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  2. Harmonics (electrical power) - Wikipedia

    en.wikipedia.org/wiki/Harmonics_(electrical_power)

    The triplen harmonics of a distorted (non-sinusoidal) periodic signal are harmonics whose frequency is an odd integer multiple of the frequency of the third harmonic(s) of the distorted signal, resulting in a current in the neutral conductor. [4]

  3. Tube sound - Wikipedia

    en.wikipedia.org/wiki/Tube_sound

    This mainly harmonic distortion is a unique pattern of simple and monotonically decaying series of harmonics, dominated by modest levels of second harmonic. The result is like adding the same tone one octave higher in the case of second-order harmonics, and one octave plus one fifth higher for third-order harmonics.

  4. Frequency multiplier - Wikipedia

    en.wikipedia.org/wiki/Frequency_multiplier

    Easy choices are to use an even function to generate even harmonics or an odd function for odd harmonics. See Even and odd functions#Harmonics. A full wave rectifier, for example, is good for making a doubler. To produce a times-3 multiplier, the original signal may be input to an amplifier that is over driven to produce nearly a square wave ...

  5. Harmonic - Wikipedia

    en.wikipedia.org/wiki/Harmonic

    In physics, acoustics, and telecommunications, a harmonic is a sinusoidal wave with a frequency that is a positive integer multiple of the fundamental frequency of a periodic signal. The fundamental frequency is also called the 1st harmonic; the other harmonics are known as higher harmonics.

  6. Power amplifier classes - Wikipedia

    en.wikipedia.org/wiki/Power_amplifier_classes

    For those who prefer low distortion figures, the use of tubes with class A (generating little odd-harmonic distortion, as mentioned above) together with symmetrical circuits (such as push–pull output stages, or balanced low-level stages) results in the cancellation of most of the even distortion harmonics, hence the removal of most of the ...

  7. Radio transmitter design - Wikipedia

    en.wikipedia.org/wiki/Radio_transmitter_design

    The two NPN transistors can be biased to class A, AB or C, and will still have very weak harmonics at even multiples of the design frequency. The odd harmonics will be stronger, but still manageable. Class C will have the most harmonics. This single ended amplifier uses a narrowly tuned anode circuit to reduce harmonics when operating class AB ...

  8. Acoustic resonance - Wikipedia

    en.wikipedia.org/wiki/Acoustic_resonance

    In the first harmonic, the open tube contains exactly half of a standing wave (antinode-node-antinode). Thus the harmonics of the open cylinder are calculated in the same way as the harmonics of a closed/closed cylinder. The physics of a pipe open at both ends are explained in Physics Classroom. Note that the diagrams in this reference show ...

  9. Clipping (audio) - Wikipedia

    en.wikipedia.org/wiki/Clipping_(audio)

    The additional high frequency energy in the harmonics generated by an amplifier operating in clipping can damage the tweeter in a connected loudspeaker via overheating. [ 2 ] [ 3 ] Clipping can occur within a system as processing (e.g. an all-pass filter ) can change the phase relationship between spectral components of a signal in such a way ...