What is a piezoelectric crystal oscillator?

What is a piezoelectric crystal oscillator?

A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a constant frequency. Quartz crystals are manufactured for frequencies from a few tens of kilohertz to hundreds of megahertz.

What are the applications of crystal oscillator?

They are widely used in computers, instrumentation, digital systems, in phase-locked loop systems, modems, marine, telecommunications, in sensors and also in disk drives. Crystal Oscillator is also used in engine controlling, clock and to trip computer, stereo, and in GPS systems.

How does Hartley oscillator work?

Hartley Oscillator is a device that generates oscillatory output (sinusoidal). It consists of an amplifier linked to an oscillatory circuit, also called LC circuit or tank circuit. The function of tank circuit is to tune a certain frequency. LC oscillators are designed to operate in the radio-frequency range.

What is the main advantage of crystal oscillators?

The crystal oscillators have very high frequency stability. The crystal oscillator is possible to obtain very high precise and stable frequency of oscillators. It has High frequency of operation. It has very low frequency drift due to change in temperature and other parameters.

How can I test my crystal at home?

You can test if your crystals have been dyed by:

1. Dabbing nail polish remover on a cotton bud and wiping this on the crystal.
2. Scratching the crystal with something that is high on the Mohs scale (make sure you scratch with a material higher than what the crystal to test is).

What is the difference between a digital and a USB oscilloscope?

It is also interesting to note that many boxed digital oscilloscopes adopt exactly the same approach and have the same basic circuit blocks, the only real difference is that the USB scope uses an external PC or other computer for the control and display. One of the key elements of the PC oscilloscope is naturally the USB link.

What is the frequency range of the oscilloscope?

This Oscilloscope has a frequency range of: 20Hz to 20 kHz (complying with the Soundcard capability). 3. The value of 22K Resistor could be increased up to 820K Ohm for the use of Oscilloscope with an input of above 5 volt.

What is the frequency of oscillations in a Hartley oscillator?

Frequency of oscillations: = = ++ 17 BJT based Hartley Oscillator 18 D. Crystal Oscillators The crystal appears to the rest of the circuit as a resonant circuit.

What is the frequency range of an oscillator crystal?

Overtone crystals normally cover the range 15 MHz to 150 MHz. Oscillators that never make use of tuned circuits are often very useful, whether as ‘crystal checkers’ or any different reason. Especially for LF crystals, tuned circuits could be rather huge. On the other hand, they usually are not without their own traps.