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Pulse-amplitude modulation
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===Electronic drivers for LED lighting=== Pulse-amplitude modulation has also been developed for the control of [[light-emitting diode]]s (LEDs), especially for lighting applications.<ref>{{cite magazine |first=Tim |last=Whitaker |date=January 2006 |url=http://www.ledsmagazine.com/articles/2006/01/closed-loop-electronic-controllers-drive-led-systems.html |title=Closed-Loop Electronic Controllers Drive LED Systems |magazine=LEDs |access-date=2020-10-29 }}</ref> LED drivers based on the PAM technique offer improved [[Efficient energy use|energy efficiency]] over systems based upon other common driver modulation techniques such as [[pulse-width modulation]] (PWM) as the forward current passing through an LED is relative to the intensity of the light output and the LED efficiency increases as the forward current is reduced. Pulse-amplitude modulation LED drivers are able to synchronize pulses across multiple LED channels to enable perfect color matching. Due to the inherent nature of PAM in conjunction with the rapid switching speed of LEDs, it is possible to use LED lighting as a means of wireless data transmission at high speed.
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