Integrated RF notch filters
US7999608B1 · kind B1 · utility
8Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2009 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Jul 1, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2011/0488
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for providing integrated RF notch filter subsystems having enhanced Q values are described. An integrated notch filter includes an LC filter element and a Q-enhancement circuit coupled to the LC filter element, with the Q-enhancement circuit configured to offset resistive losses in the LC filter element to adjust the Q value of the filter system. A transceiver having multiple LNAs for various bands may be provided to a single notch filter system including a Q-enhancement circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.