Earphone circuit and method for processing FM frequency band signals received by earphone

A processing method and headphone circuit technology, applied in electrical components, transmission systems, etc., can solve problems such as affecting listening, system noise interference, and treating the symptoms but not the root cause, so as to achieve the effect of enhancing the receiving strength and improving the receiving signal-to-noise ratio

Active Publication Date: 2010-12-15
HUIZHOU TCL MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing technology generally shields 104MHz radio stations through software,

Method used

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  • Earphone circuit and method for processing FM frequency band signals received by earphone
  • Earphone circuit and method for processing FM frequency band signals received by earphone
  • Earphone circuit and method for processing FM frequency band signals received by earphone

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] figure 1 A structural diagram of an earphone circuit provided by an embodiment of the present invention is shown.

[0023] Wherein, the circuit includes a first capacitor, wherein the first capacitor is three capacitors corresponding to the left and right channels of the baseband chip and the microphone: the first capacitor C3, the first capacitor C4 and the first The capacitor C5, the first capacitor C3, the first capacitor C4, and the first capacitor C5 are all 330 pf.

[0024] The circuit also includes a second capacitor, which is two capacitors corresponding to the left and right sound...

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PUM

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Abstract

The invention belongs to the technical field of FM signal processing, and discloses an earphone circuit and a method for processing FM frequency band signals received by an earphone. The method comprises the following steps of: performing low impedance processing on an FM frequency band noise signal coupled to an audio signal through a first capacitor; continuing to perform attenuation processing on the FM frequency band noise signal through magnetic beads to make the energy of the FM frequency band noise signal further reduced; and coupling the FM frequency band signals of a left channel and a right channel of the earphone through a second capacitor to make the strength of the FM frequency band signals increased. The method can inhibit the FM frequency band noise signal in a listening end system from transmitting outwards and enhance the receiving strength of useful FM frequency band signals, thereby effectively improving FM receiving signal-to-noise ratio.

Description

technical field [0001] The invention belongs to the technical field of FM signal processing, and in particular relates to an earphone circuit and a processing method for receiving FM frequency band signals thereof. Background technique [0002] With the continuous development of mobile terminal technology, users have higher and higher requirements on mobile terminal functions. [0003] Taking mobile phone receiving broadcast as an example, the existing mobile phone system generally uses 26MHz as the reference clock, and after frequency multiplication, a clock such as 104MHz or 208MHz is obtained as the main frequency of the CPU and the clock frequency of the memory. Therefore, when the mobile phone system is running, there are a large number of 104MHz frequencies in the system. Energy, which will affect other modules in the system through conduction and radiation, is the main source of interference in the mobile phone system. For example, the FM receiving frequency band is ...

Claims

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Application Information

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IPC IPC(8): H04B1/10
Inventor 顾瞻顾建良
Owner HUIZHOU TCL MOBILE COMM CO LTD
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