Forward-amplifying filter circuit
AssigneeInfineon Technologies AG
InventorLukas Doerrer
Life of this patent
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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.
Claims20
A forward-amplifying filter circuit which has an analog filter having poles and zero points, having:
- (a) an input terminal for inputting an input signal;
- (b) a first number of integrators which form the poles of the analog filter, which are connected in series with one another and which each have an active component with a capacitance arranged in parallel therewith;
- (c) a second number of coefficients which form the zero points of the analog filter and which have at least one forward-amplifying path which contains a differentiating element;
- (d) a summing node being connected to the forward-amplifying paths of the zero points and being also connected to the input of the last of the active components arranged in series with one another;
- and
- (e) an output terminal for outputting an output signal, the output terminal being connected with the output of the last of the active components.
Dependencies are inferred from the claim text.