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General programmable digital filter and its working method

A technology of digital filter and working method, applied in the direction of digital technology network, impedance network, electrical components, etc., can solve the problems of complex board-level design and verification, increase system design cost, lack of versatility, etc., and improve real-time response , Reduce the use of analog components and improve the accuracy

Inactive Publication Date: 2006-11-22
WUHU SANMU ELECTRONICS SCI & TECH
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  • Claims
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Problems solved by technology

This not only increases the design cost of the system, but also makes the board-level design and verification of the system more complicated
Although some ASIC (application-specific integrated circuit) chips have dedicated hardware digital filters inside, which can solve real-time problems, they can only be used in specialized fields, lack versatility, and are expensive

Method used

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  • General programmable digital filter and its working method

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The functional modules of the present invention are connected as shown in the accompanying drawings. The detailed functions of each functional module are described as follows: Port selector 1: The function of the port selector is to receive external control input signals, decode the output, and select the current data signal flowing out of the input module 3 to flow into the control register 2 and the filter parameter register Bank 4 is also Bank 5 of the input signal registers.

[0033] Control register 2: The control register saves the current digital filter structure, order, cascaded use and other filter characteristic information codes, and outputs each information to the FIR / IIR selection controller 7 and the shift controller 8 respectively.

[0034] Input module 3: Receive externally input data signals, the data signals may be filter characteristic info...

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Abstract

The invention discloses a general purpose programmable digit filter and working method, which is characterized by the following: the invention is composed of 9 functional modulars; the working method consists of two working methods: allocation method and filtering duty; the invention improves the stability, anti-interference ability and accuracy and avoids internal noise of electric filter system effecting the filtering signal; the invention uses many hardware multiplicators and accumulators to realize filtering calculation, which improves the response real-time ability.

Description

technical field [0001] The invention relates to a filter and its working method, in particular to a general programmable digital filter device and its working method. Background technique [0002] A filter is an electronic device that can pass useful signals smoothly while suppressing (or attenuating) unwanted frequency signals. It is commonly used in engineering for signal processing, data transmission and interference suppression. In measurement and communication systems, a filter is essentially an electronic device that can extract the information carried by the original signal from a signal that has been distorted and polluted by noise. [0003] Filters can be divided into analog filters and digital filters. [0004] An analog filter can be defined as an electronic device that is mainly composed of analog components and performs analog calculations on analog signals to complete signal filtering and processing functions. [0005] In contrast, a digital filter can be de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02
Inventor 许金生
Owner WUHU SANMU ELECTRONICS SCI & TECH
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