Complex filter with higher order pole
US7499963B2 · kind B2 · utility
2Cited by
4References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2004 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Feb 16, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2011/0494
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Pairs of second-order filters with feedback and cross coupling may be used to implement pairs of complex poles. The cross coupling may be frequency-dependent cross coupling or frequency-independent cross coupling. Frequency independent cross coupling may include coupling an internal node of a biquad filter. The pairs of second-order filters can be used together to form a complex filter. The complex filter can be used to readily provide higher order poles. The resulting complex filter can achieve higher order poles while offering reduced circuit complexity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.