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Minimize noise in audio channels with smart PCB layout

Posted: 20 Sep 2007 ?? ?Print Version ?Bookmark and Share

Keywords:PCB design? layout? minimize noise?

For PCB layout engineers, cellphones provide the ultimate challenge. Each subsystem has conflicting requirements, and modern cellphones include nearly every subsystem found in a portable device. A well-designed PCB must both maximize the performance of each device connected to it and prevent the various subsystems from interfering with each other. Inevitably, the conflicting requirements of each subsystem result in some compromise. Finally, although audio functionality in cellphones is increasing, the audio circuitry is often given the least consideration during PCB design.

This application note discusses several factors that affect audio functionality in a cellphone PCB design. The article shows examples of a problematic and a well-designed PCB for a cellphone. The differences between the two layouts are discussed, with emphasis given to design considerations that improve audio function.

Please view the PDF document for more information.

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