Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2006-10-10
2006-10-10
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C341S143000
Reexamination Certificate
active
07119608
ABSTRACT:
The invention relates to a forward-amplifying filter circuit which has an analogue filter with poles and zero points, having a first number of integrators which form the poles, which are arranged in series with one another and which each have an active component with a capacitance arranged in parallel therewith, having a second number of coefficients which form the zero points and which have at least one forward-amplifying path which contains a differentiating element, having a summing node whose input side is connected to the forward-amplifying paths of the zero points and whose output side is connected to the input of the last of the active components arranged in series. The invention also relates to an analog/digital converter circuit having such a filter circuit.
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Van De Plassche, R.: “Intergrated Analog-to-Digital and Digital-to-Analog Converters,” Boston, Dordrecht, London: Kluwer Academic Publishers, 1994, S. 432, ISBN 0-7923-9436-4.
Infineon - Technologies AG
Jenkins Wilson Taylor & Hunt, P.A.
Le Dinh T.
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