All Crystals Oscillators are available in bulk quantity at the best prices here. Sourcewell is an authorized distributor of Crystals and Oscillators in India. Crystal Oscillators are dense in size and are of low cost due to which they are used in large scale in electronic warfare system, microprocessor, microcontroller, etc. Such Oscillators are said to be crystal oscillators. Use of piezoelectric crystals in the parallel vibrant circuits which supplies high-frequency stability in oscillators. Please refer to this link to know more about Crystal Oscillator MCQsĭo you know the types of crystal oscillator circuits? Furthermore, technical assistance can be provided based on your comments posted in the comments below.Crystal Oscillators’ principle depends upon the Piezoelectric effect. Please refer to this link to know more Colpitts Oscillator MCQs, Oscillators MCQs Consumer Applications of Crystal OscillatorĬrystal oscillators are used in many consumer goods such as cable television systems, personal computers, video cameras, toys and video games, radio systems, cellular phones, and so on. Use of Crystal Oscillator in AutomotiveĬrystal oscillator is used for engine controlling, stereo, clock and to trip computer, and in GPS system. There are a huge number of industrial applications of crystal oscillator such as in computers, digital systems, instrumentation, phase locked loop systems, marine, modems, sensors, telecommunications, disk drives, and so on. Industrial Applications of Crystal Oscillator The crystal oscillator is used in research and measurement for celestrial navigation, space tracking purpose, in the measuring instruments and medical devices, and so on. Use of Crystal Oscillator in Research and Measurement The use of crystal oscillator in military and aerospace, is to establish an efficient communication system, for the navigation purpose, electronic warfare, in the guidance systems, and so on. There are numerous applications for crystal oscillator in various fields and a few crystal oscillator applications are shown below: Application of Crystal Oscillator in Military and Aerospace This crystal oscillator is used to generate clock pulses required for the synchronization of all the internal operations. 8051 requires 12 clock cycles for one machine cycle, such that to give effective cycle rate at 1MHz (considering 12MHz clock) to 3.33MHz (considering maximum 40MHz clock). Let us consider 8051 microcontroller for which an external crystal oscillator circuit of 12MHz is essential, even though (based on model) 8051 microcontroller is capable to run at 40 MHz (max). In general, we know that, crystal oscillators are used in the microprocessors and microcontrollers for providing the clock signals. Typically, crystal oscillators are having a frequency range from 32KHz to 200MHz. The above figure shows the graph between impedance and frequency of the quartz crystal oscillator circuit. The series and parallel resonant frequencies are represented by fs and fp respectively, and the values of fs and fp can be determined by using the following equations shown in the figure below. If the reactance produced by capacitance C1 is equal and opposite to the reactance produced by inductance L1, then the series resonance occurs. The quartz crystal oscillator circuit diagram consists of series resonance and parallel resonance, i.e., two resonant frequencies. The basic components used in the circuit, inductance L1 represent crystal mass, capacitance C1 represents compliance, resistance R1 represents the crystal’s internal structure friction, and C0 is used to represent the capacitance that is formed because of crystal’s mechanical moulding. The equivalent electrical circuit also represents the crystal action of the crystal. Generally, 8MHz crystal oscillator is used in microprocessors and microcontrollers. Hence, quartz crystal oscillator circuits are superior compared to other resonators such as LC circuits, turning forks, and so on. These quartz crystal oscillators are highly stable, consists of good quality factor, they are small in size, and are very economical.
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