Multilevel filter circuit

A filtering circuit and resistor technology, applied in the field of filtering, can solve the problems of unpredictable randomness, loss, and audio signal susceptibility to various interferences, and achieve the effect of eliminating bad signals and interference noise and improving anti-noise ability

Inactive Publication Date: 2017-06-13
宁波斯凯勒智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The requirements for the quality of transmitted audio information, especially voice information, are getting higher and higher; any mistakes in key language in important social activities will lead to irreparable losses; however, the randomness of the application is unpredictable, The accompanying noise interference brings troubles and inconvenience to...

Method used

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  • Multilevel filter circuit

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0009] See figure 1, a multi-stage filter circuit, including an input port Vin, an output port Vout, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, fourteenth resistor R14, fifteenth resistor R15, sixteenth resistor Resistor R16, seventeenth resistor R17, eighteenth resistor R18, nineteenth resistor R19, twentieth resistor R20, twenty-first resistor R21, twenty-second resistor R22, twenty-third resistor R23, second The fourteenth resistor R24, the twenty-fifth resistor R25, the twenty-sixth resistor R26, the twenty-seventh resistor R27, the twenty-eighth resistor R28, the first capacitor C1, the second capacitor C2...

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Abstract

The invention discloses a multilevel filter circuit. Good sensitivity is obtained through matching of multi-level operational amplifiers; and when an audio signal enters, various interference noises mixed in the audio signal are filtered. The filtering validity and anti-interference performance are ensured by setting good narrow-band band-pass; cut-off frequency of a high end and a low end is adjusted through a potentiometer; alternating current hums can be inhibited; bad signals and interference noises are eliminated; and the anti-interference capability of a circuit is improved.

Description

technical field [0001] The invention relates to the field of filtering, in particular to a multi-stage filtering circuit. Background technique [0002] With the rapid development of science and technology, more and more electronic products accompanied by audio information transmission have entered our production, life and various social activities. The requirements for the quality of transmitted audio information, especially voice information, are getting higher and higher; any mistakes in key language in important social activities will lead to irreparable losses; however, the randomness of the application is unpredictable, The accompanying noise interference brings trouble and inconvenience to high-quality voice information, which is almost insurmountable; and the audio signal is very vulnerable to various interferences during transmission, so it is urgent to improve the input transmission from the source of audio signal collection. The anti-noise ability of the system ca...

Claims

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Application Information

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IPC IPC(8): H03H11/38
CPCH03H11/38
Inventor 乐东岳张国锐
Owner 宁波斯凯勒智能科技有限公司
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