Everything You Need to Know and More About Crystal Oscillators
It is important that you have a good understanding about how crystal oscillators work. 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 physical characteristics that are present in the crystals such as quartz are what help determine that frequency for this particular electronic circuit that will be placed in the circuit feedback loop.
There are a number of functions that these so-called crystal oscillators bring. Such circuits are best used for purposes that involve communications as well as electronics. 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. Time frequency generators have become more stable through them. Such generators will then be utilized in pilot and carrier signals that will be great for use among navigation and 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. Having reference signals is what you can expect from these circuits as well that help in a wide variety of systems with their special purposes. The required stability and accuracy of the output frequency of these crystal oscillators will depend on their purpose. 1000 PPM is the frequency range that usually begins with the clocks that only make use of simple microprocessors. When it comes to applications that must need frequency control, less than 5 PPM of frequency is needed.
A feedback network and an amplifier are the two things that you can expect from crystal oscillators. This feedback network which it contains takes charge in selecting what output of the amplifier must be returned back to its input. There are two key factors that affect how oscillator circuits work. The first one is where the gain loop should be having losses around the oscillator loop that is greater or can be equal to the unity. The phase shift of the loop being equal to 360 or 0 degrees is the second factor. The angle shifts of the loop phase are the ones that determine how much frequency is needed for the crystal oscillator 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. Having a quartz crystal in place in the feedback loop aids in being able to reduce shifts in net phase.
The use of crystals in these crystal oscillators has become very much beneficial in actual applications include excellent processing ability and high frequency stability and stable temperature characteristics. Moreover, there is a high degree of accuracy as well as stability of frequency in crystal oscillators.