Fast Facts About Crystal Oscillators
Before you get to use crystal oscillators, you have to first know what their functions are. When it comes to these crystal oscillators, you should understand that at specific frequencies, they will be able to produce electrical oscillations being the electronic circuits that they are. The frequency that is designed in the process can be determined by what physical characteristics quartz has and other crystals that is found in the circuit feedback loop.
There are a number of functions that these so-called crystal oscillators bring. For both communication and electronic systems, you can use these circuits. Basically, any systems where their function depends greatly on the accuracy of coordination and time measurement will be making the most of this particular type of circuit. You can expect more stable time frequency generators all because of these circuits. For these generators, pilot and carrier signals are what they can provide for effective navigation as well as electronic communication systems. Having clock signals for use among data processing equipment is also one of the best things about the use of these crystal oscillators. They can also provide references signals that are used for specialized systems. The required stability and accuracy of the output frequency of these crystal oscillators will depend on their purpose. For simple microprocessor clocks, the frequency can start at 1000 PPM. On the other hand, about less than 5 PPM is required when it comes to applications that need to utilize very precise control of the frequency.
A feedback network and an amplifier are the two things that you can expect from crystal oscillators. The role of the feedback network is to be choosing parts of the output produced by the amplifier that must be returned back to the amplifier input. The circuit in oscillators is usually dependent on two key factors. Firstly, the gain loop must be equal to the unity or be greater than what the oscillator loop will be losing. The phase shift of the loop being equal to 360 or 0 degrees is the second factor. In simple terms, angle shifts that happen in loop phase are telling of the frequency that is required for these crystal oscillators to work. Causing some change in the angle of the net loop phase will always result to have even a slight change on the output frequency that the oscillator circuit gives off. If you want to make sure that your net phase shifts are minimized, you must make sure that in your feedback loop, you will have a quartz crystal inside.
With crystals having stable temperature and high frequency stability characteristics and processing ability, there is no doubt that using crystal oscillators is very much beneficial. Furthermore, crystal oscillators are well known for having high frequency stability and accuracy.