Crystal Oscillator Explained

In this video, the working and design of the crystal oscillator have been explained.

By watching this video, you will learn the following topics:

0:21 why crystal oscillator is used in certain applications

1:58 Working principle of crystal and different piezo-electric materials

4:05 The equivalent circuit of crystal and discussion on series and parallel resonant frequencies in the crystal

8:38 Crystal oscillator design using series resonance of the crystal

9:30 Colpitts oscillator using crystal

10:20 Pierce Oscillator using crystal

14:12 Things to consider while selecting crystal for crystal oscillator / for a particular application

Crystal Oscillator:

The crystal oscillators are used in applications where a very stable frequency is required.

In LC and RC oscillators, the oscillator frequency changes due to change in temperature, power supply voltage or even slight change in the component values.

In the well-designed crystal oscillator, the change in the frequency is minimum with the change in different parameters.

The crystal oscillator provides very good selectivity (due to very high Q- Quality Factor)

Working of Crystal OScillator:

The crystal oscillator works on the principle of inverse piezo-electric effect.

In the video, the principle has been explained and the different materials which are often used as crystal have been discussed briefly.
The quartz is most commonly used material for the crystal design.

The equivalent circuit of the crystal:

The crystal can be represented as the RLC circuit in the electrical equivalent circuit. And it has two resonant frequencies

1) The Series Resonant Frequency (fs)

2) The Parallel Resonant Frequency (fp)

This RLC circuit provides the frequent selectivity for the oscillation and when this crystal is used with the amplifier, it can be used as an oscillator.

In the video, different crystal oscillator circuits have been discussed and in the end, the different factors which needs to be considered while selecting the crystal have been discussed.

This video will be helpful to all the students of science and engineering in understanding the working principle and design of crystal oscillator.

The link for the other useful videos on Oscillator and Multivibrators:

How Oscillator Works

RC Phase Shift Oscillator

Wien Bridge Oscillator

What is Multivibrator?

#CrystalOscillator

Follow me on YouTube:

Follow me on Facebook:

Follow me on Instagram:

Music Credit:

[ALLABOUTELECTRONICS]

The timestamps for the different topics covered in the video:


0:21 why crystal oscillator is used in certain applications

1:58 Working principle of crystal and different piezo-electric materials

4:05 The equivalent circuit of crystal and discussion on series and parallel resonant frequencies in the crystal

8:38 Crystal oscillator design using series resonance of the crystal

9:30 Colpitts oscillator using crystal

10:20 Pierce Oscillator using crystal

14:12 Things to consider while selecting crystal for crystal oscillator / for a particular application

[MeisVlk]

I think this video is:
- Very informative.

[GH-iwrv]

Great video! You do a good job explaining how the various components work. Keep up the good work!

[seankenny]

This video was so helpful! Thank you so much!

[friedmule]

Thanks, wary great video and easy to follow!

[kamleshchavan]

Excellent video brilliantly explained in easy way
Sir please🙏 make a video on explaining in detail the working of any RF transmitter receiver module circuit diagram, step by step, covering all the required topics used to design the RF circuit diagram

[habtamusium]

an interesting lesson in well understandable approach . many thanks !

[engineerkohat]

Excellent video. Keep the nice work up.

[weikiatteo]

Hi, the Cp and Cs are parallel to each other, so why is the Ceq = (Cp*Cs)/(Cp+Cs) ? and not Ceq=Cp+Cs ?

[materialengineer]

Thank u sooo mch sirr.... I really undersand the topic..

[MrAmitrege]

Excellent explanation, however, at 7:12 in the video, it mentions 'parallel combination' while the formula on the slide is of series combination of capacitors. Capacitors add directly in parallel. In the loop the two capacitors are in series only I think. Please clarify. Thanks in advance.

[rahulmadhu-jlgw]

It was more informative and understandable thanks

[abhishekashtekar]

Best video sir
It's clear over doubts

[sunilshah]

You explain all the topics of electronics so easily that anyone can understand it and it is far better than attending the our teachers lectures.

[iska]

thank you for your time really appreciate

[Paultimate]

These are good videos man, one think that would REALLY help your channel is some voice classes. It is hard to understand you and you enunciate in an off way for native speakers so it makes it a little harder to get though. Even native speakers benefit from voice coaching. Keep it up!

[MrAmitrege]

Another question, overtones are harmonics meaning even higher frequencies, which will require even thinner crystal. Is there any confusion?

[dancoulson]

I understand that the crystal will deform when a voltage is applied accross it.
I understand that it will have a natural resonant frequency.
But I also know that it must be 'pumped' with a voltage *at the resonance frequency* . So what generates that pump frequency? And surely that would negate the need for the crystal all together, as you already have that frequency being generated?

[daliaaichour]

hi, I still don't get how to select the values of the components to make the crystal oscillate at his own resonant frequency ?

[farhanupaul]

How does the Rf makes the CMOS inverter work as an amplifier in the linear region?