CN219834362U - Conference microphone and system powered by phantom power supply - Google Patents
Conference microphone and system powered by phantom power supply Download PDFInfo
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- CN219834362U CN219834362U CN202321077369.3U CN202321077369U CN219834362U CN 219834362 U CN219834362 U CN 219834362U CN 202321077369 U CN202321077369 U CN 202321077369U CN 219834362 U CN219834362 U CN 219834362U
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Abstract
The utility model discloses a conference microphone and a system powered by a phantom power supply, wherein the microphone comprises: the microphone comprises an audio balance transmission module, a cannon male head, a digital power supply, an MCU, a microphone core and a touch microphone setting module; the audio balance transmission module is respectively connected with the cannon male head, the MCU and the microphone; the cannon male head is respectively connected with the digital power supply and the microphone; the digital power supply is respectively connected with the MCU and the microphone setting module; the MCU is respectively connected with the microphone setting module and the microphone core; the cannon male head is used for being connected with a cannon female seat connected with a phantom power supply; the balance transmission module adopts a triode common collector amplifying circuit; the microphone setting module is used for switching on and switching off the conference microphone. The utility model can be used for improving the anti-interference capability of the conference microphone and can be widely applied to the technical field of audio equipment.
Description
Technical Field
The utility model relates to the technical field of audio equipment, in particular to a conference microphone powered by a phantom power supply and a system.
Background
The microphone is also called a pickup, can realize the conversion from sound to electric signals, and is basic equipment of audio systems such as conference systems, public broadcasting systems, teaching sound amplification, professional sound amplification and the like. The conference microphone is generally connected with the preamplifier or the sound console through an audio line, the balance mode is a common connection mode, the existing balance transmission mode adopts a pair of differential signal lines with opposite phases and a ground wire transmission mode, the anti-interference capability can be greatly improved, the conference microphone is very suitable for being applied to long-distance and high-quality equipment, the preamplifier and the sound console are generally connected through the balance differential mode, phantom power supplies of the preamplifier and the sound console are obtained on one hand, and on the other hand, audio signals are transmitted to the preamplifier and the sound console, and further the power amplifier amplifies sound on site through the sound console.
Most of the existing conference microphones are arranged on a table or embedded in the table, and are provided with a control switch for opening and closing. However, the existing conference microphones have the following disadvantages: the audio adopts balanced transmission, the driving capability is weak, when the conference microphone is far away from the sound console, the anti-interference capability is poor, and the site noise is large; because phantom power supply current output by equipment such as a preamplifier and a sound console is only a few milliamperes, a mechanical control switch is generally adopted by the existing conference microphone, and mechanical vibration is generated by the mechanical switch when the mechanical switch is operated and pressed, so that mechanical noise is inevitably generated.
Disclosure of Invention
In view of the above, the embodiment of the utility model provides a conference microphone powered by a phantom power supply and a system thereof, which are used for improving the anti-interference capability of the conference microphone.
The embodiment of the utility model provides a conference microphone powered by a phantom power supply, which comprises: the microphone comprises an audio balance transmission module, a cannon male head, a digital power supply, an MCU, a microphone core and a touch microphone setting module;
the audio balance transmission module is respectively connected with the cannon male head, the MCU and the microphone; the cannon male head is respectively connected with the digital power supply and the microphone core; the digital power supply is respectively connected with the MCU and the microphone setting module; the MCU is respectively connected with the microphone setting module and the microphone core;
the cannon male head is used for being connected with a cannon female seat connected with a phantom power supply; the balance transmission module adopts a triode common collector amplifying circuit; the microphone setting module is used for switching on and off the conference microphone.
Optionally, the first end of the audio balance transmission module is connected with the first end of the cannon plug through a power line, the second end of the audio balance transmission module is connected with the second end of the cannon plug through an audio line, the third end of the audio balance transmission module is connected with the first end of the MCU through a control line, and the fourth end of the audio balance transmission module is connected with the first end of the microphone through an audio line.
Optionally, the third end of the cannon male head is connected with the first end of the digital power supply through a power line, and the fourth end of the cannon male head is connected with the second end of the microphone core through a power line.
Optionally, the second end of the digital power supply is connected with the second end of the MCU through a power line, and the third end of the digital power supply is connected with the first end of the microphone setting module through a power line.
Optionally, the third end of the MCU is connected to the third end of the microphone core through a control line, and the fourth end of the MCU is connected to the second end of the microphone setting module through a control line.
Optionally, the microphone setting module includes a key and a touch module.
Optionally, the third end of the digital power supply is connected with the first end of the touch module through a power line, the fourth end of the MCU is connected with the second end of the touch module through a control line, and the first end of the key is connected with the third end of the touch module through a control line.
Optionally, the conference microphone further comprises a light emitting tube;
the fifth end of the MCU is connected with the first end of the luminous tube through a control line.
The utility model also provides a conference system powered by the phantom power supply, which comprises the conference microphone powered by the phantom power supply, the sound console, the power amplifier module and the sound box;
wherein, the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console; the sound console is also connected with the power amplification module, and the power amplification module is connected with the sound box;
the mixing console includes a phantom power supply for outputting a specific phantom voltage to the conference microphone through the cannon base to power the conference microphone.
Optionally, the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console; the sound console is also connected with the power amplifier module, the power amplifier module is connected with the sound box, and the sound box comprises:
the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console through an audio line; the sound console is further connected with the power amplification module through an audio line, and the power amplification module is connected with the sound box through an audio line.
The technical scheme in the embodiment of the utility model has the following advantages:
the audio balance transmission module of the conference microphone adopts the triode common collector amplifying circuit, so that the alternating current internal resistance is small, and when the conference microphone is far away from the sound console, the anti-interference capability is strong, and the problem of sound amplification noise can be solved; the touch microphone setting module with low power consumption is adopted, the MCU is utilized to control the microphone setting module, the conference microphone can not generate mechanical noise when the microphone is switched on and off, and mute operation is realized.
Drawings
FIG. 1 is an overall block diagram of a phantom power-powered conferencing system in accordance with the present utility model;
FIG. 2 is an overall block diagram of a phantom power-fed conference microphone of the present utility model;
FIG. 3 is a circuit block diagram of a digital power supply of the present utility model;
fig. 4 is a circuit diagram of a touch microphone setup module according to the present utility model;
fig. 5 is a circuit configuration diagram of an audio balance transmission module according to the present utility model.
Detailed Description
Referring to fig. 1, fig. 1 is an overall block diagram of a phantom power-powered conferencing system according to the present utility model, which may include: conference microphone, sound console, power amplifier module and audio amplifier.
Wherein, the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console; the sound console is also connected with the power amplification module, and the power amplification module is connected with the sound box.
Further, the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console through an audio line; the sound console is further connected with the power amplification module through an audio line, and the power amplification module is connected with the sound box through an audio line.
The mixing console includes a phantom power supply for outputting a specific phantom voltage to the conference microphone through the cannon base to power the conference microphone.
Specifically, the conference system of the utility model can be composed of a plurality of conference microphones, a sound console, a power amplifier module and a sound box. The sound console outputs specific phantom voltage to supply power to the conference microphone through the cannon female base; in an alternative embodiment, the specific phantom voltage may be a phantom voltage of +48V.
The conference microphone can be started through the touch microphone setting module, and audio input from the conference microphone is output to the sound console through the audio balance transmission module and then passes through the power amplification module, and then the sound box expands sound on site.
Referring to fig. 2, fig. 2 is an overall block diagram of a phantom power-powered conference microphone according to the utility model, which may include: the microphone comprises an audio balance transmission module, a cannon male head, a digital power supply, an MCU, a microphone core and a touch microphone setting module.
The audio balance transmission module is respectively connected with the cannon male head, the MCU and the microphone; the cannon male head is respectively connected with the digital power supply and the microphone core; the digital power supply is respectively connected with the MCU and the microphone setting module; the MCU is respectively connected with the microphone setting module and the microphone core.
The cannon male head is used for being connected with a cannon female seat connected with a phantom power supply; the balance transmission module adopts a triode common collector amplifying circuit; the microphone setting module is used for switching on and off the conference microphone.
Referring to fig. 3, fig. 3 is a circuit structure diagram of a digital power supply according to the present utility model, and the working principle of the digital power supply is as follows:
specifically, the phantom voltage of +48v of the sound console is input from the 2 nd and 3 rd pins of the cannon male KL1 of the conference microphone, and is supplied to the IC3 (TMI 3408) by the 5V voltage generated by the emitter of the triode Q1 through the series voltage stabilizing circuit, namely the resistor R1, the resistor R2, the capacitor E1, the triode Q1, the resistor R3, the voltage stabilizing tube ZD1 and the capacitor C1 in fig. 3, to finally generate VCC5 (3.3V), and supply the supply voltages of the IC1 (STM 8L052C 6), the IC2 (PT 8022S) and the light emitting tube L1.
The switching control section of the conference microphone may include: MCU (IC 1) adopts low-power consumption STM8L052C6, detects the button through touching the module and is touched the back, can carry out corresponding control to luminotron L1, audio frequency balanced transmission module and miaow core's lamp to realize corresponding function.
Referring to fig. 4, fig. 4 is a circuit diagram of a touch microphone setting module according to the present utility model, and the microphone setting module operates as follows:
specifically, after the key K1 is touched, the GPIO2 level change of the IC2 (PT 8022S) is sent to the IC1, that is, the MCU detects, and after the detection, the IC1 performs corresponding control on the light emitting tube L1, the audio balance transmission module, and the lamp of the microphone.
Referring to fig. 5, fig. 5 is a circuit structure diagram of an audio balance transmission module according to the present utility model, and the working principle of the audio balance transmission module is as follows:
specifically, the analog power supply: the sound console +48V phantom voltage is input from the 2 nd pin and the 3 rd pin of the cannon male head KL1 of the conference microphone, and forms a voltage VCC2 for a circuit through a resistor R3, a resistor R10, an emitter-base electrode of a triode Q1, a triode Q3, a base electrode of the triode Q4, a resistor R11 and a resistor R8, wherein the voltage VCC2 provides a voltage for the base electrode of the triode Q4 through a resistor R16 and provides a voltage for the collector electrode of the triode Q4 through a resistor R12, so that the triode Q4 is in a conducting state; the voltage VCC2 is divided by the resistors R6 and R13, and then E1 is filtered (through MIC_IN) to supply power to the capacitive microphone.
Further, the audio loop: the capacitor type microphone audio signal is input from MIC_IN, is amplified by a base electrode of a coupling triode Q4 after passing through a capacitor C11 and a capacitor C10, is output from a collector electrode of the Q4, is amplified by a coupling triode Q2 of the capacitor C6, is amplified by a common collector amplifying end formed by a collector electrode of the triode Q2, an emitter electrode of the triode Q1 and a resistor R3, and is amplified by a common collector, is amplified by an emitter electrode of the triode Q2, is amplified by a capacitor C9, an emitter electrode of the triode Q3 and a resistor R10, and is amplified by a common collector, and is output by a balanced output signal from the capacitor type microphone signal unbalanced input and the cannon pin KL1"+", "-".
When the key K1 is touched for the first time, the GPIO1 of the MCU (IC 1) is at a low level, the triode Q5 is cut off, the capacitor C10 has signal input, the capacitive microphone audio signals are output from the 2 nd pin and the 3 rd pin of the cannon male head KL1, when the key K1 is touched again, the GPIO1 of the MCU (IC 1) is at a high level, the triode Q5 is conducted, the capacitor C10 has no signal input, and the capacitive microphone audio signals cannot be output from the 2 nd pin and the 3 rd pin of the cannon male head KL 1.
The embodiment of the utility model has the following beneficial effects:
1. the balance transmission module adopts a triode common collector amplifying circuit, the alternating current internal resistance is small, and the problem of interference resistance caused by long-distance connection between a conference microphone and a sound console is solved.
2. A touch module for switching on and off among the microphone setting module of meeting microphone is connected with MCU to receive MCU control, avoided mechanical noise, realized the noiseless transition when meeting microphone switch microphone.
While the preferred embodiment of the present utility model has been described in detail, the present utility model is not limited to the above embodiments, and various equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the present utility model, and these equivalent modifications and substitutions are intended to be included in the scope of the present utility model as defined in the appended claims.
Claims (10)
1. A phantom power-supplied conference microphone, comprising: the microphone comprises an audio balance transmission module, a cannon male head, a digital power supply, an MCU, a microphone core and a touch microphone setting module;
the audio balance transmission module is respectively connected with the cannon male head, the MCU and the microphone; the cannon male head is respectively connected with the digital power supply and the microphone core; the digital power supply is respectively connected with the MCU and the microphone setting module; the MCU is respectively connected with the microphone setting module and the microphone core;
the cannon male head is used for being connected with a cannon female seat connected with a phantom power supply; the balance transmission module adopts a triode common collector amplifying circuit; the microphone setting module is used for switching on and off the conference microphone.
2. The phantom power-supplied conference microphone of claim 1, wherein a first end of the audio balance transmission module is connected to the first end of the cannon-cap via a power line, a second end of the audio balance transmission module is connected to the second end of the cannon-cap via an audio line, a third end of the audio balance transmission module is connected to the first end of the MCU via a control line, and a fourth end of the audio balance transmission module is connected to the first end of the microphone via an audio line.
3. The phantom powered conference microphone of claim 2 wherein the third end of the cannon-cap is connected to the first end of the digital power supply by a power cord and the fourth end of the cannon-cap is connected to the second end of the microphone core by a power cord.
4. A phantom powered conference microphone according to claim 3, wherein the second end of the digital power supply is connected to the second end of the MCU by a power line and the third end of the digital power supply is connected to the first end of the microphone set-up module by a power line.
5. The phantom power-powered conference microphone of claim 4 wherein the third end of the MCU is connected to the third end of the microphone core by a control line and the fourth end of the MCU is connected to the second end of the microphone set-up module by a control line.
6. The phantom power-powered conference microphone of claim 5, wherein the microphone setup module comprises a key and touch module.
7. The phantom power-powered conference microphone of claim 6 wherein the third terminal of the digital power supply is connected to the first terminal of the touch module by a power line, the fourth terminal of the MCU is connected to the second terminal of the touch module by a control line, and the first terminal of the key is connected to the third terminal of the touch module by a control line.
8. The phantom power-fed conference microphone of claim 5, further comprising a light emitting tube;
the fifth end of the MCU is connected with the first end of the luminous tube through a control line.
9. A phantom power-powered conferencing system, comprising: a plurality of conference microphones, sound consoles, power amplifier modules and sound boxes powered by a phantom power supply as claimed in any one of claims 1 to 8;
wherein, the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console; the sound console is also connected with the power amplification module, and the power amplification module is connected with the sound box;
the mixing console includes a phantom power supply for outputting a specific phantom voltage to the conference microphone through the cannon base to power the conference microphone.
10. The phantom power-powered conferencing system as set forth in claim 9, wherein said cannon male connector of each of said conference microphones is connected to a corresponding cannon female connector on said mixing console; the sound console is also connected with the power amplifier module, the power amplifier module is connected with the sound box, and the sound box comprises:
the cannon male head of each conference microphone is connected with a corresponding cannon female seat on the sound console through an audio line; the sound console is further connected with the power amplification module through an audio line, and the power amplification module is connected with the sound box through an audio line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321077369.3U CN219834362U (en) | 2023-05-06 | 2023-05-06 | Conference microphone and system powered by phantom power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321077369.3U CN219834362U (en) | 2023-05-06 | 2023-05-06 | Conference microphone and system powered by phantom power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219834362U true CN219834362U (en) | 2023-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321077369.3U Active CN219834362U (en) | 2023-05-06 | 2023-05-06 | Conference microphone and system powered by phantom power supply |
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| Country | Link |
|---|---|
| CN (1) | CN219834362U (en) |
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2023
- 2023-05-06 CN CN202321077369.3U patent/CN219834362U/en active Active
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