Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2005-03-29
2005-03-29
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
Reexamination Certificate
active
06873205
ABSTRACT:
An active filter (100) is disclosed with improved blocker signal rejection characteristics. Linear resistors, such as fixed value resistors (3, 4) are used at the input stage (72) of the filter (100) to suppress any blocker signal. A gain compensation stage (57) is added to the output stage (23) using resistors (24) fabricated with the same technology used to fabricate the input resistors (3, 4) in order to offset any gain changes associated with the input fixed value resistors (3, 4). In an exemplary embodiment, the fixed value resistors (3, 4) are fabricated using polysilicon.
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Tsividis Yannis
Yoshizawa Atsushi
Le Dinh T.
Sony Corporation
The Trustees of Columbia University in the City of New York
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