A quiet, well-regulated power supply is important for optimum performance in a number of integrated circuit (IC) applications. In this article, find out about modern noise measurement protocols, and how new regulators from Analog Devices can help.
Noise in the output voltage of a power regulator can sometimes lead to problems as it moves through the rest of an IC. For example, radiofrequency (RF) amplifiers have little to no ability to handle variations in supply input. However, measuring the noise in voltage output is very exacting, and can require specialized tools and techniques. In research performed by Linear Technology (now a subsidiary of Analog Devices), it was found that the use of an amplifier is helpful in being able to measure the noise, as is the use of a shielded metal box. By the end of the article, you will have an actionable understanding of the steps needed to measure and remedy noise.
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