Method for selecting a ferrite bead for a filter
US7657564B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2006 |
| Grant date | Feb 2, 2010 |
| Priority date | — |
| Expiry date | Sep 15, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2260/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for selecting a ferrite bead for a filter to avoid a peak value in a frequency response curve of the filter is provided. The method includes the steps of: building an equivalent model database including parameters of equivalent models of ferrite beads, the parameters including an inductance and a capacitance of a corresponding equivalent model of each ferrite bead; calculating parameters of a desired ferrite bead in the filter based on parameters of the filter, the parameters of the ferrite bead including an inductance, a capacitance, and a resonant frequency; adjusting parameters of the filter until the calculated resonant frequency equals or approaches a desired resonant frequency, and finding an inductance and a capacitance respectively equaling or approaching the calculated inductance and the calculated capacitance in the database; and selecting a ferrite bead with the appropriate inductance and capacitance as found in the database for the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.