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Apparatus and method for filtering noise in a signal

A signal and noise technology, applied to devices and fields used to filter noise in signals, can solve the problem of expensive FPGA and achieve easy-to-obtain effects

Active Publication Date: 2019-05-10
ABB (SCHWEIZ) AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, FPGAs are relatively expensive and require some development effort

Method used

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  • Apparatus and method for filtering noise in a signal
  • Apparatus and method for filtering noise in a signal
  • Apparatus and method for filtering noise in a signal

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Embodiment Construction

[0031] Reference will now be made in detail to several embodiments of the invention, examples of which are illustrated in the accompanying drawings. It should be noted that wherever practicable, similar or identical reference numerals may be used in the drawings and may indicate similar or identical functionality. The drawings depict various embodiments of the present disclosure, for purposes of illustration only. Those skilled in the art will readily recognize from the following description that alternative embodiments of the structures and methods shown herein may be employed without departing from the principles of the disclosure described herein.

[0032] figure 1 A schematic diagram of an apparatus 100 for filtering noise in a signal according to an embodiment of the present disclosure is illustrated.

[0033] According to this embodiment, if figure 1 As shown, the apparatus 100 includes a hysteretic filter circuit 110 for filtering hysteretic noise, an impulse noise f...

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Abstract

An apparatus (100) for filtering noises in a signal is disclosed. The apparatus comprises a hysteresis filter circuit (110) configured to filter hysteresis noises in an input signal to obtain a first signal;an impulse noise filter circuit (120) comprising a negative noise filter circuit (130) configured to filter negative impulse noises in the first signal to obtain a second signal,and a positive noise filter circuit (140) coupled with the negative noise filter circuit (130) in parallel, and configured to filter positive impulse noises in the first signal to obtain a third signal;and a combiner circuit (150)configured to combine the second signal and the third signal to obtain an output signal. With the apparatus and the method of this disclosure,different types of noises such as hysteresis noises,positive impulse noises as well as negative impulse noises can be filtered by using common electronic components which significantly improves cost effectiveness.

Description

technical field [0001] Various embodiments of the present disclosure relate to apparatus and methods for filtering noise in a signal, in particular for filtering both positive and negative impulse noise in an impulse signal. Background technique [0002] The Pulse Input Frequency Measurement Module is widely used in the process automation industry where pulse trains with various frequencies must be processed. Due to the complex electrical environment during use, there will be interference between the signals, which can lead to abnormal characteristics of signal processing, and these abnormal characteristics are often referred to as noise. [0003] For inputs with certain frequencies, noise can lead to inaccurate values ​​of the processed signal and to incorrect calculations. Since frequency is usually measured by counting the time interval between high and low levels, the presence of noise can lead to large signal variations, which are especially undesirable for critical pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B15/00
CPCH03K5/1252H03K5/24
Inventor 刘玮何亮阿克塞尔·洛贝克
Owner ABB (SCHWEIZ) AG