Anti-interference mobile phone microphone

A microphone and mobile phone technology, applied in the field of communication, can solve problems such as unsatisfactory filtering effect, internal damage of microphone and mobile phone, etc., and achieve good shielding effect

Inactive Publication Date: 2015-06-24
邝嘉怡
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the opening of the microphone faces directly outward, the inside of the microphone and the inside of the phone are easily damaged by sta

Method used

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[0018] The present invention provides an anti-interference mobile phone microphone. In order to make the objectives, technical solutions and effects of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0019] The microphone of the present invention is arranged at the lower end of the mobile phone, and the microphone has the functions of antistatic and anti-radio frequency interference.

[0020] See figure 2 , The microphone includes a metal shell 110, inside the metal shell is provided an ECM module ECM, a transistor Q1, a first resistor R1, a second resistor R2, and a third resistor R3, the metal shell 110 is provided with a first A capacitor C1, the metal shell 110 is provided with a ground terminal GND. T...

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Abstract

The invention discloses an anti-interference mobile phone microphone. The anti-interference mobile phone microphone comprises a metal shell, wherein an ECM, a triode, a first resistor, a second resistor and a third resistor are arranged in the metal shell, a first capacitor is arranged outside the metal shell, and a grounding terminal is arranged on the metal shell; the base electrode of the triode is grounded through the ECM, the collector electrode of the triode is connected with a VCC power supply end and one end of the second resistor through the first resistor, and the other end of the second resistor is connected with a Vs power supply end and is also connected with the output end of the mobile phone microphone through the first capacitor; the emitting electrode of the triode is grounded through the third resistor, and the grounding terminal is connected to the ground where a mobile phone mainboard is located; the ECM and the metal shell are not located on the same ground. According to the anti-interference mobile phone microphone, due to the fact that the metal shell of the microphone is connected to the ground where the mobile phone mainboard is located, breakover between the ground where the metal shell is located and the ground where a microphone circuit is located is avoided, and a good shielding effect is achieved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an anti-jamming mobile phone microphone. Background technique [0002] At present, it is more and more common for mobile phones to use mono pole antennas (single-polarized antennas), and generally the mono pole antenna and the microphone are set at the bottom of the mobile phone, so that the microphone is easily interfered by the radio frequency noise radiated by the antenna. This interference is commonly known as Current sound. [0003] see figure 1 , the traditional microphone includes a metal shell 100, a field effect transistor Q is arranged in the metal shell 100, the gate G of the field effect transistor Q is grounded through an EMC module (Electromagnetic Compatibility, electromagnetic compatibility), and the drain D is grounded through a The capacitor C is connected to its output port, and the source S of the field effect transistor Q is directly grounded. The me...

Claims

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Application Information

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IPC IPC(8): H04M1/03H04M1/19
Inventor 邝嘉怡
Owner 邝嘉怡
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