Method of eliminating a DC component and filtering device obtained by this method
US7058382B2 · kind B2 · utility
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7References
8Claims
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Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Nov 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/165
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A radiotelephony device employing filters and methods for eliminating a DC component from an electronic signal provide for circuitry having a zero corresponding to a cut-off frequency, and circuitry for shifting the zero by an amount corresponding to the absolute value of that cut-off frequency. In such radiotelephony device, the filters and methods, which include integration and operation of gyrators, tend to be (a) suited for incorporation in integrated circuits by virtue of reducing the physical size of the required capacitors and (b) reduce time-dependent inertia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.