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Noise gate circuit system and designing method thereof

A circuit system and noise gate technology, applied in transducer circuits, electrical components, sensor components, etc., can solve problems such as being unfavorable to the promotion of consumer-level circuits, high production costs, and complex noise gate circuit system technology. Low power consumption, easy integration, overcoming the effect of large offset voltage

Active Publication Date: 2011-07-13
AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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AI Technical Summary

Problems solved by technology

However, to achieve accurate noise gate control, it is necessary to design a complex low noise precision op amp, such as chopping method to cancel the offset voltage
The noise gate circuit system designed by the BiCOMS process is complex in process and high in production cost, which is not conducive to popularization in consumer-level circuits

Method used

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  • Noise gate circuit system and designing method thereof
  • Noise gate circuit system and designing method thereof
  • Noise gate circuit system and designing method thereof

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] The function of the noise gate circuit is as follows. The noise source is generally far away from the microphone, and the noise signal it emits is transmitted through the air, attenuated and then enters the microphone; while the useful signal, such as the sound signal emitted by a person, is close to the microphone, so it propagates through the air to the microphone. attenuation is small. Therefore, there is a large difference in the energy amplitude of the noise signal and the useful sound signal. When the circuit detects only a lower level of signal energy, it considers that there is only environmental noise. At this time, the circuit signal output is turned off to achieve zero output; when the circuit detects a higher level of signal energy When the level of signal energy is high, it is considered that there is a useful sound signal, and the c...

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Abstract

The invention provides a noise gate circuit system which comprises a head amplifier circuit for amplifying an electric signal and a signal processing circuit unit for processing the electric signal, wherein the signal processing circuit unit is provided with a full-wave rectification circuit unit, a filter circuit unit, a comparer circuit unit and a reference voltage generating circuit unit. The invention also provides a designing method based on the noise gate circuit system. Compared with relevant technologies, the noise gate circuit system and the designing method thereof have the advantages of low power consumption, low production cost, easiness in integration and high control accuracy.

Description

【Technical field】 [0001] The invention relates to a circuit system and a design method thereof, in particular to a noise gate circuit system and a design method thereof applied to microelectronic devices. 【Background technique】 [0002] With the development of wireless communication, there are more and more mobile phone users around the world. The requirements of users for mobile phones are not only satisfied with calls, but also to be able to provide high-quality call effects. Especially the current development of mobile multimedia technology, the mobile phone Call quality is even more important. [0003] Due to the existence of a large amount of environmental noise, the signal-to-noise ratio of the voice signals collected by the microphones of mobile phones and other communication devices is generally not high enough. Especially in high-noise environments such as street cars, it is necessary to increase the volume to make the other party hear clearly. Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
Inventor 杨勇刚林海司鹏飞
Owner AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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