While it is not that hard to create a class "D" audio amplifier that functions at some level, creating one that has very low distortion and low noise, is quite a different task. While in theory a class "D" amplifier can be capable of very low distortion, what we often see is something that "sounds good" to those who are not bothered by 10% distortion as a routine condition. And of course power supply rejection is also an area where cheaper acts against better.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.