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Crystal Oscillator Circuit and Its Working

Crystal Oscillator Circuit and Its Working. Crystal Oscillator Circuit and Working. Introduction:.

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Crystal Oscillator Circuit and Its Working

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  1. Crystal Oscillator Circuit and Its Working

  2. Crystal Oscillator Circuit and Working Introduction: • A crystal oscillator is an electronic oscillator circuit which is used for the mechanical resonance of a vibrating crystal of piezoelectric material. It will create an electrical signal with a given frequency. This frequency is commonly used to keep track of time. Crystal oscillators must be designed to provide a load capacitance. http://www.elprocus.com/

  3. Crystal Oscillator Circuit and Working Different Types of Oscillator • Linear oscillators – Hartley oscillator, Phase-shift oscillator, Armstrong oscillator, Clapp oscillator, Colpitts oscillator. • Relaxation oscillators – Royer oscillator, Ring oscillator, Multivibrator Oscillator and Voltage Controlled Oscillator (VCO). http://www.elprocus.com/

  4. Crystal Oscillator Circuit and Working What is a Quartz Crystal? • A quartz crystal exhibits a very important property known as the piezoelectric effect. • When a mechanical pressure is applied across the faces of the crystal. • A voltage which is proportional to mechanical pressure appears across the crystal. • That voltage causes distortion in the crystal. http://www.elprocus.com/

  5. Crystal Oscillator Circuit and Working What is a Quartz Crystal? • Distorted amount will be proportional to the applied voltage. • An alternate voltage applied to a crystal it causes to vibrate at its natural frequency. • Quartz crystal in an electronic oscillator that consists of resistor, inductor, and capacitors. http://www.elprocus.com/

  6. Crystal Oscillator Circuit and Working Quartz Crystal Circuit http://www.elprocus.com/

  7. Crystal Oscillator Circuit and Working Crystal Oscillator Circuit Diagram http://www.elprocus.com/

  8. Crystal Oscillator Circuit and Working Crystal Oscillator Circuit Diagram • Bipolar transistors or FETs are used in construction of Crystal oscillator circuits. • Because operational amplifiers can be used in different low frequency oscillator circuit. • It is below 100KHz but operational amplifiers do not have the bandwidth to operate. • It will be a problem at the higher frequencies that are matched to crystals which are above 1MHz. http://www.elprocus.com/

  9. Crystal Oscillator Circuit and Working Crystal Oscillator Circuit Diagram • To overcome this problem Colpitts crystal oscillator is designed. • It will work at higher Frequencies. • In this Oscillator, the LC tank circuit that provides the feedback oscillations has been replaced by a quartz crystal. • Crystal Oscillators, that works with 16MHz frequency. http://www.elprocus.com/

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