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US 2018/0123838 A1Published application
Feed-forward filtering device and associated method
AssigneeMediatek Inc.
InventorTai-You Lu
Life of this patent
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Abstract
A filtering device includes a low-pass filter (LPF), a noise estimation circuit and a first combining circuit. The LPF receives and filters a pre-filtering signal to generate an output signal of the filtering device. The noise estimation circuit estimates an estimated noise signal according to the output signal and the pre-filtering signal. The first combining circuit subtracts the estimated noise signal from an input signal of the filtering device to generate the pre-filtering signal.
Claims14
A filtering device, comprising:
- a low-pass filter (LPF), arranged to receive and filter a pre-filtering signal from an interconnection node to generate an output signal of the filtering device;
- a feedback circuit, arranged to receive the output signal to generate a feedback signal;
- and
- a resistor circuit, coupled between an input signal of the filtering device and the feedback signal to generate the pre-filtering signal at the interconnection node;
- wherein the input signal, the pre-filtering signal and the output signal are voltage signals.
2 more elements
A filtering method, comprising:
- performing a low-pass filtering (LPF) operation upon a pre-filtering signal from an interconnection node to generate an output signal;
- generating a feedback signal according to the output signal;
- and
- using a resistor circuit coupled between an input signal and the feedback signal to generate the pre-filtering signal at the interconnection node;
- wherein the input signal, the pre-filtering signal and the output signal are voltage signals.
2 more elements
Dependencies are inferred from the claim text.