Earphone plugging noise suppression circuit
An earphone circuit and circuit technology, applied in the direction of transducer acoustic response prevention, etc., to achieve the effect of low production cost and noise reduction
Inactive Publication Date: 2015-08-26
DATANG TERMINAL TECH
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[0004] The purpose of this invention is to provide a kind of circuit that prevents earphon
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
[0018] like Figure 1-2 As shown, according to an embodiment of the present invention, a noise suppression circuit for earphone plugging and unplugging includes a noise control circuit 3 connected between the central processing unit 1 and the earphone interface circuit 2, wherein the noise control circuit 3 includes The MOS tube 4 connected to the earphone interface circuit 2, a triode 6 is connected in series between the MOS tube 4 and the power supply terminal 5, and a resistor one 7 and a ...
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The invention discloses an earphone plugging noise suppression circuit comprising a noise control circuit which is connected between a central processor and an earphone interface circuit. The noise control circuit comprises an MOS transistor which is connected with the earphone interface circuit. A triode is connected in series between the MOS transistor and a power end. A first resistor and a second resistor are connected in parallel between the triode and the MOS transistor. A third resistor is connected in series on the second resistor. The earphone interface circuit comprises a left channel interface circuit, a right channel interface circuit, an audio interface circuit and an input and output interface circuit which is connected with the central processor. The pin of the input and output interface circuit is connected with the pin of the audio interface circuit under the situation that an earphone is plugged in. The beneficial effects of the earphone plugging noise suppression circuit are that the earphone interface circuit is connected at the interface of the central processor, and the MOS transistor is also arranged on the earphone interface circuit so that noise in plugging of the earphone is further reduced. Besides, the earphone plugging noise suppression circuit is also low in manufacturing cost, and the requirements for various types of conversations can be met.
Description
technical field [0001] The invention relates to a noise suppression circuit for plugging and unplugging earphones. Background technique [0002] In the ever-changing modern life, various consumer entertainment electronic products emerge in an endless stream, among which there will inevitably be a voice headset function, but the voice headset circuit of the existing standard cylindrical headphone socket generally has an interface Sometimes there is a problem of noise. When the user wears the earphone interface to the mobile phone, he will inevitably hear large or small harsh interface noise; Come feel bad. The traditional circuit for suppressing the pop of the headphone jack cannot effectively solve this problem. Now we propose an effective circuit for suppressing the noise of the headphone jack. The combination of software and hardware can solve this problem well. At the same time, this circuit can intelligently identify whether the interface earphone is a three-segme...
Claims
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Inventor 张国华
Owner DATANG TERMINAL TECH