Filtering device and method of eliminating a DC component by shifting the transfer function
US6545569B1 · kind B1 · utility
1Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 3, 1999 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Dec 3, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/165
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
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. The filters and methods, which include integration and operation of gyrators, are particularly well-suited for incorporation in integrated circuits by virtue of reducing the physical size of the required capacitors. A further advantage is the reduction of time-dependent inertia. Applications of the filters and methods include, but are not limited to, radiotelephony.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.