Analysis of a low-pass filter employing a 4-pin capacitor |
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Authors: | Zeeff TM Ritter A Hubing TH Van Doren T |
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Affiliation: | Hewlett-Packard Co., San Diego, CA, USA; |
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Abstract: | Capacitors with two or three leads tend to make poor low-pass filters at high frequencies (e.g., >100 MHz) due to the mutual inductance between the input and output sides of the filter. This work proposes a four-lead low-pass filter capacitor design that minimizes the magnetic flux coupling between the input and output. Measurements of a prototype capacitor confirm that it performs significantly better than a typical two-lead capacitor at high frequencies. |
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