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Signal filter, filtering method and signal monitoring system

A signal filter and signal technology, applied in the electronic field, can solve the problem of wasting the differential input range of the AD converter 104, etc.

Active Publication Date: 2014-07-30
AOTU ELECTRONICS WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the signal monitoring system 100, half of the differential input range of the AD converter 104 is wasted, for example: the range of -5V to 0V

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  • Signal filter, filtering method and signal monitoring system
  • Signal filter, filtering method and signal monitoring system
  • Signal filter, filtering method and signal monitoring system

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Embodiment Construction

[0042] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, so as to make the characteristics and advantages of the present invention more obvious.

[0043] A detailed description will be given below of embodiments of the present invention. While the invention will be described in conjunction with examples, it will be understood that it is not intended to limit the invention to these examples. On the contrary, the invention is intended to cover various alternatives, modifications and equivalents as defined within the spirit and scope of the invention as defined by the claims.

[0044] Furthermore, in the following detailed description of the invention, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific...

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Abstract

A signal filter, a filtering method and a signal monitoring system, the signal filter includes: a node for selectively receiving a first input signal and a first reference signal; a first end for providing signal and a first output signal determined by said first reference signal; a second terminal for receiving a feedback signal representing said first output signal; and an energy storage circuit connected to said node, said first terminal and said coupled to the second end, for generating the first output signal at the first end according to the first input signal and the first reference signal, and for alternately receiving the A first input signal and the feedback signal are received via the second terminal, wherein a dominant pole frequency of the signal filter is controlled by alternating frequencies of the first input signal and the feedback signal. The invention can not only speed up the response speed of the monitoring system, but also improve the monitoring accuracy of the monitoring system.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a signal filter, a filtering method and a signal monitoring system. Background technique [0002] figure 1 A prior art signal monitoring system 100 is described. The signal monitoring system 100 includes a differential resistor-capacitor low-pass filter (resistor-capacitor low-pass filter, RC low-pass filter for short) 102 and a differential analog-to-digital converter (analog-to-digital converter, AD converter for short) 104. The AD converter 104 includes an input terminal INP and an input terminal INN connected to the RC low-pass filter 102 . RC low pass filter 102 receives the input signal V IN , to block or reduce the input signal mixed in V IN of high frequency noise, and the input signal V IN The low frequency part of V’ IN Passed to the AD converter 104. RC low pass filter 102 can generate output signal V OUT1 and the output signal V OUT2 , and the control ou...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H9/46
CPCH03H19/004G01R31/3658G01R31/396G01R31/3835
Inventor 栗国星
Owner AOTU ELECTRONICS WUHAN