Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2011-03-08
2011-03-08
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S552000, C327S344000
Reexamination Certificate
active
07902917
ABSTRACT:
Embodiments of the present invention relate generally to reconstruction filtering. In particular, embodiments enable highly linear, highly programmable, and easily reconfigurable reconstruction filters. Further, embodiments provide substantial power consumption, area, and cost savings compared to conventional solutions. For example, embodiments use all-passive filtering and substantially reduce active elements compared to conventional solutions. As a result, significant reductions in required area, noise, and power consumption can be achieved. In addition, embodiments perform filtering solely in the current domain, thereby eliminating the non-linear voltage-to-current conversion used in conventional circuits and enabling highly linear filtering. Furthermore, embodiments are highly programmable and easily reconfigurable without the use of tunable capacitors. As such, embodiments are very suitable solutions for multi-band multi-mode wireless transmitters.
REFERENCES:
patent: 7049882 (2006-05-01), Pan
patent: 7218170 (2007-05-01), Carter et al.
patent: 7555271 (2009-06-01), Peng
patent: 2009/0189687 (2009-07-01), Mirzaei et al.
Darabi Hooman
Mirzaei Ahmad
Broadcom Corporation
Le Dinh T.
Sterne Kessler Goldstein & Fox P.L.L.C.
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