CN203942627U - Multiple microphones are shared the Headphone device of same emulation bus - Google Patents
Multiple microphones are shared the Headphone device of same emulation bus Download PDFInfo
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- CN203942627U CN203942627U CN201420231477.6U CN201420231477U CN203942627U CN 203942627 U CN203942627 U CN 203942627U CN 201420231477 U CN201420231477 U CN 201420231477U CN 203942627 U CN203942627 U CN 203942627U
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Abstract
Multiple microphones are shared the Headphone device of same emulation bus, are specifically related to a kind of Headphone device.Wherein, comprise at least two microphones, for sensing external sound information to be converted to the signal of telecommunication; Modulating unit, the output of each microphone connects a modulating unit, for one carrier signal being modulated to rear transmission according to the signal of telecommunication of microphone output; Signal adder, is connected with the output of modulating unit, and the signal after modulation is added, and transmits to share same transmission line; Interface connector, provides the splicing ear being electrically connected with outer audio equipment, and interface connector is provided with the first link, and the first link is connected with the output of signal adder, to provide modulation signal to the outer audio equipment after stack to process.Transmit by sharing same emulation bus after the signal of multiple microphones is modulated, can adopt the earphone interface connector of existing standard to be connected to outer audio equipment, and be conducive to the miniaturization of Headphone device.
Description
Technical field
The utility model relates to electronic technology field, is specifically related to a kind of Headphone device.
Background technology
The 3.5mm earphone interface standard one of general portable product is OMTP (Open Mobile Terminal Platform in the market, OMTP) standard, another kind is CTIA (Cellular Telecommunications Industry Association, wireless communication industry association of the U.S.) standard, wherein, the interface end of OMTP standard is respectively L channel from outside to inside, R channel, microphone, ground wire, the interface end of CTIA standard is respectively L channel from outside to inside, R channel, ground wire, microphone, on market, most earphone need to meet any one above-mentioned standard to be applied to corresponding portable product.But, the Headphone device of the above-mentioned earphone interface standard of existing employing often only contains single microphone, along with the demand of people to noise cancelling headphone, multiple microphones are set on Headphone structure can be more and more general, and because interconnection resource is limited, it is difficult that multiple microphones are connected directly to above-mentioned any one earphone interface terminal.
A kind of headphone of the active noise reduction that contains multiple microphones is disclosed in prior art, comprise and be positioned near the microphone of each loud speaker, and near each loud speaker, arrange independent processor to simulation microphone signal process, this Headphone structure adopts special earphone interface terminal, too much functional unit is directly arranged in Headphone device simultaneously, cause the increase of development cost, be unfavorable for the miniaturization of Headphone device.
Utility model content
The purpose of this utility model is, provides a kind of multiple microphone to share the Headphone device of same emulation bus, solves above technical problem.
The technical problem that the utility model solves can realize by the following technical solutions:
Multiple microphones are shared the Headphone device of same emulation bus, wherein, comprise,
At least two microphones, for sensing external sound information to be converted to the signal of telecommunication;
Modulating unit, the output of each microphone connects a modulating unit, for one carrier signal being modulated to rear transmission according to the signal of telecommunication of described microphone output;
Signal adder, is connected with the output of described modulating unit, and the signal after modulation is added, and transmits to share same transmission line;
Interface connector, the splicing ear being electrically connected with outer audio equipment is provided, described interface connector is provided with the first link, and described the first link is connected with the output of described signal adder, to provide microphone modulated signal to the outer audio equipment after stack to process.
Preferably, also comprise a Voltage-current conversion unit, described Voltage-current conversion unit is connected in described in each microphone and described in each between modulating unit, after the voltage signal of described microphone is converted to current signal, carries out current-modulation at described modulating unit.
Preferably, also comprise a Voltage-current conversion unit, described Voltage-current conversion unit is connected in described in each between modulating unit and described signal adder, transfers to described signal adder after current signal and adds up for microphone modulated signal is converted to.
Preferably, also comprise a carrier oscillator, be connected with described modulating unit, to produce high-frequency carrier signal.
Preferably, described carrier oscillator adopts quartz crystal oscillator circuits, the delay cell that described quartz crystal oscillator circuits comprises quartz crystal and is connected with described quartz crystal.
Preferably, described carrier oscillator adopts voltage-controlled oscillator circuit, and the input of described voltage-controlled oscillator circuit connects the output of described microphone.
Preferably, described microphone adopts the simulation microphone based on MEMS (micro electro mechanical system).
Preferably, described interface connector has four links, and described the first link is positioned at the 3rd position or the 4th position that described interface connector is arranged from outside to inside.
Preferably, described in one microphone and described in another microphone there is the sensing range of different frequency range, can be mutually not overlapping in audiorange with the audio signal of obtaining.
Beneficial effect: owing to adopting above technical scheme, the utility model by arrange modulating unit by the signal of multiple microphones modulate after share same emulation bus transmit, can adopt the earphone interface connector of existing standard to be connected to outer audio equipment, and be conducive to the miniaturization of Headphone device.
Brief description of the drawings
Fig. 1 is a kind of system architecture schematic diagram of the present utility model;
Fig. 2 is the circuit connection diagram of a kind of specific embodiment of the present utility model;
Fig. 3 is the circuit connection diagram of another kind of specific embodiment of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope that the utility model is protected.
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as restriction of the present utility model.
With reference to Fig. 1, multiple microphones are shared the Headphone device of same emulation bus, wherein, comprise,
At least two microphones 1, for sensing external sound information to be converted to the signal of telecommunication;
Modulating unit 2, the output of each microphone 1 connects a modulating unit 2, for the signal of telecommunication of exporting according to microphone 1, one carrier signal is modulated to rear transmission;
Signal adder 3, is connected with the output of modulating unit 2, and the signal after modulation is added, and transmits to share same transmission line;
Interface connector 4, the splicing ear being electrically connected with outer audio equipment 5 is provided, interface connector 4 is provided with the first link, and the first link is connected with the output of signal adder 3, to provide microphone modulated signal to the outer audio equipment 5 after stack to process.
The utility model by arrange modulating unit 2 by the signal of multiple microphones 1 modulate after share same emulation bus transmit, can adopt existing standard earphone interface connector 4 to be connected to outer audio equipment 5, the interior microphone modulation signal of demodulating unit 6 with the transmission of demodulation emulation bus that arrange of outer audio equipment 5, also set handling device 7 of outer audio equipment 5, carry out subsequent treatment with the microphone signal to after demodulation, be of the present utility modelly provided with the miniaturization that is beneficial to Headphone device.
As a kind of preferred embodiment of the present utility model, with reference to Fig. 2, also comprise a Voltage-current conversion unit (V-I) 8, Voltage-current conversion unit 8 is connected between each microphone 1 and each modulating unit 2, for the voltage signal of microphone 1 is converted to after current signal, modulating unit 2 carries out current-modulation.
Or, as a kind of preferred embodiment of the present utility model, with reference to Fig. 3, Voltage-current conversion unit (V-I) 8 is connected between each modulating unit 2 and signal adder 3, after modulated signal is converted to current signal, current signal is added.
As a kind of preferred embodiment of the present utility model, one microphone and another microphone have the sensing range of different frequency range, the audio signal of obtaining can be mutually not overlapping in audiorange, can phase mutual interference when making modulated signal can transmit in same emulation bus.
As a kind of preferred embodiment of the present utility model, microphone adopts the simulation microphone based on MEMS (micro electro mechanical system).Or microphone adopts the digital microphone based on MEMS (micro electro mechanical system), digital microphone connects modulating unit 2 by connecting after being converted to analog signal after a digital to analog converter.
Conventional modulation system has the modes such as amplitude modulation(PAM), frequency modulation(FM) and phase-modulation, and in reality, mode of frequency regulation has the advantages such as signal band is wide, signal to noise ratio is high, antijamming capability is strong, preferably adopts mode of frequency regulation to modulate to the voice signal of microphone senses.Mode of frequency regulation carries by change that wave frequency makes it with the signal of telecommunication (being called modulation signal) of microphone output thereby identical realizations of the variation of amplitude modulated, the actual frequency offset amount of carrier wave is decided by increase or the minimizing of modulation signal amplitude, frequency shift (FS) refers to the amount of carrier shift centre frequency in modulated process, the frequency that centre frequency is produced by a carrier oscillator vibration or the frequency producing according to carrier oscillator vibration obtain through frequency multiplication, when the amplitude of modulation signal be on the occasion of time, carry wave frequency and become large, and the amplitude of modulation signal is while being negative value, carry wave frequency and will be less than centre frequency.
As a kind of preferred embodiment of the present utility model, also comprise a carrier oscillator, be connected with modulating unit 2, to produce carrier signal.A kind of modulated process of the present utility model is as follows: voice signal is converted to the corresponding signal of telecommunication by microphone 1, common microphone 1 inside configuration arranges amplifier, after exporting the signal of telecommunication of an amplification, deliver to modulating unit 2, meanwhile, produce carrier signal by carrier oscillator and also deliver to modulating unit 2, modulating unit transmits after utilizing the signal of telecommunication to modulate carrier signal, preferably, modulation signal is converted into and is entered signal adder 3 after current signal and be added by a voltage-current converter 8, the same emulation bus of following of Signal share after addition is connected to outer audio equipment 5 by earphone interface connector 4.
As a kind of preferred embodiment of the present utility model, carrier oscillator can adopt quartz crystal oscillator circuit, the delay cell that quartz crystal oscillator circuit comprises quartz crystal and is connected with quartz crystal.Quartz crystal has advantages of that frequency stability is good.
As a kind of preferred embodiment of the present utility model, modulating unit 2 comprises voltage-controlled oscillator circuit, and the input of voltage-controlled oscillator circuit connects the output of microphone.The output frequency of voltage controlled oscillator is proportional to added control voltage within the specific limits, the signal of telecommunication of the output by microphone is directly controlled the frequency of oscillation of voltage controlled oscillator as modulation signal, according to the difference of carrier frequency, the reactance component difference that voltage controlled oscillator uses.Directly change the parameter of reactance component by modulation signal, make the instantaneous frequency of output signal with modulation signal linear change.This frequency-modulating process is direct frequency modulation, has the simple advantage of circuit.
As a kind of preferred embodiment of the present utility model, interface connector has four links, the first link is positioned at the 3rd position or the 4th position that interface connector is arranged from outside to inside, when interface connector adopts the interface end of OMTP standard, is the 3rd position; When interface connector adopts the interface end of CTIA standard, it is the 4th position.
The foregoing is only the utility model preferred embodiment; not thereby limit execution mode of the present utility model and protection range; to those skilled in the art; the scheme that being equal to of should recognizing that all utilization the utility model specifications and diagramatic content done replaces and apparent variation obtains, all should be included in protection range of the present utility model.
Claims (9)
1. the Headphone device of many shared same emulation buss of microphone, is characterized in that, comprise,
At least two microphones, for sensing external sound information to be converted to the signal of telecommunication;
Modulating unit, the output of each microphone connects a modulating unit, for one carrier signal being modulated to rear transmission according to the signal of telecommunication of described microphone output;
Signal adder, is connected with the output of described modulating unit, and the signal after modulation is added, and transmits to share same transmission line;
Interface connector, the splicing ear being electrically connected with outer audio equipment is provided, described interface connector is provided with the first link, and described the first link is connected with the output of described signal adder, to provide microphone modulated signal to the outer audio equipment after stack to process.
2. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, also comprise a Voltage-current conversion unit, described Voltage-current conversion unit is connected in described in each microphone and described in each between modulating unit, after the voltage signal of described microphone is converted to current signal, carries out current-modulation at described modulating unit.
3. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, also comprise a Voltage-current conversion unit, described Voltage-current conversion unit is connected in described in each between modulating unit and described signal adder, transfers to described signal adder after current signal and is added for microphone modulated signal is converted to.
4. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, also comprises a carrier oscillator, is connected, to produce high-frequency carrier signal with described modulating unit.
5. multiple microphone according to claim 4 is shared the Headphone device of same emulation bus, it is characterized in that, described carrier oscillator comprises quartz crystal oscillator circuit, the delay cell that described quartz crystal oscillator circuit comprises quartz crystal and is connected with described quartz crystal.
6. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, described modulating unit comprises voltage-controlled oscillator circuit, and the input of described voltage-controlled oscillator circuit connects the output of described microphone.
7. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, described microphone adopts the simulation microphone based on MEMS (micro electro mechanical system).
8. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, described interface connector has four links, and described the first link is positioned at the 3rd position or the 4th position that described interface connector is arranged from outside to inside.
9. multiple microphone according to claim 1 is shared the Headphone device of same emulation bus, it is characterized in that, described in one microphone and described in another microphone there is the sensing range of different frequency range, can be mutually not overlapping in audiorange with the audio signal of obtaining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231477.6U CN203942627U (en) | 2014-05-07 | 2014-05-07 | Multiple microphones are shared the Headphone device of same emulation bus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231477.6U CN203942627U (en) | 2014-05-07 | 2014-05-07 | Multiple microphones are shared the Headphone device of same emulation bus |
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| CN203942627U true CN203942627U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420231477.6U Expired - Fee Related CN203942627U (en) | 2014-05-07 | 2014-05-07 | Multiple microphones are shared the Headphone device of same emulation bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100985A (en) * | 2014-05-07 | 2015-11-25 | 钰太芯微电子科技（上海）有限公司 | Earphone device with multiple microphones sharing one analog bus |
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2014
- 2014-05-07 CN CN201420231477.6U patent/CN203942627U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105100985A (en) * | 2014-05-07 | 2015-11-25 | 钰太芯微电子科技（上海）有限公司 | Earphone device with multiple microphones sharing one analog bus |
| CN105100985B (en) * | 2014-05-07 | 2019-01-18 | 钰太芯微电子科技（上海）有限公司 | Multiple microphones share the Headphone device of same emulation bus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141112 Termination date: 20200507 |
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| CF01 | Termination of patent right due to non-payment of annual fee |