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Cut noise through proper supply bypass filtering

Posted: 31 Oct 2012     Print Version  Bookmark and Share

Keywords:error  digital-to-analogue converter  temperature drift 

If sensitive analogue systems are run from one supply without the sufficient bypassing to eliminate noise, undesired degradation in a system's performance will result. This application note provides insight into suitable techniques to overcome this roadblock.

You have combined digital and analogue functions together in the final stage of a system design. But then the performance of the analogue function, such as an audio amplifier, deteriorates due to the noise originating from the digital circuits. This can happen even after conventional preventive measures (e.g., separating analogue and digital grounds, shielding) were taken. Noise interference problems can likely be traced to the coupling of power supplies, sometimes even if separate linear regulators are used.

View the PDF document for more information.

Originally published by Maxim Integrated at www.maximintegrated.com as "Eliminate Noise Through Proper Supply Bypass Filtering".





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