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Universal filter

A filter, a general-purpose technology, applied in the field of filters, can solve problems such as difficulty in meeting chip miniaturization and high efficiency requirements, and large resource occupation

Pending Publication Date: 2018-10-19
SHANGHAI AWINIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The resource occupation is quite large, and it is difficult to meet the requirements of chip miniaturization and high efficiency in the field of audio design

Method used

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0049] The inventors of the present invention have found through research that: by deriving the filter function, it is possible to obtain a set of filter differential ...

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Abstract

The invention discloses a universal filter, comprising a data delay register unit, a time division multiplexing logic operation accumulation unit and a saturation operation unit, wherein the data delay register unit comprises two input ends and four output ends; the time division multiplexing logic operation accumulation unit comprises five data input ends and five filter parameter input ends; thetime division multiplexing logic operation accumulation unit is configured to output a second difference value at the last four beats of the predetermined beats of a clock signal, and the second difference value is obtained by subtracting the fourth and fifth products from the sum value of the first, second and third products, wherein the first product is a product of a digital input signal and afirst filter parameter; the second / third product is a product of a first / second delay digital input signal and a second / third filter parameter; and the fourth / fifth product is a product of a first / second delay digital output signal and a fourth / fifth filter parameter; and the saturation operation unit is configured to obtain a digital output signal according to the second difference value. By implementing the scheme of the invention, chip resources can be effectively saved, and data input signals can be effectively processed.

Description

technical field [0001] The invention relates to the technical field of filters, in particular to a general-purpose filter. Background technique [0002] As a basic module, filters are widely used in chips such as amplifiers, analog-to-digital converters, digital-to-analog converters, radio frequency, and sensors. The design of the general-purpose filter can flexibly obtain high-pass, low-pass, band-pass, and band-notch filters according to the configuration. The filter design can effectively process the filtering of digital signals and has been widely used. The transfer function of the general filter can be expressed as: [0003] [0004] By configuring b0, b1, b2, a1, and a2, different filter effects can be realized for the input signal whose frequency increases or decreases with time. figure 1 The design shown in the prior art shows that at least five multipliers, two accumulators, a signed saturation operation unit and a delay register unit are required. The resourc...

Claims

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Application Information

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IPC IPC(8): H03H11/38
CPCH03H11/38
Inventor 蒋松鹰姚炜
Owner SHANGHAI AWINIC TECH CO LTD
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