Crystal Oscillator Circuit Symbol

Learn more about quartz crystal and crystal oscillator here.

Crystal oscillator circuit symbol.

A more accurate term for it is piezoelectric resonator. The symbol circuit of a crystal oscillator is as shown below. This is the symbol of crystal oscillator. The metalized surfaces are made for electrical connections and the quartz physical size and density also the thickness is tightly.

In crystal oscillators the usual electrical resonant circuit is replaced by a mechanically vi brating crystal. The resonator circuit uses a crystal to generate the oscillation led to the name as crystal oscillator. Generally it is used quartz crystal whose piezoelectricity provides an accurate frequency to apply to timing circuits. These crystals are made of a natural or synthetic piezoelectric semiconductor material whose are arranged in order to provide some degree of geometric regularity.

The circuit symbol of a crystal is shown in figure 11 7 a the electrical equivalent circuit modelling its behaviour can be seen in figure 11 7 b and the variation of the reactance with frequency in figure 11 7 c the equivalent circuit is that of a series and parallel resonant circuit. The basic components used in the circuit inductance l represents crystal mass capacitance c2 represents compliance and c1 is used to represent the capacitance that is formed because of crystal s mechanical moulding resistance r represents the crystal s internal structure friction the quartz crystal oscillator circuit diagram consists. The crystal usually quartz has a high degree of stability in holding con stant at whatever frequency the crystal is originally cut to operate. Most of this will be made up by the two capacitors c1 and c2 although the remaining elements of the circuit will provide some capacitance.

If the reactance produced by capacitance c1 is equal and opposite to the reactance produced by inductance l1 then the series resonance occurs. Piezoelectric crystals symbols crystal oscillators. Similar to the crystal oscillator ceramic resonator is also an electronic circuit or a. The crystal oscillators are therefore used whenever great stability is needed for example in communication trans mitters and.

What is a ceramic resonator. Quartz crystal and its equivalent circuit. The crystal oscillator circuit will be designed to present this capacitance to the crystal. A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric resonator a crystal as its frequency determining element.

The quartz crystal is made from thin piece of quartz wafer tightly fitted and controlled between two parallel metalized surfaces. Crystal is the common term used in electronics for the frequency determining component a wafer of quartz crystal or ceramic with electrodes connected to it.