CN105357603A - Compatible European standard and national standard earphone - Google Patents
Compatible European standard and national standard earphone Download PDFInfo
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- CN105357603A CN105357603A CN201510811199.0A CN201510811199A CN105357603A CN 105357603 A CN105357603 A CN 105357603A CN 201510811199 A CN201510811199 A CN 201510811199A CN 105357603 A CN105357603 A CN 105357603A
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Abstract
The invention discloses a compatible European standard and national standard earphone. According to the compatible European standard and national standard earphone, an automatic conversion circuit is employed, an input interface is made to realize reversal connection, and no influence is exerted on output signals. A problem of hardware incompatibility during reversal of order of microphones and ground wires of mobile terminal earphone interfaces in two standards can be solved, in a solution process, no wire jumping or setting is needed, no influence is exerted on circuit signal quality, and cost is low. Through the compatible European standard and national standard earphone, an intelligent compatible device having two standard interfaces can be realized.
Description
Technical field
The present invention relates to the earphone of compatible Europe superscript and GB, particularly relate to the earphone of a kind of compatible Europe superscript and GB, belong to the earphone field of compatible Europe superscript and GB.
Background technology
At present, the earphone jack that the physical dimension of the terminal equipment such as computer, mobile phone, MP3, MP4, PSP is identical has two kinds of interface standards, and corresponding earphone can only support a kind of interface standard simultaneously.On microphone signal, there will be the problem that earphone cannot normally use, make earphone not possess versatility.The 3.5mm four-section type headset used in daily life is divided into two kinds of standards: Europe superscript (OMTP): OMTP earphone is a kind of standard containing microphone earphone that OMTP (OMTP) is formulated in order to unified mobile device interface standard, is the most common earphone arrived on current mobile phone.GB (CTIA): corresponding with this standard is CTIA interface standard.Equally, the plug of CTIA standard is also divided into 4 sections, is from the beginning respectively to bottom: L channel, R channel, ground connection, microphone.
4 sections of current stereophone interfaces are adopted international standards the type different with domestic standard two kinds, and the tip of the earphone interface plug of this two type defines identical with ring in first, and tip is all defined as L channel, and in first, ring is all defined as R channel; In second, ring is defined as ground wire in international standard, is defined as microphone at home in standard; The end of plug is defined as microphone in international standard, is defined as ground wire at home in standard.For embodiments of the invention, no matter adopt the interface of which kind of standard definition, all can compatiblely use, no matter be first input end earth connection, the second input is answered cylinder, or first input end is answered cylinder, second input end grounding line, signal is after automatic switching circuit, and exporting and being fixed as the first output is all the time that microphone exports, and the second output is ground wire.
Summary of the invention
Technical problem to be solved by this invention is the earphone providing a kind of compatible Europe superscript and GB for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
An earphone for compatible Europe superscript and GB, comprises input interface, output interface and automatic switching circuit; Described input interface to comprise in tip, first ring and end in ring, second; Described output interface comprises L channel, R channel, microphone and ground wire; Described automatic switching circuit has first input end and the second input, and the first output and the second output; Described input interface second in ring be connected with two inputs of described automatic switching circuit with end; The microphone of described output interface is connected with two outputs of described automatic switching circuit with ground wire;
Described automatic switching circuit comprises the first transistor, transistor seconds, third transistor, the 4th transistor; Described the first transistor drain electrode is connected with first input end, and source electrode is connected with the second output, and grid is connected with the second input; Described transistor seconds drain electrode is connected with the second input, and source electrode is connected with the second output, and grid is connected with first input end; Described third transistor drain electrode is connected with first input end, and source electrode is connected with the first output, and grid is connected with the second input; Described 4th transistor drain is connected with the second input, and source electrode is connected with the first output, and grid is connected with first input end;
Wherein, described automatic switching circuit is used for the signal that described distinct interface standard headphone jack and described earphone send to be automatically converted to the Received signal strength matched each other.
As the further preferred version of the earphone of a kind of compatible Europe superscript of the present invention and GB, described the first transistor and transistor seconds all adopt enhancement mode N-channel MOS pipe.
As the further preferred version of the earphone of a kind of compatible Europe superscript of the present invention and GB, described third transistor and the 4th transistor all adopt P channel MOS tube.
As the further preferred version of the earphone of a kind of compatible Europe superscript of the present invention and GB, between the grid of described the first transistor and third transistor and the second input, access resistance.
As the further preferred version of the earphone of a kind of compatible Europe superscript of the present invention and GB, between resistance value 0 Ω to 100 Ω between the grid of described transistor and input.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, the technical scheme that provides of the embodiment of the present invention, by adopting automatic switching circuit, makes input interface reversal connection, on output signal without impact.When solving microphone and the ground wire reversed order of the mobile terminal earphone interface of two kinds of standards, the problem that hardware can not be compatible, in solution process, without the need to wire jumper or setting, not to affect circuit signal quality and cost is low.Achieve the device of the compatible two kinds of standard interfaces of a kind of intelligence.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention;
Fig. 2 is the circuit diagram of automatic switching circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, the earphone of a kind of compatible Europe superscript and GB, comprises input interface, output interface and automatic switching circuit; Described input interface to comprise in tip, first ring and end in ring, second; Described output interface comprises L channel, R channel, microphone and ground wire; Described automatic switching circuit has first input end and the second input, and the first output and the second output; Described input interface second in ring be connected with two inputs of described automatic switching circuit with end; The microphone of described output interface is connected with two outputs of described automatic switching circuit with ground wire;
As shown in Figure 2, described automatic switching circuit comprises the first transistor, transistor seconds, third transistor, the 4th transistor; Described the first transistor drain electrode is connected with first input end, and source electrode is connected with the second output, and grid is connected with the second input; Described transistor seconds drain electrode is connected with the second input, and source electrode is connected with the second output, and grid is connected with first input end; Described third transistor drain electrode is connected with first input end, and source electrode is connected with the first output, and grid is connected with the second input; Described 4th transistor drain is connected with the second input, and source electrode is connected with the first output, and grid is connected with first input end;
Wherein, described automatic switching circuit is used for the signal that described distinct interface standard headphone jack and described earphone send to be automatically converted to the Received signal strength matched each other.
Wherein, described the first transistor and transistor seconds all adopt enhancement mode N-channel MOS pipe, described third transistor and the 4th transistor all adopt P channel MOS tube, resistance is accessed, between resistance value 0 Ω to 100 Ω between the grid of described transistor and input between the grid of described the first transistor and third transistor and the second input.
4 sections of current stereophone interfaces are adopted international standards the type different with domestic standard two kinds, and the tip of the earphone interface plug of this two type defines identical with ring in first, and tip is all defined as L channel, and in first, ring is all defined as R channel; In second, ring is defined as ground wire in international standard, is defined as microphone at home in standard; The end of plug is defined as microphone in international standard, is defined as ground wire at home in standard.For embodiments of the invention, no matter adopt the interface of which kind of standard definition, all can compatiblely use, no matter be first input end earth connection, the second input is answered cylinder, or first input end is answered cylinder, second input end grounding line, signal is after automatic switching circuit, and exporting and being fixed as the first output is all the time that microphone exports, and the second output is ground wire.
The circuit diagram of the automatic switching circuit module that the preferred embodiment of the present invention provides.As its name suggests, this circuit is a kind of automatic switching circuit.General principle is, using four switching devices as brachium pontis, full-bridge type connects, using input signal as control signal, the conducting of control switch device and cut-off, make output selectively export the signal inputted above, put upside down even if realized the input port order of connection, output signal still can select fixing port by definition.
The technical scheme that the embodiment of the present invention provides, by adopting automatic switching circuit, makes input interface reversal connection, on output signal without impact.When solving microphone and the ground wire reversed order of the mobile terminal earphone interface of two kinds of standards, the problem that hardware can not be compatible, in solution process, without the need to wire jumper or setting, not to affect circuit signal quality and cost is low.Achieve the device of the compatible two kinds of standard interfaces of a kind of intelligence.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. an earphone for compatible Europe superscript and GB, is characterized in that: comprise input interface, output interface and automatic switching circuit; Described input interface to comprise in tip, first ring and end in ring, second; Described output interface comprises L channel, R channel, microphone and ground wire; Described automatic switching circuit has first input end and the second input, and the first output and the second output; Described input interface second in ring be connected with two inputs of described automatic switching circuit with end; The microphone of described output interface is connected with two outputs of described automatic switching circuit with ground wire;
Described automatic switching circuit comprises the first transistor, transistor seconds, third transistor, the 4th transistor; Described the first transistor drain electrode is connected with first input end, and source electrode is connected with the second output, and grid is connected with the second input; Described transistor seconds drain electrode is connected with the second input, and source electrode is connected with the second output, and grid is connected with first input end; Described third transistor drain electrode is connected with first input end, and source electrode is connected with the first output, and grid is connected with the second input; Described 4th transistor drain is connected with the second input, and source electrode is connected with the first output, and grid is connected with first input end;
Wherein, described automatic switching circuit is used for the signal that described distinct interface standard headphone jack and described earphone send to be automatically converted to the Received signal strength matched each other.
2. the earphone of a kind of compatible Europe superscript according to claim 1 and GB, is characterized in that: described the first transistor and transistor seconds all adopt enhancement mode N-channel MOS pipe.
3. the earphone of a kind of compatible Europe superscript according to claim 1 and GB, is characterized in that: described third transistor and the 4th transistor all adopt P channel MOS tube.
4. the earphone of a kind of compatible Europe superscript according to claim 1 and GB, is characterized in that: access resistance between the grid of described the first transistor and third transistor and the second input.
5. the earphone of a kind of compatible Europe superscript according to claim 1 and GB, is characterized in that: between resistance value 0 Ω to 100 Ω between the grid of described transistor and input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811199.0A CN105357603A (en) | 2015-11-20 | 2015-11-20 | Compatible European standard and national standard earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510811199.0A CN105357603A (en) | 2015-11-20 | 2015-11-20 | Compatible European standard and national standard earphone |
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| Publication Number | Publication Date |
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| CN105357603A true CN105357603A (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510811199.0A Pending CN105357603A (en) | 2015-11-20 | 2015-11-20 | Compatible European standard and national standard earphone |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404665A (en) * | 2010-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | Earphone interface self-adaptation circuit |
| EP2503790A2 (en) * | 2011-03-15 | 2012-09-26 | Samsung Electronics Co., Ltd. | Earphone system for mobile devices |
| CN102882090A (en) * | 2012-10-15 | 2013-01-16 | 信雅达系统工程股份有限公司 | Device compatible with earphone interfaces |
| CN202713580U (en) * | 2012-04-09 | 2013-01-30 | 广东步步高电子工业有限公司 | Earphone compatible interface circuit for terminal device |
-
2015
- 2015-11-20 CN CN201510811199.0A patent/CN105357603A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102404665A (en) * | 2010-09-07 | 2012-04-04 | 中兴通讯股份有限公司 | Earphone interface self-adaptation circuit |
| EP2503790A2 (en) * | 2011-03-15 | 2012-09-26 | Samsung Electronics Co., Ltd. | Earphone system for mobile devices |
| CN202713580U (en) * | 2012-04-09 | 2013-01-30 | 广东步步高电子工业有限公司 | Earphone compatible interface circuit for terminal device |
| CN102882090A (en) * | 2012-10-15 | 2013-01-16 | 信雅达系统工程股份有限公司 | Device compatible with earphone interfaces |
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Application publication date: 20160224 |
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