Filtering device and filtering method

A filtering device and pre-filtering technology, applied in the directions of sounding equipment, adaptive network, transmission system, etc., can solve the problems of large area and resistor cost, and achieve the effect of reducing noise

Active Publication Date: 2017-09-08
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

RC (Resistor-Capacitor, resistor-capacitor) LPF (Low-Pass Filter, low-pass filter) is the most common filter used to filter out unwanted noise, but in more advanced IC technology, resistors cost more large area

Method used

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  • Filtering device and filtering method
  • Filtering device and filtering method
  • Filtering device and filtering method

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Embodiment Construction

[0033] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] Certain terms are used in the description and claims of this application to refer to particular components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Include" and "comprising" mentioned throughout the specification and claims are open-ended terms, so they should be interpreted as "including (includi...

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Abstract

The invention provides a filtering device and a filtering method. The filtering device includes a low-pass filter (LPF), a noise estimation circuit and a 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 combining circuit subtracts the estimated noise signal from an input signal of the filtering device to generate the pre-filtering signal. Therefore, the area consumed by the filtering device can be effectively limited, and undesired noise can be effectively filtered out.

Description

technical field [0001] The invention relates to the technical field of circuit design, in particular to a filtering device and a filtering method. Background technique [0002] In IC (Integrated Circuit, integrated circuit) design, a circuit including hundreds of circuit modules must be designed in a limited area. RC (Resistor-Capacitor, resistor-capacitor) LPF (Low-Pass Filter, low-pass filter) is the most common filter used to filter out unwanted noise, but in more advanced IC technology, resistors cost more large area. Therefore, there is a need in the art for a filtering technology that can reduce the area of ​​a filter (such as an RC-based filter) while effectively filtering out unwanted noise. Contents of the invention [0003] In view of this, the embodiments of the present invention provide a filtering device and a filtering method, which can effectively limit the area consumed by the filtering device and effectively filter out undesired noise. [0004] An embod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/38H04L47/52
CPCH03H11/38H03H1/02H03H11/1213H03H11/1269H03H21/00H04L25/03057G10K2210/108H03H11/0461H04L25/03847H04L25/03993H04L47/522
Inventor 卢台祐
Owner MEDIATEK INC
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