340:. It is designed to work with high levels of background noise near the microphone. One form operates by up-converting the audio signal to an ultrasonic frequency, hard limiting that signal, and then down converting the result. The frequency conversion uses image-cancelling heterodyning. The advantage of clipping the supersonic signal is that the odd harmonics produced will still be out-of-band when down converted. This is in contrast to standard hard limiting, as in an electric guitar fuzz box, where the harmonics are highly audible. This device ultimately gives a distinctive character to the voice communication, which despite being highly distorted, ensures spoken words remain clear.
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stage, reducing the effect of input signal level changes to the output. If two or more signals are received at the same time, a high-performance limiter stage can greatly reduce the effect of the weaker signals on the output. This is commonly referred to as the FM
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is in effect, limiters are used to lower the capacity of houses of non-paying customers. The limiters allow enough power to run a furnace and a few lights. Tampering with the limiter is illegal.
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Limiters are common as a safety device in live sound and broadcast applications to prevent sudden volume peaks from occurring. Limiters are also used as protective features in some components of
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receiver usually has at least one stage of amplification that performs a limiting function. This stage provides a constant level of signal to the FM
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Limiting can refer to a range of treatments designed to limit the maximum level of a signal. Treatments in order of decreasing severity range from
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and power amplifiers are more commonly equipped with limiter circuitry to prevent overloading the power amplifier and to protect speakers.
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Generally, FM demodulators are not affected by amplitude variations, since the baseband is contained in the
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For military two-way radio sets and aircraft VHF voice telecommunications, the voice limiter is known as a
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is any process by which the amplitude of a signal is prevented from exceeding a predetermined value.
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is a circuit that allows signals below a specified input power or level to pass unaffected while
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can be used in limiter circuits to reflect the energy back to the source or clip the signal.
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often use limiting combined with make-up gain to increase the perceived
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This article is about signal processing. For engine speed limiters, see
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23:. For limiting related to the Law of the Minimum, see
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493:"PIN Limiter Diodes in Receiver Protectors"
260:. Unsourced material may be challenged and
520:(3rd ed.). Focal Press. p. 81.
324:Learn how and when to remove this message
120:Learn how and when to remove this message
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136:Comparison of soft and hard clipping.
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518:Mastering Audio: the art and science
258:adding citations to reliable sources
58:adding citations to reliable sources
16:Electronic amplitude-limiting device
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582:General Services Administration
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154:dynamic range compression
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452:Variable-gain amplifier
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571:public domain material
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150:attenuating
142:electronics
602:Categories
552:2024-02-16
502:2015-07-28
498:. Skyworks
478:2018-05-22
458:References
359:PIN diodes
314:April 2018
284:newspapers
187:distortion
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472:"Limiter"
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379:FM radio
369:loudness
203:clipping
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