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Duty cycle
 
 
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In telecommunication
Telecommunication

Telecommunication is the assisted Transmission of Signal over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, Drum , Semaphore line, flag signals or heliograph....
s and electronics
Electronics

Electronics refers to the flow of charge through nonmetal electrical conductor , whereas electrical refers to the flow of charge through metal electrical conductor....
, the duty cycle is the fraction of time that a system is in an "active" state. In particular, it is used in the following contexts:

Duty cycle is the proportion of time during which a component, device, or system is operated. Suppose a disk drive operates for 1 second, and is shut off for 99 seconds, then is run for 1 second again, and so on.






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Dutycycle
In telecommunication
Telecommunication

Telecommunication is the assisted Transmission of Signal over a distance for the purpose of communication. In earlier times, this may have involved the use of smoke signals, Drum , Semaphore line, flag signals or heliograph....
s and electronics
Electronics

Electronics refers to the flow of charge through nonmetal electrical conductor , whereas electrical refers to the flow of charge through metal electrical conductor....
, the duty cycle is the fraction of time that a system is in an "active" state. In particular, it is used in the following contexts:

Duty cycle is the proportion of time during which a component, device, or system is operated. Suppose a disk drive operates for 1 second, and is shut off for 99 seconds, then is run for 1 second again, and so on. The drive runs for one out of 100 seconds, or 1/100 of the time, and its duty cycle is therefore 1/100, or 1 percent.

In a periodic phenomenon, the ratio of the duration of the phenomenon in a given period to the period.

duty cycle
where is the duration that the function is non-zero; is the period of the function.

For example, in an ideal pulse train (one having rectangular pulses), the duty cycle is the pulse duration
Pulse duration

In signal processing and telecommunication, the term pulse duration has the following meanings:#In a Pulse waveform, the interval between the time, during the first transition, that the pulse amplitude reaches a specified fraction of its final amplitude, and the time the pulse amplitude drops, on the last transition, to the same level....
 divided by the pulse period. For a pulse train in which the pulse duration is 1 µs and the pulse period is 4 µs, the duty cycle is 0.25. The duty cycle of a square wave
Square wave

A square wave is a kind of non-sinusoidal waveform, most typically encountered in electronics and signal processing. An ideal square wave alternates regularly and instantaneously between two levels....
 is 0.5, or 50%.

In a continuously variable slope delta (CVSD) modulation
Continuously variable slope delta modulation

Continuously variable slope delta modulation is a Speech coding method. It is a delta modulation with variable step size , first proposed by Greefkes and Riemens in 1970....
 converter, the mean proportion of binary
Binary numeral system

The binary numeral system, or notation with a radix of 2. Owing to its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used internally by all modern computers....
 "1" digits at the converter output
Output

Output is the term denote either an exit or changes which exit a system and which activate/modify a process. It is an abstract concept, used in the model ing, system design and system exploitation....
 in which each "1" indicates a run
Sequence

In mathematics, a sequence is an ordered list of objects . Like a Set , it contains Element , and the number of terms is called the length of the sequence....
 of a specified number of consecutive bits of the same polarity in the digital
Digital

A digital system uses discrete values, usually but not always symbolized numerically to represent information for input, processing, transmission, storage, etc....
 output signal.

Some music synthesizers vary the duty cycle of their audio-frequency oscillators to obtain a subtle effect on the tone colors. This technique is known as Pulse-width modulation
Pulse-width modulation

Pulse-width modulation of a Signalling or Power source involves the modulation of its duty cycle, to either convey information over a communications channel or control the amount of power sent to a load....
 (PWM).

Use of term in equipment


In tools/equipment such as welder
Welder

A welder is a tradesman who specialises in welding materials together. The materials to be joined can be metals or varieties of plastic or polymer....
s, the maximum duty cycle is defined as the percentage of time in a 10 minute period that it can be operated continuously before overheating. Duty cycle is the time the a signal(DC) is ON compare to its period. Example, let say a DC signals of 1V stars at time t=0sec and stays there for t=2sec at which point the DC signal goes to 0V and stays there until t =10 sec. At time t = 10 the signal goes back 1V and the process repeats over and over again. Based on this analysis the signal is 1V for 0