Method and device for carrying out electrostatic protection on microphone
A technology for electrostatic protection and microphones, which is applied to electrical components, transducer circuits, sensors, etc., can solve the problems of increasing structural design costs, reducing the use value of microphones, and affecting the sensitivity of microphones, so as to improve cost performance and increase structural design costs Effect
Active Publication Date: 2018-11-16
MOBVOI INFORMATION TECH CO LTD
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Problems solved by technology
[0003] At present, in the process of completing the mandatory certification of ESD testing for audio equipment, metal shielding is usually added to the outer surface of the built-in microphone, and the metal shield is grounded, so as to use the metal shield to provide an electrostatic discharge path to prevent the microphone from being damaged during the ESD test. Unstable operation or even damage due to electrostatic discharge
However, adding a metal shield will greatly affect the sensitivity of the microphone, reduce the use value of the microphone, and increase the structural design cost, which will greatly reduce the cost performance of the microphone.
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[0048] Exemplary embodiments of embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While the drawings show exemplary embodiments of the invention, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the embodiments of the present invention and to fully convey the scope of the embodiments of the present invention to those skilled in the art.
[0049] An embodiment of the present invention provides a method for electrostatic protection of a microphone, such as figure 1 As shown, the method is to transfer the accumulated electrostatic charge on the outer surface of the microphone to the reference ground of the printed circuit board, so as to timely and efficiently complete the release of a large amount of accumulated electrostatic charg...
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The embodiment of the invention discloses a method and device for carrying out electrostatic protection on a microphone, and relates to the technical field of electrostatic protection. Electrostatic discharge on the microphone is completed in time and efficiently without adding additional cost, so as to achieve the electrostatic protection of the microphone, and meanwhile, the radio sensitivity ofthe microphone is not influenced, and the cost performance of the microphone is greatly improved. The main technical scheme of the embodiment of the invention is as follows: monitoring an electrostatic voltage present on the outer surface of the microphone, wherein the electrostatic voltage is generated according to electrostatic charges accumulated on the outer surface of the microphone; judgingwhether the value of the electrostatic voltage is greater than a first preset threshold; and if yes, transferring the accumulated electrostatic charges to a reference ground of a printed circuit board. The method for carrying out the electrostatic protection on the microphone provided by the embodiment of the invention is mainly used for performing electrostatic protection on the microphone on the printed circuit board.
Description
technical field [0001] The embodiments of the present invention relate to the technical field of electrostatic protection, and in particular, to a method and device for electrostatic protection of a microphone. Background technique [0002] The generation of static electricity in industrial production is inevitable, such as contact, friction or induction electrification, etc., making objects with different electrostatic potentials close to each other or directly contacting each other will cause charge transfer to generate electrostatic discharge, and electrostatic discharge will also give Industrial production causes hazards, such as causing electronic equipment failures, causing electromagnetic interference, and so on. Therefore, it is usually necessary to conduct an Electro-Static discharge (ESD) test on the electronic equipment before leaving the factory, in order to complete the compulsory certification of product quality, and then ensure that the user can eliminate the ...
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IPC IPC(8): H04R1/08H04R3/00
CPCH04R1/08H04R3/00
Inventor 孟德成
Owner MOBVOI INFORMATION TECH CO LTD