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Q: Why there is no even harmonics in symmetrical signals?
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Why even harmonics are not present in push pull amplifier?

Symmetrical push/pull circuits must cancel even ordered harmonics, like f2, f4, f6 and therefore promote odd ordered harmonics, like (f1), f3, f5 when driven into the nonlinear range.


Why do complex non-sinusoidal signals produce greater bandwidth?

because they have more harmonics


What are odd and even harmonics?

A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency. If the fundamental frequency is f, the harmonics have frequencies f, 2f, 3f, 4f, etc. Even harmonics are 2f, 4f, 6f, ... Odd harmonics are f, 3f, 5f, ... And remember: Even harmonics 2f, 4f, 6f,... are odd overtones. Odd harmonics f, 3f, 5f,... are even overtones. Scroll down to related links and look at "Calculations of harmonics from fundamental frequency".


Is odd harmonics present in push pull amplifier?

Odd harmonics are theoretically the only harmonics that are produced by a push-pull amplifier, and even the level of odd harmonics should be very low.


Why even harmonics do not exits in ac machines?

Because the resulting voltage waveform is symmetric about the center of the rotor flux, no even harmonics are present in the phase voltage.


Why we use odd harmonic and do not use even harmonic?

Odd harmonics are used in certain applications, such as audio signal processing, because they can create a more complex and rich sound quality compared to even harmonics. Even harmonics tend to sound more artificial or mechanical. Additionally, odd harmonics are more prominent in natural sounds and can be perceived as more pleasing to the human ear.


How do you get symmetric Gaussian curve?

when the signals are symmetric then this signals are gaussian In statistics, the Gaussian curve, also known as the Normal curve, is symmetrical.


Is odd or even harmonic distortion more pleasing to the ear?

Scroll down to related links and look at "Harmonics and overtones in comparison" or scroll down to related links and look at "Calculations of Harmonics from Fundamental Frequency". http://www.sengpielaudio.com/calculator-harmonics.htm Besides the fundamental "even harmonics" bring here the added tones: c , c, g, c, e, g , bflat, c :-) and "uneven harmonics" bring here the tones: g, e, bflat, d, f#, aflat, b ;-( Which of those both rows will be more pleasing? You can see it. Even harmonics sound more brilliant. Don't mix up harmonics with overtones! Even harmonis are uneven overtones and uneven harmonics are even overtones. Better stay with the word harmonics.


Why is pitch different fron frequency?

"pitch" is usually taken to be the fundamental frequency. This is the lowest frequency. For a pure sin wave this is the same. Most signals, sounds, are not sinusoidal, pure sin waves. They have harmonics: they have a different shape. The harmonics are (in theory) all multiples of the lowest frequency. Many waveforms you see, tend to have a symmetry that means there are no appreciable even harmonics, so you get 1, 3, 5, 7, ... times the fundamental, the pitch. For these you can do a lot of the strengths of the harmonics. The fundamental frequency, the lowest one is the pitch.


What is meant by harmonics?

harmonics is nothing but an unwanted noise or ripples.A harmonic of a wave is a component frequency of the signal that is an integer multiple of the fundamental frequency. If the fundamental frequency is f, the harmonics have frequencies f, 2f, 3f, 4f, etc. For example, if the fundamental frequency is 50Hz, the frequencies of the harmonics are: 50 Hz, 100 Hz, 150 Hz, 200 Hz, etc. Don't forget: Even harmonics 2f, 4f, 6f,... are odd overtones. Odd harmonics f, 3f, 5f,... are even overtones. Scroll down to related links and look at "Calculations of harmonics from fundamental frequency".


Is the value of even harmonics much less the same or greater than odd harmonics?

There is a little problem in counting the harmonics and the overtones. So you find different statements in the internet. Some are wrong and some are right. Scroll down to related links and look at "Calculations of Harmonics from Fundamental Frequency".


Sources of harmonics?

Harmonics is multiple of fundamental frequency. Spurious is not related to fundamental frequency but it is observed at the output spectrum. Harmonics are generated due to non-linearity of the device. Harmonics can generate spurious. As an example harmonics can produce resonance with mechanical box internal structure and can generate spurious. Harmonics generally generated from TCXO & frequency multipliers. If amplifier is non-linear, this will also generate harmonics. But harmonics very near to carrier generally generates interference to modulating signals. We design final power amplifier as a class AB amplifier to get more output power and better efficiency and also to minimize output power variation with temperature. Since it is non linear amplifier it generates harmonics but it will be very far from carrier and can be filtered easily. See the link for detail :- http://harshit.org/spurious and harmonics.pdf