.
