Integrated RF notch filters

Details Integrated RF notch filters Integrated RF notch filters

2011-08-16

2011-08-16

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Unwanted signal suppression

C327S552000, C455S307000

Reexamination Certificate

active

07999608

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.

REFERENCES:
patent: 7389098 (2008-06-01), Oh et al.
patent: 7522024 (2009-04-01), Beffa
patent: 7885629 (2011-02-01), Ojo et al.
patent: 2008/0079497 (2008-04-01), Fang et al.

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