Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2011-06-21
2011-06-21
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S363000, C455S307000
Reexamination Certificate
active
07965134
ABSTRACT:
Exemplary embodiments of the invention disclose signal filtering. In an exemplary embodiment, a filter device may comprise a subtractor operably coupled between an input and an output and configured to receive an input signal comprising a desired component and at least one undesired frequency component. The filter device may further include a feedback loop configured to receive at least one of the input signal and an output signal from the subtractor and convey a feedback signal comprising at least one undesired component to the subtractor. Each undesired component of the feedback signal corresponds to an associated undesired component of the input signal. Furthermore, the subtractor subtracts the feedback signal from the input signal and convey the output signal.
REFERENCES:
patent: 5995567 (1999-11-01), Cioffi et al.
patent: 7483685 (2009-01-01), Lewis
patent: 2008/0233894 (2008-09-01), Aparin
patent: 1531553 (2005-05-01), None
International Search Report and Written Opinion—PCT/US2010/028738, International Search Authority—European Patent Office—Aug. 10, 2010.
Aparin Vladimir
Kim Nam-soo
Mathe Lennart K.
Donovan Lincoln
Hernandez William
Mobarhan Ramin
Qualcomm Incorporated
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