CN203492198U - Condenser microphone connecting line for providing phantom power via USB interface - Google Patents
Condenser microphone connecting line for providing phantom power via USB interface Download PDFInfo
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- CN203492198U CN203492198U CN201320514575.6U CN201320514575U CN203492198U CN 203492198 U CN203492198 U CN 203492198U CN 201320514575 U CN201320514575 U CN 201320514575U CN 203492198 U CN203492198 U CN 203492198U
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- connecting line
- capacitance microphone
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Abstract
The utility model provides a connecting line for providing a phantom power supply for a condenser microphone via a USB interface. One end of the condenser microphone connecting line is a condenser microphone connecting interface, and the other is a sound device connecting interface. The condenser microphone connecting line is also equipped with the USB interface and a DC-DC boost conversion circuit. The condenser microphone connecting line of the utility model obtains a 5V work power supply via the USB interface, and then supplies power to the condenser microphone via the DC-DC conversion circuit. By using the condenser microphone connecting line of the utility model, the phantom power and a phantom power connecting line do not need to be configured additionally, thereby reducing the use cost, and being very convenient to use and carry.
Description
Technical field
The utility model relates to a kind of capacitance microphone connecting line, particularly relates to a kind ofly by USB interface, powering and without the capacitance microphone connecting line of separately establishing phantom power.
Background technology
Capacitance microphone is a kind of microphone that by the variation of capacitance size, voice signal is converted into the signal of telecommunication, because it has dynamically advantage large, that signal to noise ratio is high, is widely used.Capacitance microphone inside is provided with field effect transistor amplification circuit, and it needs 24V or the direct current supply of 48V, and conventional stereo set cannot be powered for it, therefore, while using capacitance microphone, must additional configuration phantom power be its power supply.
As shown in Figures 1 and 2, current capacitance microphone in use, need be equipped with microphone connecting line 1, phantom power 2, Phantom Power connecting line 3 simultaneously, one end of microphone connecting line 1 is connected with stereo set, the other end is connected with capacitance microphone 4 by phantom power 2 and Phantom Power connecting line 3, microphone connecting line 1 is for phantom power being offered to capacitance microphone 4, and the electroacoustic signal after capacitance microphone 4 is changed is transferred to stereo set.
Obviously, additional configuration phantom power 2 has not only increased the cost that uses capacitance microphone 4, and phantom power 2 bulk volume are larger, carries and uses all inconvenient.
Utility model content
In view of the foregoing, the purpose of this utility model is to provide a kind of and provides the capacitance microphone connecting line of Phantom Power by USB interface for capacitance microphone.This capacitance microphone connecting line obtains 5V working power from outside by USB interface, after processing, DC-DC voltage up converting circuit is converted to 24V or the voltage of 48V, for capacitance microphone power supply, thereby without additional configuration phantom power and Phantom Power connecting line again, not only can reduce costs and use, carry all very convenient.
For achieving the above object, the utility model is by the following technical solutions:
The capacitance microphone connecting line of Phantom Power is provided by USB interface, and one end is capacitance microphone connecting interface, and the other end is stereo set connecting interface, and this capacitance microphone connecting line is also provided with USB interface and DC-DC voltage up converting circuit;
The power output end of this USB interface is connected with this capacitance microphone connecting interface by this DC-DC voltage up converting circuit, and this stereo set connecting interface is connected with this capacitance microphone connecting interface by this DC-DC voltage up converting circuit.
Further,
Described DC-DC voltage up converting circuit is arranged on capacitance microphone connecting line body.
Described DC-DC voltage up converting circuit is arranged in the circuit system of capacitance microphone.
Described DC-DC voltage up converting circuit is provided with for adjusting the diverter switch of output voltage.
The utility model has the advantage of,
1, the use difficulty that has significantly reduced capacitance microphone, is conducive to further promoting the use of of capacitance microphone;
2, without additional configuration phantom power and Phantom Power connecting line, reduced by two audio coupler, make the junction loss of sound in whole system and disturb significantly and reduce, effectively raising the sound signal to noise ratio of whole capacitance microphone system, having reduced the distortion that sound produces in transmitting procedure.
3, by USB interface and DC-DC voltage up converting circuit, provide power supply for capacitance microphone, this two-part cost is far below a phantom power cost independently, thereby significantly reduced the use cost of capacitance microphone;
4, phantom power is generally, by linear transformer, 220V alternating voltage is converted to 48V direct voltage, and its power supply conversion efficiency is far below the DC power supply conversion efficiency of DC-DC voltage up converting circuit, thereby the utility model has also improved energy conversion efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the microphone connecting line of capacitance microphone in prior art.
Fig. 2 is that in prior art, capacitance microphone is used stateful connection schematic diagram.
Fig. 3 is the schematic diagram of capacitance microphone connecting line of the present utility model.
Fig. 4 is the circuit theory diagrams of DC-DC voltage up converting circuit in the utility model the first specific embodiment.
Fig. 5 is the circuit theory diagrams of DC-DC voltage up converting circuit in the utility model the second specific embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 3 is the schematic diagram of capacitance microphone connecting line of the present utility model.As shown in the figure, the disclosed capacitance microphone connecting line that Phantom Power is provided by USB interface of the utility model, its one end is capacitance microphone connecting interface 30, the other end is stereo set connecting interface 40; On capacitance microphone connecting line, be also provided with usb 10 and be built in the DC-DC voltage up converting circuit 2O in connecting line.The power output end of usb 10 is connected with capacitance microphone connecting interface 30 by DC-DC voltage up converting circuit 20, and stereo set connecting interface 40 is also connected with capacitance microphone connecting interface 30 by DC-DC voltage up converting circuit 20.
Usb 10 can have USB interface and can be USB interface with computer, portable power source, charger for mobile phone etc. provides the power supply unit of DC power supply to be connected, the usb 1 of capacitance microphone connecting line 0 is patched in the USB interface of power supply unit, capacitance microphone connecting interface 30 joins with capacitance microphone, stereo set connecting interface 40 patches on the corresponding interface of stereo set, capacitance microphone can normally be used, this be due to:
The field effect transistor amplification circuit of capacitance microphone inside needs the supply current of 20mA left and right, and power supply unit can be the supply current that usb 10 provides 5V direct voltage and is greater than 500mA;
Computer USB 2.0 interfaces of take are example, and it can provide the power supply of 5V/500mA, and the conversion efficiency of DC-DC voltage up converting circuit of take is calculated as 70%: 5VX0.5AX0.7/24V=0.073A, that is and, USB2.0 interface can provide for capacitance microphone the power supply of the about 73mA of 24V; Or 5VX0.5Ax0.7/48V=0.036A, provides the power supply of the about 36mA of 48V.
And for computer USB 3.0, mobile battery, charger for mobile phone; the output current of its USB interface is generally all more than 900mA; same conversion efficiency of take DC-DC voltage up converting circuit is calculated as 70%: 5Vx0.9Ax0.7/24V=0.13125; that is, USB3.0 interface can provide for capacitance microphone the power supply of the about 13lmA of 24V; Or 5Vx0.9Ax0.7/48V=0.065, can provide the power supply of the about 65mA of 48V, can guarantee the normal steady operation of capacitance microphone completely.
In preferred technical scheme, can the diverter switch of an adjustable output voltage be set on DC-DC voltage up converting circuit, by this diverter switch, user can select 24V or the Voltage-output of 48V (realizing by convert resistance).When the USB interface electricity shortage of power supply unit or capacitance microphone power consumption is when larger, regulate diverter switch, selecting 24V output voltage is capacitance microphone power supply, to guarantee that it normally works; Xiao's capacitance microphone connecting line patches when the larger power supply unit of computer USB 3.0 these class output currents, can select the output voltage of 48V, makes capacitance microphone obtain better audio output.
Described DC-DC voltage up converting circuit has been prior art, Figure 4 shows that the DC-DC voltage up converting circuit of realizing based on AX5203 chip, Fig. 5 is the DC-DC voltage up converting circuit of realizing based on MP3425 chip, in the utility model, no longer the correlation technique of DC-DC voltage up converting circuit is described in detail.
In addition, the setting position of DC-DC voltage up converting circuit can be adjusted as required, such as, only be arranged on capacitance microphone connecting line body and do not affect capacitance microphone itself, also can be incorporated in the circuit system of capacitance microphone, by the connecting line with USB interface and capacitance microphone connecting interface, use capacitance microphone.
The capacitance microphone connecting line that Phantom Power is provided by USB interface of the present utility model, by USB interface and DC-DC voltage up converting circuit are set in capacitance microphone connecting line, USB interface is connected on power supply unit, the power output end of USB interface is connected with capacitance microphone by DC-DC voltage up converting circuit, can be capacitance microphone power supply, and without additional configuration phantom power and Phantom Power connecting line again, not only reduced cost, and use and carry all very convenient, the audio of output is more good, has the advantage of energy-conserving and environment-protective concurrently.
The above is preferred embodiment of the present utility model and the know-why used thereof; for a person skilled in the art; in the situation that not deviating from spirit and scope of the present utility model; the apparent changes such as any equivalent transformation based on technical solutions of the utility model basis, simple replacement, within all belonging to the utility model protection range.
Claims (4)
1. the capacitance microphone connecting line of Phantom Power is provided by USB interface, and one end is capacitance microphone connecting interface, and the other end is stereo set connecting interface, it is characterized in that: this capacitance microphone connecting line is also provided with USB interface and DC-DC voltage up converting circuit;
The power output end of this USB interface is connected with this capacitance microphone connecting interface by this DC-DC voltage up converting circuit, and this stereo set connecting interface is connected with this capacitance microphone connecting interface by this DC-DC voltage up converting circuit.
2. the capacitance microphone connecting line that Phantom Power is provided by USB interface as claimed in claim 1, is characterized in that, described DC-DC voltage up converting circuit is arranged on capacitance microphone connecting line body.
3. the capacitance microphone connecting line that Phantom Power is provided by USB interface as claimed in claim 1, is characterized in that, described DC-DC voltage up converting circuit is arranged in the circuit system of capacitance microphone.
4. as described in claim 1 or 2 or 3, by USB interface, provide the capacitance microphone connecting line of Phantom Power, it is characterized in that, described DC-DC voltage up converting circuit is provided with for adjusting the diverter switch of output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320514575.6U CN203492198U (en) | 2013-08-22 | 2013-08-22 | Condenser microphone connecting line for providing phantom power via USB interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320514575.6U CN203492198U (en) | 2013-08-22 | 2013-08-22 | Condenser microphone connecting line for providing phantom power via USB interface |
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| Publication Number | Publication Date |
|---|---|
| CN203492198U true CN203492198U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320514575.6U Expired - Fee Related CN203492198U (en) | 2013-08-22 | 2013-08-22 | Condenser microphone connecting line for providing phantom power via USB interface |
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| CN (1) | CN203492198U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427449A (en) * | 2013-08-22 | 2015-03-18 | 朱一波 | Condenser microphone connecting line for providing phantom power via USB interface |
| CN108632690A (en) * | 2017-07-18 | 2018-10-09 | 北京视联动力国际信息技术有限公司 | A kind of hand microphone and Gooseneck type microphone switching method and apparatus |
| CN110989812A (en) * | 2019-11-05 | 2020-04-10 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Encryption device, system and encryption device control method |
-
2013
- 2013-08-22 CN CN201320514575.6U patent/CN203492198U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427449A (en) * | 2013-08-22 | 2015-03-18 | 朱一波 | Condenser microphone connecting line for providing phantom power via USB interface |
| CN108632690A (en) * | 2017-07-18 | 2018-10-09 | 北京视联动力国际信息技术有限公司 | A kind of hand microphone and Gooseneck type microphone switching method and apparatus |
| CN110989812A (en) * | 2019-11-05 | 2020-04-10 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Encryption device, system and encryption device control method |
| CN110989812B (en) * | 2019-11-05 | 2021-05-28 | 武汉船舶通信研究所（中国船舶重工集团公司第七二二研究所） | Encryption device, system and encryption device control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20180822 |
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| CF01 | Termination of patent right due to non-payment of annual fee |