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Such a great video! At first I didn't understand how this was possible, but once you said filter out the higher harmonics a light just clicked. So obvious in hindsight. Such a beautiful combination of theory and practice!

Hey guys! Don't forget to subscribe to channel to help me grow it 😁

Hello, excellent video with your intervention, there was no doubt. Congratulations on the excellent electronics laboratory and I already liked the channel. Hugs and strength on demand.washhands

Great video! thank you for uploading these

Great explanation!

So well explained. The first video I see from your channel, this is a hard topic, and I am not electronic professional but I understood it in 7 minutes !!! You're a true master!

@AllElectronicsChannel

Жыл бұрын

Thanks and welcome to the channel!

Very good explanation, thanks for your video.

@AllElectronicsChannel

3 жыл бұрын

Thank you!

Very important point you should have mentioned is that when an oscillator is a square wave, the frequency response is infinite multiple frequencies of 16MHZ. At first I was wondering why there was no non linear device such as a diode or transistor. Then I realized, after remembering DSP while back, I remembered about square wave has infinite sine waves.

Hello, great video, in PLL multiplier aplication are the frequencys Fin and Fout syncronized? For example, if 1.024Mhz was multiplied by 375 and then divided by 6 then the output frequency will be 64 Mhz, are the 64MHZ and 1.024MHZ signals syncronized? I mean, the Fin and Fout are going high and low syncronized (at the same time)?

@AllElectronicsChannel

3 жыл бұрын

Hello! If the multiplying factor is an integer, every N edge will be exactly in sync. If you are using a fractional ratio, the edges will be synced in a statistical way.

@amirb715

3 жыл бұрын

@@AllElectronicsChannel very nice video. not just this one, but all of your videos. for fractional N I still think they are synchronized. E.g. if I want to divide by 1.7 then every 10 cycle of Fout is exactly synched with 17 cycle of Fin.

Thanks for this! I often wondered how frequency multiplying was done. Please can you say how to reduce a frequency? Is there a minus harmonic?

@AllElectronicsChannel

2 жыл бұрын

There is not! You will probably need frequency dividers (flip flops) or analog frequency divider (very rare to see today)

@acestudioscouk-Ace-G0ACE

2 жыл бұрын

@@AllElectronicsChannel Thanks very much for the swift reply. I have lots to learn but am enjoying learning. Thanks again for your work and videos.

I need to know how to design the low-frequency multiplier. My input Frequency is 0-120Hz and I want to multiply it by 100. Please let me know if you can help me with this.

Thanks for this. Really appreciated. I have one question how to convert 2kHz to 5kHz?

@AllElectronicsChannel

Жыл бұрын

Maybe a 4046 PLL.. take a look this IC

sir can you also mention the op-amp number

good video... can i use the same idea to increase output frequency of a dds signal generator?

@AllElectronicsChannel

2 жыл бұрын

Yes you can! But this technique will only work for the frequency where the filters are tuned, it is not a broadband method.

@bonfacemusyoka2337

2 жыл бұрын

@@AllElectronicsChannel Which frequency multiplier can you recommend to increase MHz frequency to GHz

@AllElectronicsChannel

2 жыл бұрын

To get GHz from MHz you need a PLL or multiple multipliers.. take a look on the channel!

@bonfacemusyoka2337

2 жыл бұрын

@@AllElectronicsChannel okay... thanks

Is there a circuit board I can buy to multiply by 1.5?

@AllElectronicsChannel

3 жыл бұрын

Hey man! You could multiply by 3 and divide by 2.. but for fractional frequency synthesis a PLL will be more adequate 😉

Nice video.Can u pls make video for analog multiplier circuit.

@AllElectronicsChannel

3 жыл бұрын

Thanks! Do you mean analog voltage multiplication?

@rodneybernard4959

3 жыл бұрын

Ya .analog voltage multiplication

The same logic can be applied to divide a frequency?

@AllElectronicsChannel

3 жыл бұрын

For division flip flops are more used

The band pass filter is a Resonant circuit ?

@AllElectronicsChannel

2 жыл бұрын

Yes!!

How can frequency doubling be achieved by a PLL loop?

@AllElectronicsChannel

Жыл бұрын

Let's say you have a frequency divider between the VCO and phase comparator. The loop will lock the VCO at twice de frequency, so the two phase comparator inputs become matched.

hi anyone can help me understand why pierce oscillator output is square wave, instead of sinusoid? Thanks

@AllElectronicsChannel

2 жыл бұрын

Because the output is taken from the amplifier. The crystal filters the signal and on its output you will have a sine wave.

Very good clip, thanks. But looking at the output, I do not believe your phase noise to be -105dB. The output signal does not look like clean sine wave, so your phase noise can not be that good. Probably, you made a mistake in measurement somewhere. Maybe, other people can tell us why your phase noise measurement was wrong. Maybe , you sent the output into another filter that clean the output.

@AllElectronicsChannel

Жыл бұрын

-105db is not special for a crystal oscillator

@aduedc

Жыл бұрын

@@AllElectronicsChannel Thanks for your replay, I used PLL and crystal oscillator and get about 70 to 80 dB phase noise. I wonder what was the phase noise of the original oscillator? If you can generate this good multiple frequency, then we can always double the frequency and divide it by two to generate 90 Deg. phase difference signal for IQ applications.

@AllElectronicsChannel

Жыл бұрын

Frequency multiplication degrades de phase noise by 20 log (N) , you may estimate the reference phase noise

Although you did frequency multiplication x3 but truly you did not... The important thing is you input pure sine wave frequency within a bandwidth and has it multiplied x3 and again same sine wave at the output , this is called multiplication but the technical problem is you can do this by even numbers not by odd numbers !!....

@oldblokeh

3 жыл бұрын

Easy enough to double a frequency. Just use a full-wave rectifier followed by a bandpass filter.

Narender.m