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How to model, apply capacitor-bypass networks (4)

Posted: 15 Oct 2007     Print Version  Bookmark and Share

Keywords:bypass capacitor  bypass network  modelling 

Recall the basics: a bypass capacitor is employed to conduct alternating current around a component or group of components. Also known as filter capacitors, bypass capacitors are found in every piece of electronic equipment because there are always systems, circuits and individual ICs that need to be bypassed, to ensure that AC noise is dampened.

In every situation or application, there is no substitute for accurate modelling and simulation. When taking into account all of the parasitics of the packages and printed circuit board, a true picture can be made of the frequency response of the power supply. Some surprising interactions appear when modelling a real bypass network. This paper presents these interactions to help the designer minimise them appropriately for the desired application

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