Subharmonic

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subharmonic

[¦səb·här′män·ik]
(physics)
A sinusoidal quantity having a frequency that is an integral submultiple of the frequency of some other sinusoidal quantity to which it is referred; a third subharmonic would be one-third the fundamental or reference frequency.

Subharmonic

 

in radio engineering, a sinusoidal oscillation with a frequency usually equal to an integral submultiple or proper fraction of the fundamental frequency. Subharmonics are produced by means of frequency dividers. Some frequency dividers can reduce the frequency by a factor of several thousand in a single stage.

REFERENCES

Rizkin, I. Kh. Umnozhiteli i deliteli chastoty. Moscow, 1966.
Hughes, W. Nelineinye elektricheskie tsepi. Moscow, 1967. (Translated from English.)
Lapitskii, E. G., A. M. Semenov, and L. N. Sosnovkin. Raschet diapazonnykh radioperedatchikov. Leningrad, 1974.

Subharmonic

 

(Russian, unterton), a sinusoidal component of a periodic oscillation of complex shape. The frequency of a subharmonic is an integral submultiple—usually by a factor of two—of the fundamental frequency. As a rule, subharmonics occur in nonlinear systems.

References in periodicals archive ?
Pure sine wave UPS has highest amplitude of the subharmonic and square wave UPS has lowest order.
Yu, The existence of periodic and subharmonic solutions for second order superlinear difference equations, Sci.
They found that the harmonic and subharmonic resonances are more easily generated in elastic liquids and the normalized maximum radius, ([R.
Thus, after determining the partial tide coefficients, argument numbers and hourly angular velocities of all the subharmonics and composed harmonics not explicitly present in Tamura's tidal development, we have included them.
These subharmonics are typically the strongest spurious signals and are at times stronger than the desired test signal.
Lazer, On second order, periodic, symmetric, differential systems having subharmonics of all sufficiently large orders, J.
Titze, "Perception of Pitch and Roughness in Vocal Signals with Subharmonics," Journal of Voice 15, no.
The HFF crystal is coupled through a SAW filter, suppressing any subharmonics of the operating frequency to typically less than -55 dBc.
The new VTOs operate at fundamental frequencies with no inherent spurious responses or subharmonics.
In the DDS, digit manipulation involving division by shift registers produce the desired subharmonics.
It's important to many of our customers to pick out low-level subharmonics clearly and easily at frequencies below 5 Hz.
11] Dingbian Qian, Infinity of subharmonics for asymmetric Duffing equations with Lazer-Leach-Dancer condition, J.