Voltage Controlled Oscillator (VCO) Explained

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Күн бұрын

In this video, the Voltage Controlled Oscillator (VCO) is explained in detail.
By watching this video, you will learn the following topics:
0:00 Introduction
0:21 What is Voltage Controlled OScillator
1:56 Applications of Voltage Controlled Oscillator
2:09 Types of VCO and Basic Working Principle
5:53 Voltage Controlled Oscillator using 555 timer
6:48 Specifications of Voltage Controlled Oscillator (VCO)
What is Voltage Controlled oscillator (VCO)?
It is the oscillator whose frequency can be controlled using the external control voltage.
In the conventional oscillators, to change the oscillator frequency, it is required to tune the passive components like a resistor and the capacitor.
But in the VCO, with the given set of passive components, just by changing the control voltage the output oscillation frequency can be changed.
Applications of VCO:
The Voltage Controlled Oscillators are used in many communications of applications.
Here is the list of some of the applications:
1) Phase Lock Loop
2) Modulation and Demodulation Circuits
3) Frequency Synthesizers
4) Function Generators
Types of VCO:
The Voltage Controlled Oscillators mainly can be classified into two categories.
1) Harmonic Oscillators
2) Relaxation Oscillators
In this video, the basic working principle of both types of oscillators is explained.
And the different important specifications of the VCO is also explained in the detail:
Specification of VCO:
1) Tuning Range
2) Tuning Gain
3) Supply Pushing and Load Pulling
4) Spectral Purity (Phase Noise)
The link for the other useful videos:
1) How Oscillator Works:
• How Oscillator Works ?...
2) Varactor Diode
• Varactor Diode Explain...
3) 555 timer
• Introduction to 555 Ti...
4) 555 timer as Astable Multivibrator
• 555 Timer as Astable M...
This video will be helpful to everyone in understanding what is Voltage Controlled Oscillator.
#VoltageControlledOscillator
#VCO
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Пікірлер: 45

@ALLABOUTELECTRONICS 4 жыл бұрын

The timestamps for the different topics covered in the video: 0:21 What is Voltage Controlled OScillator 1:56 Applications of Voltage Controlled Oscillator 2:09 Types of VCO and Basic Working Principle 5:53 Voltage Controlled Oscillator using 555 timer 6:48 Specifications of Voltage Controlled Oscillator (VCO)

@stevejackson3815 3 жыл бұрын

This is a brilliant video! It explained what all those books couldn't!

@manueljenkin95 4 жыл бұрын

Among my favourite teachers. Thank you very much for the video.

@gassanali8667 4 жыл бұрын

The best channel on KZfaq to learn electronics theory!

@ryanchan8583 2 жыл бұрын

No, far from it. If you listen to this style of and nature of delivery for too long, you'll turn into a robot.

@Jangila_Boro Жыл бұрын

@@ryanchan8583 YEAH! This guy isn't explaining anything just reading out from somewhere.

@aravinthr1690 4 жыл бұрын

very very thanks bro... Thanks for ur help in learning about these inthegrated circuits

@mayurshah9131 4 жыл бұрын

EXCELLENT 👍👍 AS USUAL

@felicity3105 4 жыл бұрын

Love your channel

@Bombayah 10 ай бұрын

Thanks for the video especially the specification part! I came across to test a Oscillator product as a test engineer, but I want to test the squegging of the oscillator, do you mind sharing if you're familiar with the methodology of this specification?

@carlos735 2 жыл бұрын

Controlling the frequency via voltage is the best method by using Varactor diode or the Varicap diode even you can divide the frequency easily and it's stable as I remember in 90's we were doing that type of circuits

@blakevanier9619 2 жыл бұрын

Great Video. How do I find more information on the output capabilities of an RF oscillator. Is there an output voltage? power output? Do you not think of oscillators like you would a normal circuit?

@shabinaprajesh9645 4 жыл бұрын

Thank you so much.,

@UpcycleElectronics 4 жыл бұрын

This is awesome. I was just wondering about this yesterday after browsing online and looking at various active crystal oscillators. So a TCXO is a VCO with a circuit that compensates for temperature. Are there TCXO's that have additional VCO type adjustments? Is that considered a "VCO with temperature compensation," a "TCXO with voltage control," or is there some other mnemonic I haven't heard of yet?

@ALLABOUTELECTRONICS 4 жыл бұрын

Yes, TCXO is the temperature compensated Crystal Oscillator. As far as I know, they do not have any additional arrangements for the frequency variation using the voltage. They are meant to provide the stable frequency irrespective of the change in the temperature. On the other end, in VCXO (Voltage Controlled Crystal Oscillator), the micro tuning of the frequency is possible ( ppm level) with the change in the control voltage.

@UpcycleElectronics 4 жыл бұрын

@@ALLABOUTELECTRONICS Thanks for the reply. A few hours after commenting here yesterday I was browsing AliExpress and a listing popped up for a VCTXO. Of course there was no datasheet or reference information, but it got me searching further. One of the first search results was from a company called Connor Winfield. They have several product lines of VCTCXO oscillators. Based on a quick skim over other search results it looks like one application for these crystals is probably cellular phones. It makes sense to me. A very precise radio with extremely demanding environmental temperature conditions seems like it could benefit from such a product. All I know is that my oscilloscope is my most accurate frequency measurements device, so messing with precision frequency devices like a VCXO is entirely pointless. I still like learning about them though. BTW I'm subscribed to over 1k people here on YT. Over half of them are electronics related. There are a lot of people doing similar content as you, but they don't quite do it as well. Your presentation style and content length are perfect for me to watch casually. It's one of the few I watch regularly. I just want to say I appreciate it, and thanks. You're doing a Iittle bit to help me, some random disabled person in California, to stay busy, learn something, and make better use of his time. Thanks.

@rohithrevindran1 4 жыл бұрын

You explain the concepts really well. Thus making it very easy to understand the concepts. I would like know to if you have come across any phase noise models for PLL/VCO which can be used to predict the levels and characteristics of phase noise. If yes, kindly share it with a video/documents about them. Thank you!

@mohammedhassan-fu8rb 4 жыл бұрын

fantastic

@eee_bangla 4 жыл бұрын

Please make vedio on communication system

@roshankoirala6401 4 жыл бұрын

will you do a video about Direct Digital Synthesis.

@athulyaskumar2995 4 жыл бұрын

Explained very well..Now this is my fav classroom. Sir, can you tell how can we set High level and low level to the output of a pulse generator? I tried clamping circuit. But it's not working with that.

@ALLABOUTELECTRONICS 4 жыл бұрын

Do you mean the amplitude of the waveform ?

@souvickmajumdar2003 4 жыл бұрын

Sir pls make a class on feedback 🥺

@ArjanvanVught 4 жыл бұрын

Can or will you do a video about PLL? Thanks.

@ALLABOUTELECTRONICS 4 жыл бұрын

Yes, very soon.

@venky2144 3 жыл бұрын

Im searching for multiple videos for info- How Oscilattor will work in Prximitty sensors?

@ajingolk7716 6 ай бұрын

Let say the tunning gain is 1MHz/V what does this mean the steps also gonna be per volt or something else

@bitsandscience 3 жыл бұрын

Hi! I would like to know if VCO can amplify the frequency of an input signal. So I have an oscillating input signal and I want to increase its frequency. Is it possible? If not, is there another option to do so?

@ALLABOUTELECTRONICS 3 жыл бұрын

Using Phase Lock Loop (PLL) it is possible to do that. Please check the video on PLL, I have already explained it in that video.

@bitsandscience 3 жыл бұрын

@@ALLABOUTELECTRONICS thank you so much! I'll do it 😉

@ramanapolireddy5040 4 жыл бұрын

Phased locked loop used frequency divider video please

@ALLABOUTELECTRONICS 4 жыл бұрын

Very soon it will be uploaded.

@aswinstiger1026 4 жыл бұрын

but the frequency is inversely proportional to the product of resistance and capacitance and not to the square root of the product of resistance and capacitance....

@sramanthrockzz5785 2 жыл бұрын

Sir Pin Diagram Of Voltage Controlled Frequency And Astable Multivibrator Are Same ?? Plz Clarify Me Sir

@ALLABOUTELECTRONICS 2 жыл бұрын

No, it will be different.

@tanumoypramanik7760 4 жыл бұрын

Sir what is the ic no of voltage controlled harmonic oscillator? ???

@ALLABOUTELECTRONICS 4 жыл бұрын

There are many actually. depending on the range, you can select. For example, for 40 MHz to 650 MHz range, you can use MAX 2605 - MAX 2509. Each covers the different range. For example, MAX 2605 covers 40 MHz to 70 MHz, while MAX 2509 covers the range from 500 MHz to 650 MHz. These VCOs are based on the Colpitts Oscillator. You need to connect the external inductor. the values of each range is given the datasheet. You can check the mouser website and search for the specific VCO. You can use filter option to choose the specific VCO.

@tanumoypramanik7760 4 жыл бұрын

@@ALLABOUTELECTRONICS thanks sir