Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2006-08-22
2008-10-14
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S551000
Reexamination Certificate
active
07436249
ABSTRACT:
A circuit for filtering a radio frequency signal at a given frequency comprises an input terminal, a filter device, and an active AC shunt circuit having first and second input terminals and an output terminal, where the first input terminal of the active AC shunt circuit is connected to the input terminal. The filter device is connected between the input terminal and the second input terminal of the active AC shunt circuit, and is provided for attenuating the radio frequency signal at the given frequency to the second input terminal of the active AC shunt circuit. The active AC shunt circuit is provided for shunting a signal at a frequency other than the given frequency as contained in the radio frequency signal to ground, and for outputting the radio frequency signal as filtered at its output terminal.
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Peng, Fang Z. and Donald J. Adams. “Harmonic Sources and Filtering Approaches-Series/Parallel, Active/Passive, and Their Combined Power Filters.” Conference Record-IEEE Industry Applications Society 34th Annual Meeting: Phoenix, Arizona, Oct. 1999. (pp. 448-455).
Wenzel Associates, Inc. “Finesse Voltage Regulator Noise!” XP002364872, Jan. 2001. <www.wenzel.com/documents/finesse.html> (pp. 1-4).
Infineon - Technologies AG
Le Dinh T.
Maginot Moore & Beck
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