Limiter


Also found in: Dictionary, Thesaurus, Wikipedia.

limiter

[′lim·əd·ər]
(electronics)
An electronic circuit used to prevent the amplitude of an electronic waveform from exceeding a specified level while preserving the shape of the waveform at amplitudes less than the specified level. Also known as amplitude limiter; amplitude-limiting circuit; automatic peak limiter; clipper; clipping circuit; limiter circuit; peak limiter.

Limiter

 

(in electronic engineering), a device that provides a constant output voltage level when the value of the input voltage exceeds a limiting threshold. Limiters are used extensively in pulse technology to shape and transform pulses and in radio broadcasting and multichannel communication apparatus to limit signal levels. Amplitude limiters provide a specified maximum level for the amplitudes of the fundamental oscillation (first harmonic); limiters of instantaneous values “clip off” any overshoots of oscillations.

The operation of a limiter depends on abrupt change in the conductivity of a nonlinear component (transistor, semiconductor

Figure 1. Circuit of a limiter and curves explaining its operation: (A) operating characteristic of the limiter; (B) curve of the input voltage Uin; (C) curve of the output voltage Uout; (Uu1) and (U11) voltages of sources of emf in the diode circuits that determine the lower and upper limiting thresholds, respectively; (U1) and (Uu) lower and upper levels of the limited voltage; (Uinst) instantaneous value of the oscillation amplitudes; (ab) linear portion of the limiter characteristic; (R) limiting resistor; (RL) load (output) resistor; (D1) and (D2) semiconductor diodes

diode, electron tube, and so on) when the amplitude or instantaneous value of the input voltage reaches the limiting threshold; because of this, a futher increase in the amplitude or instantaneous value of the output voltage is stopped (see Figure 1). A distinction is made between limiters with unilateral operation (with only an upper or lower limiting threshold) and clipper-limiters.

V. M. TIMOFEEV

limiter

A special-purpose fuse (usually of high current-interrupting rating) designed to protect an electrical circuit or equipment from the effects of high available short-circuit current by limiting the amount of current permitted to flow through it.
References in periodicals archive ?
Le programme du FMI avec la Tunisie repond a ces priorites, a-t-il encore indique, ajoutant qu'il vise egalement a ameliorer le compte courant exterieur en ameliorant la flexibilite des taux de change, la consolidation budgetaire, le resserrement de la politique monetaire et l'avancement des reformes structurelles, plutot qu'en recourant a des mesures administratives pour limiter les importations.
Had there been speed limiter on the bus, this kind of senseless accident would not happen,' Trenas said.
Superconducting Fault Current Limiter (SFCL) dominates the global market:
No covered vehicle shall be registered by the LTO or given franchise by the LTFRB without the standard speed limiter installed and set in the vehicle," the bill said.
As it was seen in the single machine system, using the resistance limiter which was made using high temperature superconductors reduces the amount of voltage drop at the time of the fault.
Powerful plants for renewable energies (EEG plants) must be connected to the grid via efficient fault current limiters to protect the electric components," said Jurgen Volkel, technical director of Stadtwerke Augsburg.
The UAE Ministry of Interior (MoI) had issued a notice for mandating speed limiters for private passenger buses that hold a capacity of 22 passengers in line with a recommendation it received to that effect from the Emirates Authority for Standardisation & Metrology (ESMA).
The report further confirmed that Guinness World Records have found that 'a change to the speed limiter will not alter the fundamental design of the car or its engine.
In order to study the thermal processes occurring in HTSC nonlinear resistor while current limiter working, an experimental method of the measuring local temperature any point of HTSC tapes has been established.
The operational system of the mobile angular elongation limiter, which is positioned on the right side from the equilibrium position is based on the fact that the system is pulled by the impact of the pellet, and returned to the initial position by the impact of the pellet into the elongation limiter set on the left side from the equilibrium position.
But in the meantime the limiter is on such a sensitive setting that it cuts performers off at comparatively low volumes, Mr Akroyd claims.