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Difference between revisions of "pulse-width modulation"

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<math>
 
<math>
 
\text{duty_cycle} = t_{on}f(t) = \frac{t_{on}}{t_{on}+t_{off}}
 
\text{duty_cycle} = t_{on}f(t) = \frac{t_{on}}{t_{on}+t_{off}}
−
</math> Where the duty_cycle can be controlled by varying ''t<sub>on</sub>'' or ''t<sub>off</sub>''.
+
</math>
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Where the duty_cycle can be controlled by varying ''t<sub>on</sub>'' or ''t<sub>off</sub>''.

Revision as of 11:26, 11 December 2013

PWM signal vs analog signal.

Pulse-width modulation (PWM), also known as pulse-duration modulation (PDM) is a technique of modulating the duration of the HIGH and LOW pulses of a digital signal. A PWM signal is a way of representing an analog signal in a digital circuit. The application of pulse-width modulation varies greatly from communication and encoding to controlling the power delivered to an external device such as a motor or an LED. The purpose of pulse-width modulation is to vary the duty cycle according to Where the duty_cycle can be controlled by varying ton or toff.

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